Exicution time of your Scripts

[Xeoncross]

Hello!

 

Well, this afternoon finds me working with the microtime() function as I am trying to find the best way to time my scripts. I want to figure out the fastest/most reliable way to find the execution time of my scripts.

 

So far I have been playing with the following code:

 

<?php
$time_start = array_sum(explode(' ', microtime()));
$total_time = round(array_sum(explode(' ', microtime())) - $time_start, 6);
echo $total_time;
?>

<br />

<?php
$time = microtime(true);
$total_time = (microtime(true) - $time);
echo $total_time;
?>

<br />

<?php
// Function to calculate script execution time.
function microtime_float ()
{ 
    list ($msec, $sec) = explode(' ', microtime()); 
    $microtime = (float)$msec + (float)$sec;
    return $microtime; 
}

$start = microtime_float();
$end = microtime_float(); 

// Print results.
echo $end - $start; 
?>

 

which give me on average (I think) the following times:

7.6E-05
6.9141387939453E-06
5.0067901611328E-05

or

0.000039439557949823496
0.000009153168140048553
0.00031783597286984895

More often I get:
8E-05
6.9141387939453E-06
3.3140182495117E-05

 

In case you don't know - those are exponents. http://www.webwinder.com/wwhtmbin/jexpont.html

 

As you can see, the last way is very poor in scoring a fast time - so that means that I am leaning toward the second way - but I just wanted to know if anyone could time a script faster. 

[Xeoncross]

 

This code seems to work better. 

 

 

<?php
// Function to calculate script execution time.
function microtime_float ()
{ 
    list ($msec, $sec) = explode(' ', microtime()); 
    $microtime = (float)$msec + (float)$sec;
    return $microtime; 
}
?>

<table>
<tr>
<td>
<?php
$time_start = array_sum(explode(' ', microtime()));
sleep(1);
$total_time = round(array_sum(explode(' ', microtime())) - $time_start, 6);
echo $total_time;
?>
</td>
<td>
<?php
$time_start = array_sum(explode(' ', microtime()));
sleep(1);
$total_time = round(array_sum(explode(' ', microtime())) - $time_start, 6);
echo $total_time;
?>
</td>
</tr>

<tr>
<td>
<?php
$time = microtime(true);
sleep(1);
$total_time = (microtime(true) - $time);
echo $total_time;
?>
</td>
<td>
<?php
$time = microtime(true);
sleep(1);
$total_time = (microtime(true) - $time);
echo $total_time;
?>
</td>
</tr>

<tr>
<td>
<?php
$time = microtime();
sleep(1);
$total_time = (microtime() - $time);
echo $total_time;
?>
</td>
<td>
<?php
$time = microtime();
sleep(1);
$total_time = (microtime() - $time);
echo $total_time;
?>
</td>
</tr>

<tr>
<td>
<?php
// Get starting time.
$start = microtime_float();
sleep(1);
$end = microtime_float() - $start; 
echo $end;    
?>
</td>
<td>
<?php
// Get starting time.
$start = microtime_float();
sleep(1);
$end = microtime_float() - $start; 
echo $end;    
?>
</td>
</tr>
</table>

[Xeoncross]

Ok, after more testing I found that microtime(true) seems to be the fastest way to count script time. 

 

 

0.086866855621338 0.077500104904175

0.078529119491577 0.077292919158936

 

 

Here is the code:

 

<?php
function keep_counting() {
    $x=0;
    while($x < 100000) {
        $x = $x + $x - $x + 1;
        $b = $x*1000/3;
        $b *= 999;
    }
}
?>
<table cellpadding="5" border="1">
<tr>
<td>
<?php
$time_start = array_sum(explode(' ', microtime()));
keep_counting();
echo array_sum(explode(' ', microtime())) - $time_start;
?>
</td>
<td>
<?php
$time = microtime(true);
keep_counting();
echo (microtime(true) - $time);
?>
</td>
</tr>


<tr>
<td>
<?php
$time_start = array_sum(explode(' ', microtime()));
keep_counting();
echo array_sum(explode(' ', microtime())) - $time_start;
?>
</td>
<td>
<?php
$time = microtime(true);
keep_counting();
echo (microtime(true) - $time);
?>
</td>
</tr>
</table>