My application is CGI script that works with SQLite and does a lot of text manipulation works.
Of course i need wall clock to know is it my script works so slowly or it is slow network throughput.
If script works slowly, then i will know that i need to do some code optimization.
But if i got situation where real time is much more bigger than sys+real time. What to do in this case? And is it possible case? If I understand correctly it's possible at case where CPU is busy by other process or my process is sleeping on I/O system calls. If it's true - robust timer should include all three number - real, system and user times. Am i right?