Quake Wang focused on performance optimization for the fastrepl/hyprnote repository, addressing macOS build efficiency across aarch64 and x86_64 architectures. He implemented architecture-aware Cargo feature gating in TOML, configuring dependencies such as crates/llama, crates/whisper, and plugins/local-stt to enable or disable Metal support based on hardware capabilities. This approach reduced unnecessary overhead on x86_64 macOS and resolved a specific performance regression. By stabilizing cross-architecture builds and tailoring system configuration, Quake improved both performance consistency and resource usage. His work demonstrated depth in performance optimization and dependency management, leveraging Rust and TOML to address platform-specific challenges in a targeted manner.