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Jeff Davis 1fbb6c93df 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
2020-06-07 09:25:55 -07:00
..
backend Fix platform-specific performance regression in logtape.c. 2020-06-07 09:25:55 -07:00
bin psql: Format \? output a little better 2020-06-07 16:12:05 +02:00
common Run pgindent with new pg_bsd_indent version 2.1.1. 2020-05-16 11:54:51 -04:00
fe_utils Add SQL type xid8 to expose FullTransactionId to users. 2020-04-07 12:03:59 +12:00
include Spelling adjustments 2020-06-07 15:06:51 +02:00
interfaces Message wording tweaks 2020-05-26 15:58:39 +02:00
makefiles Remove libpq.rc, use win32ver.rc for libpq 2020-01-15 15:06:12 +01:00
pl Clear some style deviations. 2020-05-21 08:31:16 -07:00
port Clear some style deviations. 2020-05-21 08:31:16 -07:00
template Fix compiler warning for ppoll() on Cygwin 2019-12-22 23:20:00 +01:00
test Spelling adjustments 2020-06-07 15:06:51 +02:00
timezone Run pgindent with new pg_bsd_indent version 2.1.1. 2020-05-16 11:54:51 -04:00
tools Refresh function name in CRC-associated Valgrind suppressions. 2020-06-05 20:10:53 -07:00
tutorial Update copyrights for 2020 2020-01-01 12:21:45 -05:00
.gitignore
DEVELOPERS
Makefile Fix partial-build problems introduced by having more generated headers. 2018-04-09 16:42:10 -04:00
Makefile.global.in Update Unicode data to Unicode 13.0.0 and CLDR 37 2020-04-24 09:52:59 +02:00
Makefile.shlib Add PostgreSQL home page to --help output 2020-02-28 13:12:21 +01:00
nls-global.mk NLS: Fix backend gettext triggers 2019-09-23 09:04:20 +02:00