[issue28106] [Benchmarks] Add --testonly argument to perf.py to run benchmarks only for correctness checking

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka+cpython at gmail.com>:


----------
nosy: +haypo

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28106>
_______________________________________