# Fix: whisper.cpp (whisper-rs-sys) is configured by the cmake crate, which # hardcodes opt_level(0) and overwrites CMake's default MSVC Release flags # (/O2 /Ob2 /DNDEBUG) with unoptimized ones — ggml's CPU kernels were compiled # at /Od with asserts on, making CPU-only transcription ~40x slower than real # time (bench finding W1, docs/benchmarks/2026-07-parakeet-vs-whisper.md). # cc-rs appends these env flags after its own, so they win for every native # dep. MSVC-only flags are fine: WhispAssist is a Windows-native app. [env] CFLAGS = "/O2 /DNDEBUG" CXXFLAGS = "/O2 /DNDEBUG"