Is strace itself impact the running application?

[Noah Yan]

Dear Sir/Madam,

We are trying to use strace mechnanism to monitor and report system call
usage of a application. We want to know first, how strace itself impact
the execution time? Is it an expensive overhead to trace those system
calls and signals? In short, what appoximately the execution time difference for
an application if we use strace and if we not use it?

Thanks very much

Noah Yan
Department of Computer Science
University of Houston
http://www.cs.uh.edu/~yanyh