<?php
function starts_with_strpos($haystack, $needle) {
return strpos($haystack, $needle) === 0;
}
function starts_with_substr($haystack, $needle) {
return substr($haystack, 0, strlen($needle)) === $needle;
}
// setup the haystack and needle
$haystack = "Hello PHP";
$needle = "Hello";
// initialize the results array
$results = array('substr' => array(), 'strpos' => array());
// Run the substr benchmark
// exhaust the gc's threshhold at 10K
$it = 10000;
for($i = 0; $i < $it; $i++) {
$t = microtime(true);
starts_with_substr($haystack, $needle);
$results['substr'][] = microtime(true) - $t;
}
// discard the first and last results as opline biased
array_pop($results['substr']);
array_shift($results['substr']);
// Run the strpos benchmark
for($i = 0; $i < $it; $i++) {
$t = microtime(true);
starts_with_strpos($haystack, $needle);
$results['strpos'][] = microtime(true) - $t;
}
// discard the first and last results as opline biased
array_pop($results['strpos']);
array_shift($results['strpos']);
// compare the results
$a = array_sum($results['substr']) / $it;
$b = array_sum($results['strpos']) / $it;
printf("substr: %.6fs/iteration @ %d iterations\nstrpos: %.6fs/iteration @ %d iterations\n\n", $a, $it, $b, $it);
// determine which is faster (substr or strpos)
if ($a > $b) { // substr is slower
printf("strpos is %d%% faster than substr\n", $b / $a * 100);
} elseif ($b > $a) { // strpos is slower
printf("substr is %d%% faster than strpos\n", $a / $b * 100);
} else { // they're the same
printf("strpos and substr are the same\n");
}
- Output for 7.4.0
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
substr is 90% faster than strpos
- Output for 7.0.14, 7.2.8, 7.2.21, 7.3.12
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 93% faster than substr
- Output for 7.3.8, 7.3.11
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 95% faster than substr
- Output for 7.3.10
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 97% faster than substr
- Output for 7.1.7, 7.3.9
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 96% faster than substr
- Output for 5.4.7, 5.4.21, 5.4.37 - 5.4.38, 5.5.1, 5.5.10, 5.5.12, 5.5.23, 5.6.0, 7.3.7
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 71% faster than substr
- Output for 7.1.5, 7.2.2, 7.2.9, 7.2.11, 7.2.17, 7.3.0, 7.3.6
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 91% faster than substr
- Output for 7.0.2, 7.0.9, 7.1.6, 7.2.23, 7.3.5
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 84% faster than substr
- Output for 5.4.22, 7.3.4
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 79% faster than substr
- Output for 7.0.10, 7.2.4 - 7.2.5, 7.2.19, 7.3.3
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 90% faster than substr
- Output for 7.0.0, 7.1.29, 7.1.33, 7.3.2
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 85% faster than substr
- Output for 5.5.27, 7.2.0, 7.3.1
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 60% faster than substr
- Output for 5.5.18, 7.0.5, 7.2.25
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 78% faster than substr
- Output for 7.2.6, 7.2.24
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 89% faster than substr
- Output for 7.1.0, 7.2.22
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
substr is 99% faster than strpos
- Output for 5.4.14, 5.5.4, 7.2.20
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 74% faster than substr
- Output for 7.2.18
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 57% faster than substr
- Output for 7.0.7, 7.2.10, 7.2.14, 7.2.16
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 86% faster than substr
- Output for 5.3.19, 7.0.4, 7.2.15
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 80% faster than substr
- Output for 7.1.25, 7.1.27, 7.2.7, 7.2.13
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 88% faster than substr
- Output for 5.4.36, 7.2.12
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 76% faster than substr
- Output for 5.3.18, 5.3.26, 5.3.28, 5.5.6, 5.5.15, 7.2.3
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 77% faster than substr
- Output for 7.2.1
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 92% faster than substr
- Output for 7.1.32
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 81% faster than substr
- Output for 5.5.8, 7.0.3, 7.1.31
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 82% faster than substr
- Output for 5.4.17, 7.1.30
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 64% faster than substr
- Output for 5.5.38, 5.6.24, 7.1.28
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 66% faster than substr
- Output for 7.1.26
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 55% faster than substr
- Output for 7.0.8, 7.0.20
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 87% faster than substr
- Output for 7.0.6
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 72% faster than substr
- Output for 5.4.15, 5.4.18, 7.0.1
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 73% faster than substr
- Output for 5.0.2, 5.3.6, 5.3.14 - 5.3.15, 5.6.28
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 67% faster than substr
- Output for 5.3.7, 5.3.10, 5.3.17, 5.3.27, 5.5.28, 5.6.25
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 69% faster than substr
- Output for 5.5.33, 5.6.23
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 54% faster than substr
- Output for 5.3.2, 5.5.25, 5.6.22
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 64% faster than substr
- Output for 5.6.21
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 56% faster than substr
- Output for 5.5.32, 5.6.20
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 53% faster than substr
- Output for 5.3.11, 5.4.1, 5.5.34, 5.6.12, 5.6.19
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 66% faster than substr
- Output for 5.3.21, 5.3.23, 5.4.10, 5.4.26, 5.4.31, 5.5.7, 5.5.20, 5.6.2, 5.6.5, 5.6.7, 5.6.16, 5.6.18
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 70% faster than substr
- Output for 5.1.2, 5.6.17
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 72% faster than substr
- Output for 5.3.8, 5.4.8, 5.5.13, 5.6.15
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 70% faster than substr
- Output for 5.6.14
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 65% faster than substr
- Output for 5.4.40, 5.4.42, 5.5.14, 5.5.36, 5.6.11, 5.6.13
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 67% faster than substr
- Output for 5.2.14, 5.3.16, 5.3.29, 5.4.3, 5.4.41, 5.5.16, 5.5.22, 5.5.24, 5.5.30, 5.5.35, 5.6.9 - 5.6.10
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 68% faster than substr
- Output for 5.6.8
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 40% faster than substr
- Output for 5.4.13, 5.6.6
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 63% faster than substr
- Output for 5.3.25, 5.4.9, 5.4.12, 5.4.16, 5.4.23, 5.4.28, 5.4.34, 5.4.39, 5.5.5, 5.5.21, 5.6.4
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 68% faster than substr
- Output for 5.3.20, 5.4.19, 5.4.29 - 5.4.30, 5.5.0, 5.6.3
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 69% faster than substr
- Output for 5.6.1
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 96% faster than substr
- Output for 5.4.25, 5.5.26, 5.5.37
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 47% faster than substr
- Output for 5.4.44, 5.5.31
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 55% faster than substr
- Output for 5.4.27, 5.5.29
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 52% faster than substr
- Output for 5.5.19
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 65% faster than substr
- Output for 5.5.9, 5.5.11
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 61% faster than substr
- Output for 5.3.22, 5.4.20, 5.4.35, 5.5.2 - 5.5.3
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 67% faster than substr
- Output for 5.4.45
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 64% faster than substr
- Output for 5.4.43
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 32% faster than substr
- Output for 5.3.13, 5.4.32
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 57% faster than substr
- Output for 5.4.24
- substr: 0.000000s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 75% faster than substr
- Output for 5.4.11
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 65% faster than substr
- Output for 5.2.2, 5.4.6
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 75% faster than substr
- Output for 5.4.5
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 45% faster than substr
- Output for 5.4.4
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 55% faster than substr
- Output for 5.2.9, 5.4.2
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 62% faster than substr
- Output for 5.4.0
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 42% faster than substr
- Output for 5.3.12, 5.3.24
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 63% faster than substr
- Output for 5.3.0, 5.3.9
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 68% faster than substr
- Output for 5.2.6, 5.3.5
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 70% faster than substr
- Output for 5.3.4
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 71% faster than substr
- Output for 5.3.3
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 80% faster than substr
- Output for 5.3.1
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 35% faster than substr
- Output for 5.2.8, 5.2.17
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 73% faster than substr
- Output for 5.2.16
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 76% faster than substr
- Output for 5.2.15
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 56% faster than substr
- Output for 4.4.9, 5.1.4, 5.2.7, 5.2.13
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 72% faster than substr
- Output for 5.2.11 - 5.2.12
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 78% faster than substr
- Output for 5.2.10
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 81% faster than substr
- Output for 5.2.5
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 61% faster than substr
- Output for 5.2.3 - 5.2.4
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 71% faster than substr
- Output for 5.2.1
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000000s/iteration @ 10000 iterations
strpos is 87% faster than substr
- Output for 5.1.6, 5.2.0
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 66% faster than substr
- Output for 5.1.5
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 76% faster than substr
- Output for 5.1.3
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 45% faster than substr
- Output for 5.1.1
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 46% faster than substr
- Output for 5.1.0
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 75% faster than substr
- Output for 5.0.0, 5.0.5
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 61% faster than substr
- Output for 5.0.4
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 79% faster than substr
- Output for 5.0.3
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 74% faster than substr
- Output for 5.0.1
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 59% faster than substr
- Output for 4.4.8
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 71% faster than substr
- Output for 4.4.1, 4.4.7
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 80% faster than substr
- Output for 4.4.6
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 83% faster than substr
- Output for 4.4.5
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 64% faster than substr
- Output for 4.4.4
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 78% faster than substr
- Output for 4.3.4, 4.4.3
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 65% faster than substr
- Output for 4.4.2
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 72% faster than substr
- Output for 4.4.0
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 47% faster than substr
- Output for 4.3.11
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 70% faster than substr
- Output for 4.3.9 - 4.3.10
- substr: 0.000001s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 82% faster than substr
- Output for 4.3.8
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000002s/iteration @ 10000 iterations
strpos is 78% faster than substr
- Output for 4.3.7
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 69% faster than substr
- Output for 4.3.6
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 83% faster than substr
- Output for 4.3.3, 4.3.5
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 62% faster than substr
- Output for 4.3.2
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 66% faster than substr
- Output for 4.3.1
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000001s/iteration @ 10000 iterations
strpos is 63% faster than substr
- Output for 4.3.0
- substr: 0.000002s/iteration @ 10000 iterations
strpos: 0.000002s/iteration @ 10000 iterations
strpos is 86% faster than substr
preferences:
199.14 ms | 401 KiB | 264 Q