diff options
Diffstat (limited to 'morphlib/util.py')
| -rw-r--r-- | morphlib/util.py | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/morphlib/util.py b/morphlib/util.py index e34799df..ec83df25 100644 --- a/morphlib/util.py +++ b/morphlib/util.py @@ -93,10 +93,12 @@ def make_concurrency(cores=None): ''' n = cpu_count() if cores is None else cores - # Experimental results (ref. Kinnison) says a factor of 1.5 - # gives about the optimal result for build times, since much of - # builds are I/O bound, not CPU bound. - return max(int(n * 1.5 + 0.5), 1) + # Research shows that max-jobs should be == cores by default, up to max. + # 20 cores. + # + # http://listmaster.pepperfish.net/pipermail/ + # baserock-dev-baserock.org/2015-September/013264.html + return min(n, 20) def create_cachedir(settings): # pragma: no cover |