From: yangfl <yangfl@users.noreply.github.com>
Date: Sat, 20 Oct 2018 02:04:22 +0800
Subject: Get cythonize parallelization from environment

Instead of hard-coding to the CPU count, get the number of jobs for the JOBS
env var (eg: set in debian/rules), defaulting to 1 if it is not set.

Last-Update: 2020-02-13
---
 sklearn/_build_utils/__init__.py | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

--- a/sklearn/_build_utils/__init__.py
+++ b/sklearn/_build_utils/__init__.py
@@ -60,11 +60,7 @@
     #   to actually build the compiled extensions with OpenMP flags if needed.
     sklearn._OPENMP_SUPPORTED = check_openmp_support()
 
-    n_jobs = 1
-    with contextlib.suppress(ImportError):
-        import joblib
-
-        n_jobs = joblib.cpu_count()
+    n_jobs = int(os.environ.get('JOBS', 1))
 
     # Additional checks for Cython
     cython_enable_debug_directives = (