This function returns the amount of time (in seconds) to generate the page.
<?php timer_stop( $display = 0, $precision = 3 ); ?>
Determine length of time to render page with a precision of 3, 5 and 10 digits.
<?php echo('Seconds: '.timer_stop( 0 ).'<br />'); ?>
<?php echo('Seconds: '.timer_stop( 0, 5 ).'<br />'); ?>
<?php echo('Seconds: '.timer_stop( 0, 10 ).'<br />'; ?>
Seconds: 0.815
Seconds: 0.81551
Seconds: 0.8155429363
For a comprehensive list of functions, take a look at the category Functions
Also, see Function_Reference