diff options
Diffstat (limited to 'archival/bzip2.c')
| -rw-r--r-- | archival/bzip2.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/archival/bzip2.c b/archival/bzip2.c index fa90615..357891c 100644 --- a/archival/bzip2.c +++ b/archival/bzip2.c @@ -19,6 +19,23 @@ //config: Unless you have a specific application which requires bzip2, you //config: should probably say N here. //config: +//config:config BZIP2_SMALL +//config: int "Trade bytes for speed (0:fast, 9:small)" +//config: default 8 # all "fast or small" options default to small +//config: range 0 9 +//config: depends on BZIP2 +//config: help +//config: Trade code size versus speed. +//config: Approximate values with gcc-6.3.0 "bzip -9" compressing +//config: linux-4.15.tar were: +//config: value time (sec) code size (386) +//config: 9 (smallest) 70.11 7687 +//config: 8 67.93 8091 +//config: 7 67.88 8405 +//config: 6 67.78 8624 +//config: 5 67.05 9427 +//config: 4-0 (fastest) 64.14 12083 +//config: //config:config FEATURE_BZIP2_DECOMPRESS //config: bool "Enable decompression" //config: default y @@ -48,7 +65,11 @@ #include "libbb.h" #include "bb_archive.h" -#define CONFIG_BZIP2_FAST 1 +#if CONFIG_BZIP2_SMALL >= 4 +#define BZIP2_SPEED (9 - CONFIG_BZIP2_SMALL) +#else +#define BZIP2_SPEED 5 +#endif /* Speed test: * Compiled with gcc 4.2.1, run on Athlon 64 1800 MHz (512K L2 cache). @@ -56,7 +77,7 @@ * (time to compress gcc-4.2.1.tar is 126.4% compared to bbox). * At SPEED 5 difference is 32.7%. * - * Test run of all CONFIG_BZIP2_FAST values on a 11Mb text file: + * Test run of all BZIP2_SPEED values on a 11Mb text file: * Size Time (3 runs) * 0: 10828 4.145 4.146 4.148 * 1: 11097 3.845 3.860 3.861 |