Online PHP editor | perf for DZgrc

@ 2019-09-20T23:03:32Z

<?php

define('TEST_LOOPS', 10);
define('TEST_STRING', str_repeat('English+日に本ほん語ご', 16000));
//define('TEST_STRING', str_repeat('English', 16000));
//define('TEST_STRING', str_repeat('日に本ほん語ご', 16000));

error_reporting(-1);
mb_internal_encoding('UTF-8');


function test($label, $callback)
{
	$time = microtime(true);
	for ($i = 0; $i < TEST_LOOPS; $i++) {
		$callback();
	}

	$duration = microtime(true) - $time;
	echo "{$label}: {$duration}s\n";
}

test('preg_split+count', function() {
	$chars = preg_split('//u', TEST_STRING, -1, PREG_SPLIT_NO_EMPTY);
	$len = count($chars);
	for ($i = 0; $i < $len; $i++) {
		$char = $chars[$i];
		// use $char
	}
});

test('preg_split+foreach', function() {
	$chars = preg_split('//u', TEST_STRING, -1, PREG_SPLIT_NO_EMPTY);
	foreach ($chars as $char) {
	    // use $char
	}
});

test('preg_match_all', function() {
	if (preg_match_all('/./u', TEST_STRING, $matches)) {
		foreach ($matches[0] as $char) {
            // use $char
		}
	}
});

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
7.3.9	0.242	1.355	30.45
7.3.8	0.199	1.422	30.53
7.3.7	0.260	1.829	30.95
7.3.6	0.317	1.782	30.80
7.3.5	0.244	1.495	30.99
7.3.4	0.313	1.534	30.93
7.3.3	0.229	1.441	30.69
7.3.2	0.338	1.683	30.89
7.3.1	0.373	1.811	31.08
7.3.0	0.415	1.511	31.08
7.2.22	0.201	1.376	30.87
7.2.21	0.262	1.397	31.08
7.2.20	0.233	1.626	31.11
7.2.19	0.300	1.576	31.10
7.2.18	0.254	1.445	31.30
7.2.17	0.215	1.385	31.21
7.2.16	0.253	1.477	31.14
7.2.15	0.402	1.567	31.03
7.2.14	0.390	1.390	31.25
7.2.13	0.459	1.367	31.06
7.2.12	0.427	1.466	31.22
7.2.11	0.460	1.310	31.18
7.2.10	0.444	1.360	31.01
7.2.9	0.549	1.790	31.44
7.2.8	0.500	1.433	31.10
7.2.7	0.480	1.579	31.27
7.2.6	0.601	1.372	31.24
7.2.5	0.466	1.575	31.22
7.2.4	0.421	1.420	31.29
7.2.3	0.473	1.411	31.07
7.2.2	0.466	1.381	31.29
7.2.1	0.538	1.555	31.34
7.2.0	0.491	1.352	30.98
7.1.32	0.366	1.724	30.09
7.1.31	0.380	1.958	30.23
7.1.30	0.433	1.830	30.20
7.1.29	0.419	1.595	29.82
7.1.28	0.411	1.756	29.97
7.1.27	0.459	1.756	30.29
7.1.26	0.374	1.720	30.12
7.1.25	0.383	1.566	30.25

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