r266164 - in /trunk/libstdc++-v3: ChangeLog scr...

[redi@gcc.gnu.org]

Author: redi
Date: Thu Nov 15 00:04:19 2018
New Revision: 266164

URL: https://gcc.gnu.org/viewcvs?rev=266164&root=gcc&view=rev
Log:
Optimize pool resource allocation

A recent change caused a performance regression. This restores the
previous performance and adds a performance test.

	* scripts/check_performance: Allow tests to choose a -std flag.
	* src/c++17/memory_resource.cc (bitset::get_first_unset()): Use local
	variables of the right types. Call update_next_word() unconditionally.
	* testsuite/20_util/unsynchronized_pool_resource/cons.cc: New test.
	* testsuite/performance/20_util/memory_resource/pools.cc: New test.
	* testsuite/util/testsuite_performance.h (time_counter): Allow
	timer to be restarted.

Added:
    trunk/libstdc++-v3/testsuite/20_util/unsynchronized_pool_resource/cons.cc
    trunk/libstdc++-v3/testsuite/performance/20_util/
    trunk/libstdc++-v3/testsuite/performance/20_util/memory_resource/
    trunk/libstdc++-v3/testsuite/performance/20_util/memory_resource/pools.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/scripts/check_performance
    trunk/libstdc++-v3/src/c++17/memory_resource.cc
    trunk/libstdc++-v3/testsuite/util/testsuite_performance.h