diff --git a/Memory-footprint:-what-happens-inside-µBlock-after-installation.md b/Memory-footprint:-what-happens-inside-µBlock-after-installation.md
index c8ad386..a67b7b7 100644
--- a/Memory-footprint:-what-happens-inside-µBlock-after-installation.md
+++ b/Memory-footprint:-what-happens-inside-µBlock-after-installation.md
@@ -6,6 +6,7 @@
     - This will causes another round of short-term memory churning, which short-term memory will be garbage-collected eventually
     - Again, all this short term memory churning causes µBlock's baseline memory footprint to grow further
 1. After **seven minutes**, assuming no change in selection of filter lists, or change in the content of selected filter lists, µBlock will make a selfie
+    - A selfie allows µBlock to skip the parsing/sorting of data, a typically CPU and memory intensive operation
     - Generating the selfie also causes short-term memory churning, which short-term memory will be garbage-collected eventually
     - Again, this short term memory churning causes µBlock's baseline memory footprint to grow further
     - Any change in the selection of filter lists, or change in the content of selected filter lists will invalidate µBlock's selfie