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| author | Denys Vlasenko | 2018-02-05 00:34:08 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2018-02-05 00:34:08 +0100 |
| commit | c2a51b0cf16918482c993c4998a2a920e499a43f (patch) | |
| tree | f138a8f9dfc180c60446e682ab4436c3bdfad127 /libbb | |
| parent | f75a7c04397b8b3409b5c4f5a4438654b6b830ce (diff) | |
| download | busybox-c2a51b0cf16918482c993c4998a2a920e499a43f.zip busybox-c2a51b0cf16918482c993c4998a2a920e499a43f.tar.gz | |
bzip2: work around bad compiler optimization
gc-6.1.1 x86_64:
function old new delta
generateMTFValues 380 367 -13
gcc-4.3.1 386:
function old new delta
inner_loop - 41 +41
generateMTFValues 357 294 -63
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 41/-63) Total: -22 bytes
gcc-6.3.0 386:
function old new delta
inner_loop - 36 +36
generateMTFValues 363 250 -113
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 36/-113) Total: -77 bytes
The last case, gcc-6.3.0, runs almost 3 times faster after this change.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb')
0 files changed, 0 insertions, 0 deletions