https://sourceware.org/bugzilla/show_bug.cgi?id=30724
Bug ID: 30724
Summary: massive ld performance regression
Product: binutils
Version: 2.41
Status: UNCONFIRMED
Severity: critical
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: Stromeko at nexgo dot de
Target Milestone: ---
On Cygwin there is a massive performance regression during the link phase with
version 2.41. The degradation is superlinear in the number of objects involved
and I have observed link operations that take more than 30× longer than with
the previous version.
One of the changes suspected was 38395c77, but that doesn't seem to be the main
contributor to the regression (at least not in isolation).
* cygport protobuf-21.12 compile
2.39: 1420.820u 143.747s 3:20.37 780.8% 0+0k 0+0io 41531073pf+0w
2.40: 1429.088u 140.548s 3:18.48 790.8% 0+0k 0+0io 41615637pf+0w
2.41: 1496.555u 524.457s 10:07.31 332.7% 0+0k 0+0io 41570112pf+0w
* only the linking of protobuf-21.12
2.39: 14.212u 2.614s 0:20.54 81.8% 0+0k 0+0io 1909884pf+0w
2.40: 13.371u 0.839s 0:20.46 69.4% 0+0k 0+0io 1910885pf+0w
2.41: 85.507u 373.960s 7:55.39 96.6% 0+0k 0+0io 1905021pf+0w
38395c77/pdb.c w/o call to qsort
84.933u 363.715s 7:37.01 98.1% 0+0k 0+0io 1906464pf+0w
38395c77/pdb.c full revert
82.964u 361.461s 7:30.39 98.6% 0+0k 0+0io 1906266pf+0w
--
You are receiving this mail because:
You are on the CC list for the bug.
