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When I test a perl script under linux and use time sh -c to measure the time spent, I got a weird result:
real 14m11.903s
user 34m39.319s
sys 16m54.074s
which means the real time spent is even less than user time. And visually counting the time by myself, the script didn’t spent as much as 34 minutes, and real time is closer to what I see. Has anyone have any clue about this? Thanks.
The script could have used more than 1 core.