Optimize regexp memory usage
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atuchin-m commented
From brave/brave-browser#21603 (comment)
Adblock filters take +40Mb (Private Memory Footprint) even without extra filters.
Most of that memory is consumed by heap allocation with the stack brave/brave-browser#21603 (comment)
35MB is taken by HashMaps that store NetworkFilter. Each NetworkFilter takes ~400 bytes which looks much more than the text version.
The most expensive field is regexp.