mirror of
https://github.com/gorhill/uBlock.git
synced 2026-03-11 09:04:36 +00:00
928ab91ab8
From uBO's dev console, type: - `µBlock.sessionFirewall.benchmark();` Keep in mind that it's the temporary ruleset being benchmarked.
689 lines
22 KiB
JavaScript
689 lines
22 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2014-present Raymond Hill
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see {http://www.gnu.org/licenses/}.
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Home: https://github.com/gorhill/uBlock
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*/
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'use strict';
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/******************************************************************************/
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// A standalone URL tokenizer will allow us to use URL tokens in more than
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// just static filtering engine. This opens the door to optimize other
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// filtering engine parts aside static filtering. This also allows:
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// - Tokenize only on demand.
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// - To potentially avoid tokenizing when same URL is fed to tokenizer.
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// - Benchmarking shows this to be a common occurrence.
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//
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// https://github.com/gorhill/uBlock/issues/2630
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// Slice input URL into a list of safe-integer token values, instead of a list
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// of substrings. The assumption is that with dealing only with numeric
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// values, less underlying memory allocations, and also as a consequence
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// less work for the garbage collector down the road.
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// Another assumption is that using a numeric-based key value for Map() is
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// more efficient than string-based key value (but that is something I would
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// have to benchmark).
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// Benchmark for string-based tokens vs. safe-integer token values:
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// https://gorhill.github.io/obj-vs-set-vs-map/tokenize-to-str-vs-to-int.html
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µBlock.urlTokenizer = {
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setURL: function(url) {
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if ( url !== this._urlIn ) {
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this._urlIn = url;
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this._urlOut = url.toLowerCase();
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this._tokenized = false;
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}
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return this._urlOut;
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},
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// Tokenize on demand.
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getTokens: function() {
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if ( this._tokenized === false ) {
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this._tokenize();
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this._tokenized = true;
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}
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return this._tokens;
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},
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tokenHashFromString: function(s) {
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var l = s.length;
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if ( l === 0 ) { return 0; }
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if ( l === 1 ) {
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if ( s === '*' ) { return 63; }
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if ( s === '.' ) { return 62; }
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}
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var vtc = this._validTokenChars,
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th = vtc[s.charCodeAt(0)];
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for ( var i = 1; i !== 8 && i !== l; i++ ) {
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th = th * 64 + vtc[s.charCodeAt(i)];
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}
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return th;
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},
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// https://github.com/chrisaljoudi/uBlock/issues/1118
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// We limit to a maximum number of tokens.
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_tokenize: function() {
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var tokens = this._tokens,
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url = this._urlOut,
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l = url.length;
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if ( l === 0 ) { tokens[0] = 0; return; }
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if ( l > 2048 ) {
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url = url.slice(0, 2048);
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l = 2048;
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}
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var i = 0, j = 0, v, n, ti, th,
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vtc = this._validTokenChars;
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for (;;) {
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for (;;) {
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if ( i === l ) { tokens[j] = 0; return; }
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v = vtc[url.charCodeAt(i++)];
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if ( v !== 0 ) { break; }
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}
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th = v; ti = i - 1; n = 1;
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for (;;) {
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if ( i === l ) { break; }
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v = vtc[url.charCodeAt(i++)];
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if ( v === 0 ) { break; }
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if ( n === 8 ) { continue; }
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th = th * 64 + v;
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n += 1;
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}
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tokens[j++] = th;
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tokens[j++] = ti;
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}
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},
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_urlIn: '',
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_urlOut: '',
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_tokenized: false,
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_tokens: [ 0 ],
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_validTokenChars: (function() {
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var vtc = new Uint8Array(128),
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chars = '0123456789%abcdefghijklmnopqrstuvwxyz',
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i = chars.length;
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while ( i-- ) {
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vtc[chars.charCodeAt(i)] = i + 1;
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}
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return vtc;
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})()
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};
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/******************************************************************************/
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µBlock.formatCount = function(count) {
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if ( typeof count !== 'number' ) {
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return '';
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}
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var s = count.toFixed(0);
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if ( count >= 1000 ) {
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if ( count < 10000 ) {
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s = '>' + s.slice(0,1) + 'k';
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} else if ( count < 100000 ) {
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s = s.slice(0,2) + 'k';
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} else if ( count < 1000000 ) {
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s = s.slice(0,3) + 'k';
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} else if ( count < 10000000 ) {
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s = s.slice(0,1) + 'M';
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} else {
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s = s.slice(0,-6) + 'M';
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}
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}
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return s;
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};
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// https://www.youtube.com/watch?v=DyvzfyqYm_s
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/******************************************************************************/
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µBlock.dateNowToSensibleString = function() {
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var now = new Date(Date.now() - (new Date()).getTimezoneOffset() * 60000);
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return now.toISOString().replace(/\.\d+Z$/, '')
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.replace(/:/g, '.')
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.replace('T', '_');
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};
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/******************************************************************************/
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µBlock.LineIterator = function(text, offset) {
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this.text = text;
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this.textLen = this.text.length;
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this.offset = offset || 0;
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};
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µBlock.LineIterator.prototype.next = function(offset) {
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if ( offset !== undefined ) {
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this.offset += offset;
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}
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var lineEnd = this.text.indexOf('\n', this.offset);
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if ( lineEnd === -1 ) {
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lineEnd = this.text.indexOf('\r', this.offset);
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if ( lineEnd === -1 ) {
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lineEnd = this.textLen;
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}
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}
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var line = this.text.slice(this.offset, lineEnd);
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this.offset = lineEnd + 1;
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return line;
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};
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µBlock.LineIterator.prototype.charCodeAt = function(offset) {
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return this.text.charCodeAt(this.offset + offset);
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};
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µBlock.LineIterator.prototype.eot = function() {
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return this.offset >= this.textLen;
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};
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/******************************************************************************/
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// The field iterator is less CPU-intensive than when using native
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// String.split().
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µBlock.FieldIterator = function(sep) {
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this.text = '';
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this.sep = sep;
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this.sepLen = sep.length;
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this.offset = 0;
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};
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µBlock.FieldIterator.prototype.first = function(text) {
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this.text = text;
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this.offset = 0;
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return this.next();
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};
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µBlock.FieldIterator.prototype.next = function() {
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var end = this.text.indexOf(this.sep, this.offset);
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if ( end === -1 ) {
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end = this.text.length;
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}
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var field = this.text.slice(this.offset, end);
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this.offset = end + this.sepLen;
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return field;
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};
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µBlock.FieldIterator.prototype.remainder = function() {
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return this.text.slice(this.offset);
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};
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/******************************************************************************/
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µBlock.CompiledLineIO = {
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serialize: JSON.stringify,
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unserialize: JSON.parse,
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blockStartPrefix: '#block-start-', // ensure no special regex characters
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blockEndPrefix: '#block-end-', // ensure no special regex characters
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Writer: function() {
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this.io = µBlock.CompiledLineIO;
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this.blockId = undefined;
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this.block = undefined;
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this.stringifier = this.io.serialize;
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this.blocks = new Map();
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this.properties = new Map();
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},
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Reader: function(raw, blockId) {
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this.io = µBlock.CompiledLineIO;
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this.block = '';
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this.len = 0;
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this.offset = 0;
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this.line = '';
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this.parser = this.io.unserialize;
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this.blocks = new Map();
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this.properties = new Map();
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let reBlockStart = new RegExp(
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'^' + this.io.blockStartPrefix + '(\\d+)\\n',
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'gm'
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);
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let match = reBlockStart.exec(raw);
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while ( match !== null ) {
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let beg = match.index + match[0].length;
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let end = raw.indexOf(this.io.blockEndPrefix + match[1], beg);
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this.blocks.set(parseInt(match[1], 10), raw.slice(beg, end));
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reBlockStart.lastIndex = end;
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match = reBlockStart.exec(raw);
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}
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if ( blockId !== undefined ) {
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this.select(blockId);
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}
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}
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};
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µBlock.CompiledLineIO.Writer.prototype = {
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push: function(args) {
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this.block[this.block.length] = this.stringifier(args);
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},
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select: function(blockId) {
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if ( blockId === this.blockId ) { return; }
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this.blockId = blockId;
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this.block = this.blocks.get(blockId);
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if ( this.block === undefined ) {
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this.blocks.set(blockId, (this.block = []));
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}
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},
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toString: function() {
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let result = [];
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for ( let [ id, lines ] of this.blocks ) {
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if ( lines.length === 0 ) { continue; }
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result.push(
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this.io.blockStartPrefix + id,
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lines.join('\n'),
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this.io.blockEndPrefix + id
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);
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}
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return result.join('\n');
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}
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};
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µBlock.CompiledLineIO.Reader.prototype = {
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next: function() {
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if ( this.offset === this.len ) {
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this.line = '';
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return false;
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}
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let pos = this.block.indexOf('\n', this.offset);
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if ( pos !== -1 ) {
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this.line = this.block.slice(this.offset, pos);
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this.offset = pos + 1;
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} else {
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this.line = this.block.slice(this.offset);
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this.offset = this.len;
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}
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return true;
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},
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select: function(blockId) {
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this.block = this.blocks.get(blockId) || '';
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this.len = this.block.length;
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this.offset = 0;
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return this;
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},
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fingerprint: function() {
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return this.line;
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},
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args: function() {
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return this.parser(this.line);
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}
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};
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/******************************************************************************/
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// I want this helper to be self-maintained, callers must not worry about
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// this helper cleaning after itself by asking them to reset it when it is no
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// longer needed. A timer will be used for self-garbage-collect.
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// Cleaning up 10s after last hit sounds reasonable.
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µBlock.stringDeduplicater = {
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strings: new Map(),
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timer: undefined,
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last: 0,
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lookup: function(s) {
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let t = this.strings.get(s);
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if ( t === undefined ) {
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t = this.strings.set(s, s).get(s);
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if ( this.timer === undefined ) {
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this.timer = vAPI.setTimeout(() => { this.cleanup(); }, 10000);
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}
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}
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this.last = Date.now();
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return t;
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},
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cleanup: function() {
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if ( (Date.now() - this.last) < 10000 ) {
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this.timer = vAPI.setTimeout(() => { this.cleanup(); }, 10000);
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} else {
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this.timer = undefined;
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this.strings.clear();
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}
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}
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};
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/******************************************************************************/
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µBlock.openNewTab = function(details) {
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if ( details.url.startsWith('logger-ui.html') ) {
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if ( details.shiftKey ) {
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this.changeUserSettings(
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'alwaysDetachLogger',
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!this.userSettings.alwaysDetachLogger
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);
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}
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details.popup = this.userSettings.alwaysDetachLogger;
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if ( details.popup ) {
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const url = new URL(vAPI.getURL(details.url));
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url.searchParams.set('popup', '1');
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details.url = url.href;
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let popupLoggerBox;
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try {
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popupLoggerBox = JSON.parse(
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vAPI.localStorage.getItem('popupLoggerBox')
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);
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} catch(ex) {
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}
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if ( popupLoggerBox !== undefined ) {
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details.box = popupLoggerBox;
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}
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}
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}
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vAPI.tabs.open(details);
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};
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/******************************************************************************/
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µBlock.MRUCache = function(size) {
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this.size = size;
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this.array = [];
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this.map = new Map();
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this.resetTime = Date.now();
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};
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µBlock.MRUCache.prototype = {
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add: function(key, value) {
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var found = this.map.has(key);
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this.map.set(key, value);
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if ( !found ) {
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if ( this.array.length === this.size ) {
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this.map.delete(this.array.pop());
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}
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this.array.unshift(key);
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}
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},
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remove: function(key) {
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if ( this.map.has(key) ) {
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this.array.splice(this.array.indexOf(key), 1);
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}
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},
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lookup: function(key) {
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var value = this.map.get(key);
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if ( value !== undefined && this.array[0] !== key ) {
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var i = this.array.indexOf(key);
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do {
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this.array[i] = this.array[i-1];
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} while ( --i );
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this.array[0] = key;
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}
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return value;
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},
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reset: function() {
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this.array = [];
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this.map.clear();
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this.resetTime = Date.now();
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}
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};
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/******************************************************************************/
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// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
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µBlock.escapeRegex = function(s) {
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return s.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
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};
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/******************************************************************************/
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µBlock.decomposeHostname = (function() {
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// For performance purpose, as simple tests as possible
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let reHostnameVeryCoarse = /[g-z_-]/;
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let reIPv4VeryCoarse = /\.\d+$/;
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let toBroaderHostname = function(hostname) {
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let pos = hostname.indexOf('.');
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if ( pos !== -1 ) {
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return hostname.slice(pos + 1);
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}
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return hostname !== '*' && hostname !== '' ? '*' : '';
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};
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let toBroaderIPv4Address = function(ipaddress) {
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if ( ipaddress === '*' || ipaddress === '' ) { return ''; }
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let pos = ipaddress.lastIndexOf('.');
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if ( pos === -1 ) { return '*'; }
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return ipaddress.slice(0, pos);
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};
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let toBroaderIPv6Address = function(ipaddress) {
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return ipaddress !== '*' && ipaddress !== '' ? '*' : '';
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};
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return function decomposeHostname(hostname, decomposed) {
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if ( decomposed.length === 0 || decomposed[0] !== hostname ) {
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let broaden;
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if ( reHostnameVeryCoarse.test(hostname) === false ) {
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if ( reIPv4VeryCoarse.test(hostname) ) {
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broaden = toBroaderIPv4Address;
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} else if ( hostname.startsWith('[') ) {
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broaden = toBroaderIPv6Address;
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}
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}
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if ( broaden === undefined ) {
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broaden = toBroaderHostname;
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}
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decomposed[0] = hostname;
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let i = 1;
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for (;;) {
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hostname = broaden(hostname);
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if ( hostname === '' ) { break; }
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decomposed[i++] = hostname;
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}
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decomposed.length = i;
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}
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return decomposed;
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};
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})();
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/******************************************************************************/
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// TODO: evaluate using TextEncoder/TextDecoder
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µBlock.orphanizeString = function(s) {
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return JSON.parse(JSON.stringify(s));
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};
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/******************************************************************************/
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// Custom base128 encoder/decoder
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//
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// TODO:
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// Could expand the LZ4 codec API to be able to return UTF8-safe string
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// representation of a compressed buffer, and thus the code below could be
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// moved LZ4 codec-side.
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µBlock.base128 = {
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encode: function(arrbuf, arrlen) {
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const inbuf = new Uint8Array(arrbuf, 0, arrlen);
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const inputLength = arrlen;
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let _7cnt = Math.floor(inputLength / 7);
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let outputLength = _7cnt * 8;
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let _7rem = inputLength % 7;
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if ( _7rem !== 0 ) {
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outputLength += 1 + _7rem;
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}
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const outbuf = new Uint8Array(outputLength);
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let msbits, v;
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let i = 0, j = 0;
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while ( _7cnt-- ) {
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v = inbuf[i+0];
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msbits = (v & 0x80) >>> 7;
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outbuf[j+1] = v & 0x7F;
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v = inbuf[i+1];
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msbits |= (v & 0x80) >>> 6;
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outbuf[j+2] = v & 0x7F;
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v = inbuf[i+2];
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msbits |= (v & 0x80) >>> 5;
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outbuf[j+3] = v & 0x7F;
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v = inbuf[i+3];
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msbits |= (v & 0x80) >>> 4;
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outbuf[j+4] = v & 0x7F;
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v = inbuf[i+4];
|
|
msbits |= (v & 0x80) >>> 3;
|
|
outbuf[j+5] = v & 0x7F;
|
|
v = inbuf[i+5];
|
|
msbits |= (v & 0x80) >>> 2;
|
|
outbuf[j+6] = v & 0x7F;
|
|
v = inbuf[i+6];
|
|
msbits |= (v & 0x80) >>> 1;
|
|
outbuf[j+7] = v & 0x7F;
|
|
outbuf[j+0] = msbits;
|
|
i += 7; j += 8;
|
|
}
|
|
if ( _7rem > 0 ) {
|
|
msbits = 0;
|
|
for ( let ir = 0; ir < _7rem; ir++ ) {
|
|
v = inbuf[i+ir];
|
|
msbits |= (v & 0x80) >>> (7 - ir);
|
|
outbuf[j+ir+1] = v & 0x7F;
|
|
}
|
|
outbuf[j+0] = msbits;
|
|
}
|
|
const textDecoder = new TextDecoder();
|
|
return textDecoder.decode(outbuf);
|
|
},
|
|
// TODO:
|
|
// Surprisingly, there does not seem to be any performance gain when
|
|
// first converting the input string into a Uint8Array through
|
|
// TextEncoder. Investigate again to confirm original findings and
|
|
// to find out whether results have changed. Not using TextEncoder()
|
|
// to create an intermediate input buffer lower peak memory usage
|
|
// at selfie load time.
|
|
//
|
|
// const textEncoder = new TextEncoder();
|
|
// const inbuf = textEncoder.encode(instr);
|
|
// const inputLength = inbuf.byteLength;
|
|
decode: function(instr, arrbuf) {
|
|
const inputLength = instr.length;
|
|
let _8cnt = inputLength >>> 3;
|
|
let outputLength = _8cnt * 7;
|
|
let _8rem = inputLength % 8;
|
|
if ( _8rem !== 0 ) {
|
|
outputLength += _8rem - 1;
|
|
}
|
|
const outbuf = arrbuf instanceof ArrayBuffer === false
|
|
? new Uint8Array(outputLength)
|
|
: new Uint8Array(arrbuf);
|
|
let msbits;
|
|
let i = 0, j = 0;
|
|
while ( _8cnt-- ) {
|
|
msbits = instr.charCodeAt(i+0);
|
|
outbuf[j+0] = msbits << 7 & 0x80 | instr.charCodeAt(i+1);
|
|
outbuf[j+1] = msbits << 6 & 0x80 | instr.charCodeAt(i+2);
|
|
outbuf[j+2] = msbits << 5 & 0x80 | instr.charCodeAt(i+3);
|
|
outbuf[j+3] = msbits << 4 & 0x80 | instr.charCodeAt(i+4);
|
|
outbuf[j+4] = msbits << 3 & 0x80 | instr.charCodeAt(i+5);
|
|
outbuf[j+5] = msbits << 2 & 0x80 | instr.charCodeAt(i+6);
|
|
outbuf[j+6] = msbits << 1 & 0x80 | instr.charCodeAt(i+7);
|
|
i += 8; j += 7;
|
|
}
|
|
if ( _8rem > 1 ) {
|
|
msbits = instr.charCodeAt(i+0);
|
|
for ( let ir = 1; ir < _8rem; ir++ ) {
|
|
outbuf[j+ir-1] = msbits << (8-ir) & 0x80 | instr.charCodeAt(i+ir);
|
|
}
|
|
}
|
|
return outbuf;
|
|
},
|
|
decodeSize: function(instr) {
|
|
const size = (instr.length >>> 3) * 7;
|
|
const rem = instr.length & 7;
|
|
return rem === 0 ? size : size + rem - 1;
|
|
},
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// The requests.json.gz file can be downloaded from:
|
|
// https://cdn.cliqz.com/adblocking/requests_top500.json.gz
|
|
//
|
|
// Which is linked from:
|
|
// https://whotracks.me/blog/adblockers_performance_study.html
|
|
//
|
|
// Copy the file into ./tmp/requests.json.gz
|
|
//
|
|
// If the file is present when you build uBO using `make-[target].sh` from
|
|
// the shell, the resulting package will have `./assets/requests.json`, which
|
|
// will be looked-up by the method below to launch a benchmark session.
|
|
//
|
|
// From uBO's dev console, launch the benchmark:
|
|
// µBlock.staticNetFilteringEngine.benchmark();
|
|
//
|
|
// The advanced setting `consoleLogLevel` must be set to `info` to see the
|
|
// results in uBO's dev console, see:
|
|
// https://github.com/gorhill/uBlock/wiki/Advanced-settings#consoleloglevel
|
|
//
|
|
// The usual browser dev tools can be used to obtain useful profiling
|
|
// data, i.e. start the profiler, call the benchmark method from the
|
|
// console, then stop the profiler when it completes.
|
|
//
|
|
// Keep in mind that the measurements at the blog post above where obtained
|
|
// with ONLY EasyList. The CPU reportedly used was:
|
|
// https://www.cpubenchmark.net/cpu.php?cpu=Intel+Core+i7-6600U+%40+2.60GHz&id=2608
|
|
//
|
|
// Rename ./tmp/requests.json.gz to something else if you no longer want
|
|
// ./assets/requests.json in the build.
|
|
|
|
µBlock.loadBenchmarkDataset = (function() {
|
|
let datasetPromise;
|
|
let ttlTimer;
|
|
|
|
return function() {
|
|
if ( ttlTimer !== undefined ) {
|
|
clearTimeout(ttlTimer);
|
|
ttlTimer = undefined;
|
|
}
|
|
|
|
vAPI.setTimeout(( ) => {
|
|
ttlTimer = undefined;
|
|
datasetPromise = undefined;
|
|
}, 60000);
|
|
|
|
if ( datasetPromise !== undefined ) {
|
|
return datasetPromise;
|
|
}
|
|
|
|
datasetPromise = new Promise(resolve => {
|
|
console.info(`Loading benchmark dataset...`);
|
|
const url = vAPI.getURL('/assets/requests.json');
|
|
µBlock.assets.fetchText(url, details => {
|
|
if ( details.error !== undefined ) {
|
|
datasetPromise = undefined;
|
|
console.info(`Not found: ${url}`);
|
|
resolve();
|
|
return;
|
|
}
|
|
console.info(`Parsing benchmark dataset...`);
|
|
const requests = [];
|
|
const lineIter = new µBlock.LineIterator(details.content);
|
|
while ( lineIter.eot() === false ) {
|
|
let request;
|
|
try {
|
|
request = JSON.parse(lineIter.next());
|
|
} catch(ex) {
|
|
}
|
|
if ( request instanceof Object === false ) { continue; }
|
|
if ( !request.frameUrl || !request.url ) { continue; }
|
|
requests.push(request);
|
|
}
|
|
resolve(requests);
|
|
});
|
|
});
|
|
|
|
return datasetPromise;
|
|
};
|
|
})();
|