4 Commits (11775edbfc27d2ad1cd0dff3f7af385f67719866)

Author	SHA1	Message	Date
Denys Vlasenko	04c1417602	libbb: use ARG_MAX for bb_arg_max() only if it's 60k+ ... Sometimes ARG_MAX is small (like 32k) yet sysconf(_SC_ARG_MAX) is big, and people prefer using the bigger value. OTOH, with sufficiently large ARG_MAX, further wins from sysconf(_SC_ARG_MAX) being bigger are exponentially smaller: you can see 4 times fewer fork+execs when you run find, but when each execed process already takes a thousand parameters it's likely execution time is dominated by what that process does with each parameter. Thus, with this change ARG_MAX is used if it's sufficiently big, otherwise sysconf(_SC_ARG_MAX) is used. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>	2014-11-26 15:17:59 +01:00
Denys Vlasenko	5aeae36e2b	libbb: fix compile failure if both ARG_MAX and _SC_ARG_MAX are defined ... Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>	2014-06-25 15:39:27 +02:00
Bartosz Golaszewski	5d2e409ef8	libbb: use a wrapper around sysconf(_SC_CLK_TCK) to save a few bytes ... function old new delta bb_sc_clk_tck - 10 +10 timescmd 118 113 -5 print_route 1763 1758 -5 mpstat_main 1288 1283 -5 iostat_main 1947 1942 -5 INET_setroute 879 871 -8 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/5 up/down: 10/-28) Total: -18 bytes Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>	2014-06-22 14:01:13 +02:00
Denys Vlasenko	f92f1d0181	find: use sysconf(_SC_ARG_MAX) to determine the command-line size limit ... The find utility uses a hardcoded value of 32 * 1024 as the limit of the command-line length when calling 'find -exec ... {} +'. This results in over 4 times more execve() calls than in coreutils' find. This patch uses the limit defined in system headers. Based on the patch by Bartosz Golaszewski <bartekgola@gmail.com>. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>	2014-06-22 13:54:40 +02:00