#Php sleep performance code

PHP sleep or PHP usleep?įor pausing PHP anything under a second or usleep for anything over a second use sleep.

OpCache is compiled by default on PHP 5.5+. So tracking these grounds, the importance of Opcache cannot be ignored. If interrupted by a signal, the function will return the total number of seconds remaining in the sleep cycle. Conducting the PHP performance test after integrating Opcache, some experts claim that PHP performance will be 3x faster and the load time will reduce much impressively.

#Php sleep performance code

The sleep function on success return int zero, which follows exit code 0. In order to sleep for 0.5 seconds, you instead, you need a function called usleep, to do such things. Therefore, setting the seconds to 0.5 will pause the script for no seconds, effectively doing nothing. With PHP sleep you can't pause the execution in microseconds, due to the function expecting a whole number above 0. If you wanted to pause your PHP script by 5 seconds or 1 second you would add the following to your codebase. Sleep function requires one parameter, an int, which is the amount of time in seconds that you want to halt the execution. It can be used anywhere in the codebase including loops. Using PHP sleep will delay the execution of your script until the time specified has passed. This is used in an algorithm technique called exponential backoff, where you slowly increase the sleep time of each call before stopping the requests altogether. Instead of killing or letting your script run to an end, without having to spawn another PHP process to try again, you could, keep the same script running but pause its output. They might reject your request, so, you'll have to re-try the request again at another time. Both functions are supported by PHP 4 and. Let's say you have sent data via an API to an external service that is undergoing a heavy load. The sleep() function will delay the scripts execution in seconds while usleep() will delay it in microseconds. However, there are times with APIs when data cannot be processed as instantly as you'd like, or in another way, cannot be processed immediately as you send it over. Using an API or building your own one and letting someone else use it is a great way to send data from one place to another.

An API (application programming interface) allows you to connect one system to another via a common set of rule sets. One example of using PHP sleep is using an API. Let's explore why this might be the case. However, there are times when you might need to temporarily pause the execution of the PHP script you're running. One way that can be achieved is breaking out of a loop early in PHP once you've finished processing the loop data. Performance can hurt the user experience, that's why it's generally good programming practice to adopt a methodology code efficiently. Whether that be via the command line to batch process something or a user visiting or website. In nearly all cases this is what you want. Running your PHP scripts is an instant job, which means running as fast as possible.