Login | Register   
RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.

Tip of the Day
Language: Perl
Expertise: Intermediate
Jul 20, 2004



Track Process Runtime for Perl Scripts

For any script that takes more than just a few seconds to run, it's always a good idea to track the runtime itself. This is especially useful in the development stage, but it can also be a valuable resource for production scripts that are modified over time. You'd want to know if a recent change doubles your runtime, so maybe you can look for an alternative method. Here's how:

#!/usr/bin/perl -w

# This variable holds the current time #
local $now = time;

# Script processing goes here #
sleep 10;

# Calculate total runtime (current time minus start time) #
$now = time - $now;

# Print runtime #
printf("\n\nTotal running time: %02d:%02d:%02d\n\n", int($now / 3600), int(($now % 3600) / 60), 
int($now % 60));

From here, you can keep a watchful eye on your scripts as they exit, or you can log these times to a file, and only look at them when you're wondering what's been taking so long. Knowing your runtimes helps to prevent inefficient code, and allows you to calculate larger batches.
Jaime Bellmyer
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



Thanks for your registration, follow us on our social networks to keep up-to-date