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path: root/archival/libarchive/bz/compress.c
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2018-02-07bzip2: expose tuning knob for faster/smaller codeDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-05bzip2: work around bad compiler optimizationDenys Vlasenko
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>
2018-02-03bzip2: move ->origPtr out of struct EState, make a few members smallerDenys Vlasenko
function old new delta BZ2_compressBlock 223 228 +5 BZ2_blockSort 85 88 +3 generateMTFValues 356 357 +1 handle_compress 355 349 -6 compressStream 538 531 -7 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/2 up/down: 9/-13) Total: -4 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-03bzip2: reduce indentation, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-03bzip2: reuse zPend processing codeDenys Vlasenko
function old new delta generateMTFValues 378 357 -21 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-03bzip2: shrink makeMaps_e()Denys Vlasenko
function old new delta generateMTFValues 378 368 -10 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-03bzip2: optimize zPend variable codeDenys Vlasenko
function old new delta generateMTFValues 433 378 -55 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-03bzip2: have two separate "store bit 0" and "store bit 1" functionsDenys Vlasenko
function old new delta sendMTFValues 2051 2085 +34 bsW1_0 - 33 +33 BZ2_compressBlock 225 223 -2 bsW1 52 - -52 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 1/1 up/down: 67/-54) Total: 13 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-03bzip2: ~1% speedup by special-casing "store 1 bit" functionDenys Vlasenko
function old new delta bsW1 - 52 +52 BZ2_compressBlock 230 225 -5 BZ2_blockSort 125 118 -7 sendMTFValues 2070 2051 -19 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/3 up/down: 52/-31) Total: 21 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-03bzip2: rewrite bit of code which depends on integer overflowDenys Vlasenko
function old new delta sendMTFValues 2093 2070 -23 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-03bzip2: delete write-only fave[] arrayDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-03bgip2: fewer specifically-sized [u]int32_t's locals in sendMTFValuesDenys Vlasenko
Generic ints/unsigneds are usually fine. Yes, really. function old new delta sendMTFValues 2100 2093 -7 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-03bzip2: code shrinkDenys Vlasenko
function old new delta sendMTFValues 2111 2100 -11 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-03bzip2: code shrinkDenys Vlasenko
function old new delta BZ2_compressBlock 225 230 +5 handle_compress 356 355 -1 bsW16 59 56 -3 bsW 64 61 -3 bsFinishWrite 37 32 -5 prepare_new_block 48 34 -14 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/5 up/down: 5/-26) Total: -21 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-02bzip2: code shrinkDenys Vlasenko
function old new delta bsW16 - 59 +59 sendMTFValues 2116 2111 -5 bsPutU16 36 - -36 bsPutU32 76 31 -45 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 0/2 up/down: 59/-86) Total: -27 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-07-13Removes stray empty line from codeManinder Singh
This patch removes stray empty line from busybox code reported by script find_stray_empty_lines Signed-off-by: Maninder Singh <maninder1.s@samsung.com> Signed-off-by: Akhilesh Kumar <akhilesh.k@samsung.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2013-11-29fix assorted unused code and wrong format specs found by cppchekc (bug 6716)Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2013-10-16Fix some compiler warnings emitted by gcc-4.8.0Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2011-09-10regularize options which control size/speed tradeDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2011-05-13fix "variable 'foo' set but not used" warningsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-11-03rename archival/libunarchive -> archival/libarchive; move bz/ into itDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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