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Quick tip: clone of PHP’s microtime() function as a Perl subroutine.

Refer to the PHP manual for how the function is supposed to work. The short version is that you call “microtime(1)” to get this perl subroutine to return a float-formatted value containing the seconds and microseconds since the unix epoch.

	# Clone of PHP's microtime. - from
	use Time::HiRes qw(gettimeofday);
	sub microtime{
		my $asFloat = 0;
			$asFloat = shift;
		(my $epochseconds, my $microseconds) = gettimeofday;
			while(length("$microseconds") < 6){
				$microseconds = "0$microseconds";
			$microtime = "$epochseconds.$microseconds";
		} else {
			$microtime = "$epochseconds $microseconds";
		return $microtime;

This is public domain, use it as you’d like. Please let me know if you find any bugs.

Hope it helps!

Category: quickTip
  • Pradeep says:

    Two comments/suggestions,

    1. How about fetching the time immediately entering into the function (and before doing anyother calculation/assignment). This will get the time as close as possible to the moment we we called the function.
    sub microtime {
    (my $epochseconds, my $microseconds) = gettimeofday;
    my $asFloat = 0;

    2. How about using sprintf and padding zeroes instead of using while loop?

    September 8, 2010 at 4:50 am

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