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[Bug c++/15036] [3.4 regression] Performance and code size regression compared to 3.3
- From: "digitalmastrmind at hotmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 17 Sep 2004 23:23:57 -0000
- Subject: [Bug c++/15036] [3.4 regression] Performance and code size regression compared to 3.3
- References: <20040421083201.15036.martin@mpa-garching.mpg.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From digitalmastrmind at hotmail dot com 2004-09-17 23:23 -------
(In reply to comment #7)
Started the build this morning, tried my simplistic benchmark tonight with the
new GCC build...
Thanks, this appears to have done a small miracle and made 3.4.2 5-10% faster
than my 3.3.4 was... but it still lags ~5% behind 3.2.2 for hash_set though.
(that 3.2.2 is from stock/up2date RH9 packages, the others are from sources
with -O2 for GCC and -O2 -g for C/C++ libs.)
Does this mean that allocator pool used to be the default in 3.3.x and this
behavior got dropped along the way to 3.4.x? (this certainly is what comparing
the 3.3.4 c++configure.h file with the 3.4.2 version is hinting - I would be
curious to read the reason(s).)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15036