Online PHP editor | perf for 0l0jt

@ 2014-08-10T23:26:45Z

<?php

// needed to cope with a million entry array
ini_set('memory_limit', '512M');

$limit = 100000;

$text[] = "Now is the time";
$text[] = "for all good men";
$text[] = "to come to the aid";
$text[] = "of their country.";

$text2['part1'] = "Now is the time";
$text2['part2'] = "for all good men";
$text2['part3'] = "to come to the aid";
$text2['part4'] = "of their country.";

$bigArray = fillArray($limit);

$max=count($bigArray);

#######################################################

$start = microtime(TRUE);

for($i=0; $i<$max; $i++) {
	$bigArray[$i]  = $text[0];
	$bigArray[$i] .= ' ';
	$bigArray[$i] .= $text[1];
	$bigArray[$i] .= ' ';
	$bigArray[$i] .= $text[2];
	$bigArray[$i] .= ' ';
	$bigArray[$i] .= $text[3];
}

$results['dotequal']['time'] = microtime(TRUE) - $start;
$results['dotequal']['name'] = 'Dot Equals';

#######################################################

$start = microtime(TRUE);

for($i=0; $i<$max; $i++) {
	$bigArray[$i] = $text[0].' '.$text[1].' '.$text[2].' '.$text[3];
}

$results['concat']['time'] = microtime(TRUE) - $start;
$results['concat']['name'] = 'Dot Concatenation';

#######################################################

$start = microtime(TRUE);

for($i=0; $i<$max; $i++) {
	$bigArray[$i] = "$text[0] $text[1] $text[2] $text[3]";
}

$results['replace']['time'] = microtime(TRUE) - $start;
$results['replace']['name'] = 'In-string Replacement';

#######################################################

$start = microtime(TRUE);

for($i=0; $i<$max; $i++) {
	$bigArray[$i] = "{$text2['part1']} {$text2['part2']} {$text2['part3']} {$text2['part4']}";
}

$results['replace2']['time'] = microtime(TRUE) - $start;
$results['replace2']['name'] = 'Complex In-string Replacement';

#######################################################

$start = microtime(TRUE);

for($i=0; $i<$max; $i++) {
	$bigArray[$i] = sprintf('%s %s %s %s', $text[0], $text[1], $text[2], $text[3]);
}

$results['sprintf']['time'] = microtime(TRUE) - $start;
$results['sprintf']['name'] = 'Function: sprintf()';

#######################################################

$start = microtime(TRUE);

for($i=0; $i<$max; $i++) {
	$bigArray[$i] = implode(' ', $text);
}

$results['implode']['time'] = microtime(TRUE) - $start;
$results['implode']['name'] = 'Function: implode()';

#######################################################

foreach($results AS $test) {
	echo "$test['name'] -- sprintf("%01.6f", $test['time'])\n";
}

#######################################################

function fillArray($limit) {
	// build huge array
	for($i=0; $i<$limit; $i++) {
		$array[] = $i;
	}
	return $array;
}

?>

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)
5.4.31	0.008	0.036	12.52
5.4.30	0.007	0.035	12.52
5.4.29	0.005	0.038	12.52
5.4.28	0.005	0.036	12.41
5.4.27	0.005	0.036	12.41
5.4.26	0.006	0.036	12.41
5.4.25	0.005	0.038	12.41
5.4.24	0.007	0.034	12.41
5.4.23	0.005	0.038	12.40
5.4.22	0.007	0.035	12.41
5.4.21	0.007	0.035	12.40
5.4.20	0.007	0.037	12.41
5.4.19	0.005	0.036	12.40
5.4.18	0.008	0.034	12.40
5.4.17	0.007	0.034	12.41
5.4.16	0.005	0.036	12.40
5.4.15	0.004	0.037	12.40
5.4.14	0.005	0.038	12.09
5.4.13	0.005	0.035	12.07
5.4.12	0.007	0.034	12.04
5.4.11	0.005	0.036	12.03
5.4.10	0.008	0.033	12.03
5.4.9	0.008	0.035	12.04
5.4.8	0.007	0.035	12.04
5.4.7	0.004	0.036	12.03
5.4.6	0.005	0.035	12.03
5.4.5	0.006	0.035	12.03
5.4.4	0.007	0.033	12.02
5.4.3	0.004	0.037	12.01
5.4.2	0.007	0.034	12.01
5.4.1	0.008	0.033	12.01
5.4.0	0.004	0.038	11.51
5.3.28	0.009	0.035	12.71
5.3.27	0.006	0.039	12.72
5.3.26	0.006	0.041	12.72
5.3.25	0.005	0.038	12.72
5.3.24	0.004	0.038	12.72
5.3.23	0.007	0.036	12.71
5.3.22	0.007	0.036	12.68
5.3.21	0.005	0.038	12.68
5.3.20	0.007	0.035	12.68
5.3.19	0.006	0.037	12.68
5.3.18	0.007	0.035	12.67
5.3.17	0.004	0.038	12.67
5.3.16	0.007	0.035	12.67
5.3.15	0.005	0.036	12.68
5.3.14	0.009	0.032	12.66
5.3.13	0.009	0.035	12.66
5.3.12	0.009	0.035	12.66
5.3.11	0.007	0.036	12.66
5.3.10	0.008	0.034	12.12
5.3.9	0.007	0.036	12.09
5.3.8	0.005	0.036	12.08
5.3.7	0.009	0.034	12.08
5.3.6	0.005	0.037	12.07
5.3.5	0.007	0.039	12.02
5.3.4	0.005	0.041	12.02
5.3.3	0.010	0.038	11.98
5.3.2	0.008	0.039	11.76
5.3.1	0.006	0.036	11.72
5.3.0	0.009	0.034	11.71
5.2.17	0.005	0.029	9.22
5.2.16	0.005	0.029	9.21
5.2.15	0.006	0.028	9.22
5.2.14	0.007	0.028	9.21
5.2.13	0.004	0.030	9.17
5.2.12	0.004	0.030	9.17
5.2.11	0.005	0.029	9.18
5.2.10	0.007	0.027	9.18
5.2.9	0.007	0.028	9.18
5.2.8	0.007	0.027	9.17
5.2.7	0.005	0.029	9.17
5.2.6	0.004	0.029	9.13
5.2.5	0.004	0.030	9.09
5.2.4	0.005	0.027	9.07
5.2.3	0.005	0.030	9.04
5.2.2	0.004	0.030	9.04
5.2.1	0.006	0.027	8.96
5.2.0	0.005	0.031	8.81
5.1.6	0.004	0.025	8.11
5.1.5	0.004	0.025	8.10
5.1.4	0.004	0.025	8.08
5.1.3	0.004	0.025	8.43
5.1.2	0.004	0.025	8.46
5.1.1	0.004	0.025	8.18
5.1.0	0.009	0.021	8.17
5.0.5	0.005	0.018	6.68
5.0.4	0.003	0.019	6.54
5.0.3	0.004	0.030	6.35
5.0.2	0.003	0.019	6.32
5.0.1	0.005	0.019	6.29
5.0.0	0.004	0.029	6.29
4.4.9	0.004	0.015	4.78
4.4.8	0.001	0.017	4.75
4.4.7	0.002	0.015	4.75
4.4.6	0.005	0.013	4.75
4.4.5	0.002	0.017	4.77
4.4.4	0.005	0.023	4.71
4.4.3	0.004	0.014	4.76
4.4.2	0.004	0.015	4.85
4.4.1	0.004	0.015	4.85
4.4.0	0.002	0.025	4.76
4.3.11	0.004	0.015	4.67
4.3.10	0.002	0.016	4.67
4.3.9	0.002	0.014	4.63
4.3.8	0.004	0.023	4.58
4.3.7	0.003	0.015	4.63
4.3.6	0.003	0.020	4.62
4.3.5	0.002	0.016	4.63
4.3.4	0.002	0.025	4.54
4.3.3	0.002	0.016	3.34
4.3.2	0.003	0.017	3.32
4.3.1	0.002	0.019	3.29
4.3.0	0.000	0.023	7.20

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