Fastcomp backend was introduced here: 14b18697e6 Emscripten changelog: https://emscripten.org/docs/introducing_emscripten/release_notes.html?highlight=2.0.0:%2008/10/2020 Emscripten issue: https://github.com/emscripten-core/emsdk/pull/590 Updated CHANGELOG.txt
14b18697e6