Adds a threading option to the GMM algorithm

3 jobs for threading in 62 minutes and 28 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #166387
docker
build_linux_36

00:32:17

62.0%
passed #166527
macosx
build_macosx_36

00:30:11

62.0%
failed #166388
macosx
build_macosx_36

00:11:13