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| author | Jeff Davis <jdavis@postgresql.org> | 2020-06-07 09:14:24 -0700 |
|---|---|---|
| committer | Jeff Davis <jdavis@postgresql.org> | 2020-06-07 09:25:55 -0700 |
| commit | 1fbb6c93df30801f83c6804ab7befde3cdefe677 (patch) | |
| tree | 8c136b2642614ef2e626cccdd11925293416ac35 /src/bin/scripts/scripts_parallel.c | |
| parent | aa7927698acb813283d21aa6a47a67cd3c5a8b0c (diff) | |
| download | postgresql-1fbb6c93df30801f83c6804ab7befde3cdefe677.tar.gz postgresql-1fbb6c93df30801f83c6804ab7befde3cdefe677.zip | |
Fix platform-specific performance regression in logtape.c.
Commit 24d85952 made a change that indirectly caused a performance
regression by triggering a change in the way GCC optimizes memcpy() on
some platforms.
The behavior seemed to contradict a GCC document, so I filed a report:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95556
This patch implements a narrow workaround which eliminates the
regression I observed. The workaround is benign enough that it seems
unlikely to cause a different regression on another platform.
Discussion: https://postgr.es/m/99b2eab335c1592c925d8143979c8e9e81e1575f.camel@j-davis.com
Diffstat (limited to 'src/bin/scripts/scripts_parallel.c')
0 files changed, 0 insertions, 0 deletions