There was a small debate regarding the speed of fnmatch over pathinfo here : http://stackoverflow.com/questions/2692536/how-to-check-if-file-is-php
I wasn't totally convinced so decided to benchmark the two functions.
Using dynamic and static paths showed that pathinfo was faster.
Is my benchmarking logic and conclusion valid?
I include a sample of the results which are in seconds for 100,000 iterations on my machine :
dynamic path
pathinfo 3.79311800003
fnmatch 5.10071492195
x1.34
static path
pathinfo 1.03921294212
fnmatch 2.37709188461
x2.29
Code:
<pre>
<?php
$iterations=100000;
// Benchmark with dynamic file path
print("dynamic path\n");
$i=$iterations;
$t1=microtime(true);
while($i-->0){
$f='/'.uniqid().'/'.uniqid().'/'.uniqid().'/'.uniqid().'.php';
if(pathinfo($f,PATHINFO_EXTENSION)=='php') $d=uniqid();
}
$t2=microtime(true) - $t1;
print("pathinfo $t2\n");
$i=$iterations;
$t1=microtime(true);
while($i-->0){
$f='/'.uniqid().'/'.uniqid().'/'.uniqid().'/'.uniqid().'.php';
if(fnmatch('*.php',$f)) $d=uniqid();
}
$t3 = microtime(true) - $t1;
print("fnmatch $t3\n");
print('x'.round($t3/$t2,2)."\n\n");
// Benchmark with static file path
print("static path\n");
$f='/'.uniqid().'/'.uniqid().'/'.uniqid().'/'.uniqid().'.php';
$i=$iterations;
$t1=microtime(true);
while($i-->0) if(pathinfo($f,PATHINFO_EXTENSION)=='php') $d=uniqid();
$t2=microtime(true) - $t1;
print("pathinfo $t2\n");
$i=$iterations;
$t1=microtime(true);
while($i-->0) if(fnmatch('*.php',$f)) $d=uniqid();
$t3=microtime(true) - $t1;
print("fnmatch $t3\n");
print('x'.round($t3/$t2,2)."\n\n");
?>
</pre>
