[Bug libstdc++/115433] New: unexpected increase of testsuite execution time

["jbeulich at suse dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115433

            Bug ID: 115433
           Summary: unexpected increase of testsuite execution time
           Product: gcc
           Version: 14.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jbeulich at suse dot com
  Target Milestone: ---

With the usual, moderate increase of the number of tests it is somewhat
unexpected that a testsuite run now takes 50% more time for x86-64 targets, and
about 100% more for i686 targets (and there already with a 64-bit kernel
underneath). For comparison, taking a representative 64-bit system, testsuite
runs took
- gcc: a little over an hour
- g++: less than 40 min
- libstdc++: 3 hours
IOW what already took longest before has now further increased by a significant
percentage. (Absolute numbers are bigger on two or three generations older
hardware, but the relative values remain largely the same.)

All of this said - I certainly understand that moderate increases of overall
execution time is always to be expected for a new major release. It's just that
this time it's not quite "moderate" anymore.