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c2a51b0cf1
busybox/archival
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Denys Vlasenko c2a51b0cf1 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>
2018-02-05 00:34:08 +01:00
..
libarchive bzip2: work around bad compiler optimization 2018-02-05 00:34:08 +01:00
ar.c regularize format of source file headers, no code changes 2017-09-18 16:28:43 +02:00
bbunzip_test2.sh add tests for gunzip 2007-10-05 15:27:03 +00:00
bbunzip_test3.sh add tests for gunzip 2007-10-05 15:27:03 +00:00
bbunzip_test.sh add tests for gunzip 2007-10-05 15:27:03 +00:00
bbunzip.c libarchive: move bbunpack constants to bb_archive.h 2018-02-01 09:13:14 +01:00
bzip2.c libarchive: move bbunpack constants to bb_archive.h 2018-02-01 09:13:14 +01:00
Config.src config: deindent all help texts 2017-07-21 09:50:55 +02:00
cpio.c regularize format of source file headers, no code changes 2017-09-18 16:28:43 +02:00
dpkg_deb.c regularize format of source file headers, no code changes 2017-09-18 16:28:43 +02:00
dpkg.c regularize format of source file headers, no code changes 2017-09-18 16:28:43 +02:00
gzip.c libbb: commonalize a bit of little-endian CRC32 table generation code 2018-02-01 10:56:19 +01:00
Kbuild.src cpio: implement -R/--owner 2015-10-16 17:24:46 +02:00
lzop.c libbb: commonalize a bit of little-endian CRC32 table generation code 2018-02-01 10:56:19 +01:00
rpm.c rpm,rpm2cpio: do not compile not-configurred parts of rpm.c 2017-08-22 15:33:04 +02:00
rpm.h *: make GNU licensing statement forms more regular 2010-08-16 20:14:46 +02:00
tar_symlink_attack tar: postpone creation of symlinks with "suspicious" targets. Closes 8411 2017-07-24 17:20:13 +02:00
tar.c tar: code shrink 2017-11-13 01:56:51 +01:00
unzip.c unzip: add missing -j to trivial usage 2017-11-09 12:47:56 +01:00