f z wrote: > Hi everyone, > I test some code and I found that "next 'try-throw-catch' will cost more cpu time than previous one". Could you help to explain this case !! Try using clock(3) instead of gettimeofday(2). I see quite a lot of variation in the time taken: sometimes slower, sometimes faster. I'm not sure what causes this variation, and you'd have to use oprofile or something similar to find out. Some variation is inevitable, due to the OS process scheduling. Andrew. start0:0 end 0:13320000 totle0:13320000 ****************** start1:13320000 end 1:28000000 totle1:14680000 ****************** start2:28000000 end 2:43870000 totle2:15870000 ****************** start3:43870000 end 3:61100000 totle3:17230000 ****************** start0:61100000 end 0:74440000 totle0:13340000 ****************** start1:74440000 end 1:89120000 totle1:14680000 ****************** start2:89120000 end 2:104980000 totle2:15860000 ****************** start3:104980000 end 3:122200000 totle3:17220000 ****************** start0:122200000 end 0:135560000 totle0:13360000 ****************** start1:135560000 end 1:150250000 totle1:14690000 ****************** start2:150250000
