Compiling the SIMD version of python-rapidjson

A recent task had me taking a look at alternative JSON libraries for the purpose of performance. One of them was python-rapidjson which offered support for SIMD.


The chosen flag would then need to be passed to pip during install via CFLAGS. Depending on the flag, you would have to pass some addition options.

  • SSE4.2: CFLAGS="-DRAPIDJSON_SSE42=1 -msse4.2"

One-liner to re-install the currently installed version as the SIMD version.

CFLAGS="-DRAPIDJSON_SSE42=1 -msse4.2" pip -v install -force-reinstall -no-binary python-rapidjson $(pip freeze | grep python-rapidjson)

The Adventures of Me

The Adventures of Me