Php Microtime

This is a handy little snippet of code for any one that is trying to optimize there code. I just used this in my Addressbook to see how the pages were loading.
microtime — Return current Unix timestamp with microseconds

There isn’t much to this script, we are going to assign $time-start with a value (start time). Then we would place your code you want to time next. Once the script has executed we then assign a value to $time-end. Simple math will tell us that subtracting $time-start from $time-end will give us the difference, Thus your execution time.

$time-start = microtime(true);

// Code Here

$time-end = microtime(true);
$time = $time_end - $time_start;

echo "Loaded in $time seconds\n";