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Cache and reuse result of HNTrieRef.matches() when possible

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Due to how web pages typically load secondary resources and due
to how HNTrieContainer instances are used in uBO, there is a
great likelihood that the result of a previous call to
HNTrieRef.matches() can be reused in a subsequent call.
This has been confirmed by instrumenting HNTrieRef.matches().

Since uBO uses distinct HNTrieContainer instances to either
match against the request or the origin hostnames, this
means a high likelihood of repeated calls to HNTrieRef.matches()
with the same hostname as argument, hence a performance gain
when caching the argument+result -- as despite that
HNTrie.matches() is fast, comparing two short strings is even
faster if this allows to skip HNTrie.matches() altogether.
This commit is contained in:
Raymond Hill 2019-04-25 18:36:03 -04:00
parent 99390390fc
commit 155abfba18
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GPG key ID: 25E1490B761470C2
1 changed files with 23 additions and 3 deletions
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26
src/js/hntrie.js
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@ -407,6 +407,8 @@ HNTrieContainer.prototype = {
this.container = container;
this.iroot = iroot;
this.size = size;
this.last = -1;
this.needle = '';
},
//--------------------------------------------------------------------------
@ -548,6 +550,8 @@ HNTrieContainer.prototype = {
HNTrieContainer.prototype.HNTrieRef.prototype = {
add: function(hn) {
if ( this.container.setNeedle(hn).add(this.iroot) === 1 ) {
this.last = -1;
this.needle = '';
this.size += 1;
return true;
}
@ -555,6 +559,8 @@ HNTrieContainer.prototype.HNTrieRef.prototype = {
},
addJS: function(hn) {
if ( this.container.setNeedle(hn).addJS(this.iroot) === 1 ) {
this.last = -1;
this.needle = '';
this.size += 1;
return true;
}
@ -562,19 +568,33 @@ HNTrieContainer.prototype.HNTrieRef.prototype = {
},
addWASM: function(hn) {
if ( this.container.setNeedle(hn).addWASM(this.iroot) === 1 ) {
this.last = -1;
this.needle = '';
this.size += 1;
return true;
}
return false;
},
matches: function(needle) {
return this.container.setNeedle(needle).matches(this.iroot);
if ( needle !== this.needle ) {
this.needle = needle;
this.last = this.container.setNeedle(needle).matches(this.iroot);
}
return this.last;
},
matchesJS: function(needle) {
return this.container.setNeedle(needle).matchesJS(this.iroot);
if ( needle !== this.needle ) {
this.needle = needle;
this.last = this.container.setNeedle(needle).matchesJS(this.iroot);
}
return this.last;
},
matchesWASM: function(needle) {
return this.container.setNeedle(needle).matchesWASM(this.iroot);
if ( needle !== this.needle ) {
this.needle = needle;
this.last = this.container.setNeedle(needle).matchesWASM(this.iroot);
}
return this.last;
},
[Symbol.iterator]: function() {
return {