[Bug c++/81476] New: severe slow-down with range-v3 library compared to clang
h2+bugs at fsfe dot org
gcc-bugzilla@gcc.gnu.org
Tue Jul 18 14:42:00 GMT 2017
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81476
Bug ID: 81476
Summary: severe slow-down with range-v3 library compared to
clang
Product: gcc
Version: 7.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: h2+bugs at fsfe dot org
Target Milestone: ---
The small example posted on github illustrates severe slow-downs compared with
clang:
https://github.com/ericniebler/range-v3/issues/700#issuecomment-316050266
GCC is roughly
40x slower than Clang on -O3,
33x slower on -O1, and
10x slower on -O0
I have tested this on g++6 and current snapshots of 7 and 8.
Thanks for your help!
More information about the Gcc-bugs
mailing list