Measuring resource usage
Posted: Wed May 14, 2014 4:51 pm
CGI is an uncommonly harsh environment, with the entire runtime life cycle happening in the time it takes to satisfy an HTTP request. So I tend to take great care in measuring both CPU time and memory with CGI scripts, but I've found it difficult to get accurate measurements in the server environment.
One commonly-recommended method is to use the "time" program, with the --verbose option to include memory
It seems on many systems that time program is implemented in an incomplete way, showing artificially low values for memory usage.
top might seem a good option, but in practice it's useless since even its tightest update frequency is less than the execution time of my scripts.
Any suggestions for something like /usr/bin/time but is actually reliable, something I can attach to the command line call for an accurate measurement of both time and memory?
One commonly-recommended method is to use the "time" program, with the --verbose option to include memory
Code: Select all
/usr/bin/time --verbose ./livecode-server somescriptfile.lctop might seem a good option, but in practice it's useless since even its tightest update frequency is less than the execution time of my scripts.
Any suggestions for something like /usr/bin/time but is actually reliable, something I can attach to the command line call for an accurate measurement of both time and memory?