3v4l.org

run code in 300+ PHP versions simultaneously
<?php $starttime = microtime(true); $sArr = array(); for ($i = 0; $i < 30000; $i++) { $sArr[] = 'String concatenation. ' . $i; } $str = implode('', $sArr); $x = md5($str); $endtime = microtime(true); print "array append & implode: " . ($endtime - $starttime) . " s\n" ; // standard string append $starttime = microtime(true); $str = ''; for ($i = 0; $i < 30000; $i++) { $str .= 'String concatenation. ' . $i; } $x = md5($str); unset($str); $endtime = microtime(true); print "string concat: " . ($endtime - $starttime) . " s\n" ; $starttime = microtime(true); $sArr = array(); for ($i = 0; $i < 30000; $i++) { $sArr[] = 'String concatenation. ' . $i; } $str = implode('', $sArr); $x = md5($str); $endtime = microtime(true); print "array append & implode: " . ($endtime - $starttime) . " s\n" ;

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).

VersionSystem time (s)User time (s)Memory (MiB)
7.3.120.0070.02318.87
7.3.110.0100.01718.95
7.3.100.0040.02818.99
7.3.90.0030.02318.68
7.3.80.0070.02718.84
7.3.70.0130.01618.81
7.3.60.0060.02918.50
7.3.50.0190.01318.81
7.3.40.0100.02418.89
7.3.30.0160.01618.93
7.3.20.0030.03120.34
7.3.10.0060.02220.59
7.3.00.0070.02420.66
7.2.240.0130.01919.24
7.2.230.0060.02319.29
7.2.220.0060.02819.36
7.2.210.0100.02719.21
7.2.200.0160.01618.79
7.2.190.0090.02419.10
7.2.180.0030.03319.12
7.2.170.0060.02918.93
7.2.160.0070.02419.09
7.2.150.0030.03120.93
7.2.140.0130.02220.89
7.2.130.0180.01820.91
7.2.120.0100.02920.90
7.2.110.0070.03120.96
7.2.100.0160.02020.81
7.2.90.0030.03421.05
7.2.80.0030.03021.00
7.2.70.0100.02321.01
7.2.60.0070.02120.84
7.2.50.0070.02420.52
7.2.40.0200.01321.01
7.2.30.0030.02721.00
7.2.20.0160.01920.74
7.2.10.0070.03020.73
7.2.00.0030.02620.88
7.1.330.0070.03319.68
7.1.320.0130.02519.77
7.1.310.0170.02019.74
7.1.300.0100.02419.64
7.1.290.0130.02619.67
7.1.280.0160.02019.47
7.1.270.0090.02819.52
7.1.260.0100.02819.57
7.1.250.0070.03319.66
7.1.70.0030.01620.95
7.1.60.0130.03321.18
7.1.50.0100.03420.73
7.1.00.0070.07026.29
7.0.200.0570.02018.87
7.0.140.0100.08025.93
7.0.120.0070.09026.05
7.0.60.0030.05323.99
7.0.50.0070.08321.89
7.0.40.0000.10720.09
7.0.30.0100.06020.09
7.0.20.0370.08320.18
7.0.10.0170.07320.16
7.0.00.0100.07020.17
5.6.280.0200.09727.49
5.6.210.0100.11726.98
5.6.200.0100.06324.54
5.6.190.0130.11026.68
5.6.180.4000.06726.54
5.6.170.0270.09326.73
5.6.160.0070.09326.62
5.6.150.0200.12024.55
5.6.140.0170.10324.46
5.6.130.0130.10724.43
5.6.120.0100.09727.41
5.6.110.0200.10327.37
5.6.100.0200.10027.34
5.6.90.0130.10727.34
5.6.80.0170.10326.88
5.5.350.0300.09726.79
5.5.340.0030.06324.30
5.5.330.0430.04326.47
5.5.320.0300.07027.44
5.5.310.0270.06726.62
5.5.300.0100.07024.30
5.5.290.0170.11324.27
5.5.280.0100.07327.14
5.5.270.0270.10327.06
5.5.260.0100.11727.27
5.5.250.0270.09727.03
5.5.240.0400.09726.53
5.4.450.0100.06025.66
5.4.440.0200.09725.65
5.4.430.0130.10325.43
5.4.420.0030.06725.80
5.4.410.0070.07725.58
5.4.400.0030.06325.39
5.4.390.0200.10025.43
5.4.380.0170.05725.47
5.4.370.0130.10725.30
5.4.360.0100.11025.27
5.4.350.0200.10025.39
5.4.340.0000.07025.48
5.4.320.0100.11025.44
5.4.310.0130.10325.33
5.4.300.0130.11325.30
5.4.290.0030.07325.26
5.4.280.0170.11025.30
5.4.270.0070.11025.22
5.4.260.0130.05725.38
5.4.250.0200.09725.32
5.4.240.0100.08325.22
5.4.230.0070.07325.41
5.4.220.0100.11325.38
5.4.210.0170.10025.48
5.4.200.0070.10725.46
5.4.190.0200.08325.21
5.4.180.0070.06725.21
5.4.170.0170.10725.32
5.4.160.0100.10725.09
5.4.150.0000.07725.31
5.4.140.0200.04722.68
5.4.130.0170.08022.62
5.4.120.0200.10322.66
5.4.110.0170.09322.63
5.4.100.0100.09022.59
5.4.90.0070.11322.63
5.4.80.0130.10022.59
5.4.70.0100.10722.70
5.4.60.0070.10722.59
5.4.50.0130.09723.67
5.4.40.0070.09022.68
5.4.30.0070.10723.20
5.4.20.0130.10322.73
5.4.10.0100.06322.62
5.4.00.0130.10021.96
5.3.290.0230.09320.95
5.3.280.0130.08021.02
5.3.270.0070.11721.04
5.3.260.0170.10720.98
5.3.250.0100.07721.04
5.3.240.0100.05721.02
5.3.230.0030.09721.06
5.3.220.0100.10320.95
5.3.210.0100.11320.98
5.3.200.0070.11720.90
5.3.190.0100.11020.85
5.3.180.0070.11020.99
5.3.170.0070.11320.98
5.3.160.0200.10321.00
5.3.150.0130.10321.00
5.3.140.0100.08021.06
5.3.130.0100.11020.98
5.3.120.0070.11020.93
5.3.110.0100.08720.99
5.3.100.0170.05020.46
5.3.90.0070.07020.46
5.3.80.0000.11320.39
5.3.70.0170.10020.37
5.3.60.0030.08020.45
5.3.50.0030.06320.23
5.3.40.0200.09720.23
5.3.30.0070.11020.32
5.3.20.0000.11320.07
5.3.10.0030.11019.93
5.3.00.0130.10319.96
5.2.170.0000.08017.24
5.2.160.0030.05317.33
5.2.150.0030.10717.27
5.2.140.0030.10017.23
5.2.130.0230.08717.18
5.2.120.0030.10017.25
5.2.110.0070.10317.28
5.2.100.0070.10017.22
5.2.90.0000.08017.36
5.2.80.0030.09717.26
5.2.70.0100.09317.26
5.2.60.0030.11317.20
5.2.50.0100.11317.18
5.2.40.0030.11317.07
5.2.30.0070.09717.05
5.2.20.0000.07017.18
5.2.10.0030.10317.17
5.2.00.0100.10016.95
5.1.60.0100.12021.38
5.1.50.0070.07021.32
5.1.40.0070.12321.30
5.1.30.0030.10321.72
5.1.20.0130.10021.74
5.1.10.0000.08021.55
5.1.00.0030.07321.32
5.0.50.0070.07719.95
5.0.40.0030.12320.00
5.0.30.0070.13319.73
5.0.20.0030.10319.56
5.0.10.0030.13019.47
5.0.00.0070.13319.57
4.4.90.0070.11721.10
4.4.80.0170.09720.97
4.4.70.0170.10020.98
4.4.60.0070.12320.95
4.4.50.0170.11721.11
4.4.40.0070.13721.10
4.4.30.0130.11320.96
4.4.20.0070.07721.11
4.4.10.0070.11721.02
4.4.00.0030.12321.13
4.3.110.0130.10720.93
4.3.100.0000.07720.92
4.3.90.0070.09720.87
4.3.80.0000.14320.89
4.3.70.0100.08320.94
4.3.60.0070.09020.98
4.3.50.0200.10320.88
4.3.40.0070.13320.83
4.3.30.0070.12319.63
4.3.20.0130.11019.63
4.3.10.0100.10715.79
4.3.00.0100.10715.85

preferences:
37.29 ms | 401 KiB | 5 Q