Benchmark One - High
2.9243151600001 - 6000 cycles
Benchmark Two - High
3.01572098 - 6000 cycles
Benchmark One - Low
3.9586746000001 - 6000 cycles
Benchmark Two - Low
4.53636405 - 6000 cycles
Current Benchmark
<?php
$find = 'syridium';
$string = $str;
if (strpos($string, $find) !== false) echo '!';
?>
vs.
<?php
$find = 'syridium';
$string = $str;
if (preg_match('/'.$find.'/', $string)) echo '!';
?>
Conclusion
After an average of 6000 cycles, the fastest option is Benchmark 1!
<?php
$find = 'syridium';
$string = $str;
if (strpos($string, $find) !== false) echo '!';
?>