Brave refurbishes Rust adblock engine for memory gain

Brave browser reduced its adblock engine memory footprint by 75% through Rust refactoring, dropping from 162 MB to 104 MB. The improvements came from adopting FlatBuffers for zero-copy serialization, stack-allocated vectors, and optimized resource storage. This translates to roughly 45 MB memory savings across all platforms, improving battery life and multitasking. Rust's memory safety guarantees also enhance browser security by eliminating entire classes of bugs.