C++ lead and compiler engineer on Apple`s clang team. Former compiler engineer on WebKit`s JavaScriptCore. Former compiler engineer on Google Chrome, contributing to , , , . I make things fast by tuning assembly, SIMD, concurrency, and teach the compiler to do the same. I`m actively involved in the C++ standard committee`s concurrency and parallelism group /SG1, on WebAssembly, and JavaScript. ©