Hi https://wiki.asterisk.org/wiki/display/AST/Getting+a+Backtrace reads:
| Running a production server with DONT_OPTIMIZE is generally safe. You'll | notice the binary files may be a bit larger, but in terms of Asterisk | performance, impact should be negligible. The effect of DONT_OPTIMIZE is setting the optimization build flag to -O0 (rather than -O6). As a side note, recent versions of gcc (4.8) have -Og: | Optimize debugging experience. -Og enables optimizations that do not | interfere with debugging. It should be the optimization level of choice | for the standard edit-compile-debug cycle, offering a reasonable level | of optimization while maintaining fast compilation and a good debugging | experience. It would probably be better than -O0, if available (thanks ot Tim_Today on #asterisk-dev). Common wisdom is that optimization level does impact performance. Consider the following (pathalogical, though) example: $ cat /tmp/test.c int main() { int i; for(i=1; i<100000000; i++) ; return 0; } $ gcc -O0 /tmp/test.c -o /tmp/test; time /tmp/test real 0m0.214s user 0m0.212s sys 0m0.000s $ gcc -O2 /tmp/test.c -o /tmp/test; time /tmp/test real 0m0.001s user 0m0.000s sys 0m0.000s The unoptimized version would have indeed preserved the code. But I want the compiler to provide me with better performance. A simple artificial test shows a noticable (-40% or so) performance penalty on the following loop: exten => time,n,Set(i=100000) exten => time,n,While($[${i} > 0]) exten => time,n,Set(i=$[${i} - 1]) exten => time,n,EndWhile So I wonder if Asterisk's performance is that much not CPU bound that the effect of a similar penalty will be negligible. Any numbers? -- Tzafrir Cohen icq#16849755 jabber:tzafrir.co...@xorcom.com +972-50-7952406 mailto:tzafrir.co...@xorcom.com http://www.xorcom.com -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-dev mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-dev