3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var = "12345"; $time_start = microtime(true); echo $var[0] . "-" . substr($var,1) . "\n"; $time_end = microtime(true); echo "\nExecution Time: " . $time_end - $time_start; $time_start = microtime(true); echo str_replace($var[0], $var[0].'-', $var) . "\n"; $time_end = microtime(true); echo "\nExecution Time: " . $time_end - $time_start;

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)
7.4.00.0030.01614.91
7.3.120.0060.00614.82
7.3.110.0000.01814.97
7.3.100.0140.00415.04
7.3.90.0090.00615.01
7.3.80.0030.01015.09
7.3.70.0000.01114.71
7.3.60.0000.01614.74
7.3.50.0030.00714.73
7.3.40.0070.00714.71
7.3.30.0100.00314.98
7.3.20.0070.00716.75
7.3.10.0120.00616.54
7.3.00.0070.00716.59
7.2.250.0070.01015.32
7.2.240.0000.01914.95
7.2.230.0060.01314.98
7.2.220.0060.00815.32
7.2.210.0030.00815.27
7.2.200.0090.00615.30
7.2.190.0030.00915.07
7.2.180.0040.00814.90
7.2.170.0030.01015.04
7.2.130.0030.01016.80
7.2.120.0030.01016.69
7.2.110.0030.01216.97
7.2.100.0110.00316.71
7.2.90.0060.00316.65
7.2.80.0200.01016.91
7.2.70.0040.00716.68
7.2.60.0000.01616.64
7.2.50.0150.00416.80
7.2.40.0080.00716.69
7.2.30.0130.00516.84
7.2.20.0000.01116.45
7.2.10.0100.00316.41
7.2.00.0100.00718.33
7.1.330.0090.00615.75
7.1.320.0080.00516.04
7.1.310.0060.00815.76
7.1.300.0060.00615.60
7.1.290.0120.00415.74
7.1.280.0030.01015.89
7.1.270.0030.00915.66
7.1.260.0140.00015.60
7.1.250.0150.00415.26
7.1.70.0000.00917.01
7.1.60.0000.02119.22
7.1.50.0230.01034.56
7.1.00.0070.07322.28
7.0.200.0100.00316.41
7.0.140.0000.07721.95
7.0.60.0170.07719.94
7.0.50.0070.08017.67
7.0.40.0100.08319.98
7.0.30.0400.07320.13
7.0.20.0230.08019.99
7.0.10.0100.08320.09
7.0.00.0100.08720.00
5.6.280.0000.07721.09
5.6.210.0000.05720.71
5.6.200.0170.06018.15
5.6.190.0070.04320.27
5.6.180.0030.09320.56
5.6.170.0270.04320.36
5.6.160.0070.08320.46
5.6.150.0170.05318.12
5.6.140.0130.03318.16
5.6.130.0070.07718.21
5.6.120.0130.06021.09
5.6.110.0100.05020.99
5.6.100.0100.08020.98
5.6.90.0100.08020.97
5.6.80.0030.05720.48
5.5.350.0000.08320.30
5.5.340.0230.06317.91
5.5.330.0000.04320.57
5.5.320.0330.07720.28
5.5.310.0170.04720.48
5.5.300.0100.08317.95
5.5.290.0100.07318.02
5.5.280.0030.04320.73
5.5.270.0130.07720.84
5.5.260.0100.08320.68
5.5.250.0030.04320.57
5.5.240.0030.06020.15
5.4.450.0070.07719.41
5.4.440.0000.07719.48
5.4.430.0100.06319.45
5.4.420.0030.08319.42
5.4.410.0070.06719.27
5.4.400.0030.04719.13
5.4.390.0100.06319.04
5.4.380.0000.04019.09
5.4.370.0000.05319.13
5.4.360.0070.06019.15
5.4.350.0000.06019.11
5.4.340.0030.03719.07
5.4.320.0030.09018.80
5.4.310.0000.05719.21
5.4.300.0000.04319.21
5.4.290.0000.08318.88
5.4.280.0100.07018.91
5.4.270.0070.07719.10
5.4.260.0030.05319.13
5.4.250.0100.07319.15
5.4.240.0100.07019.08
5.4.230.0030.07319.07
5.4.220.0000.08719.13
5.4.210.0070.06019.12
5.4.200.0070.06319.11
5.4.190.0000.08019.10
5.4.180.0030.06719.21
5.4.170.0030.07319.05
5.4.160.0000.04318.89
5.4.150.0000.07719.11
5.4.140.0000.06016.29
5.4.130.0030.03716.29
5.4.120.0100.05316.44
5.4.110.0030.07316.41
5.4.100.0000.03716.06
5.4.90.0070.03716.39
5.4.80.0100.04016.39
5.4.70.0070.05716.37
5.4.60.0030.07316.19
5.4.50.0000.03716.31
5.4.40.0030.04016.38
5.4.30.0030.06316.20
5.4.20.0070.03716.45
5.4.10.0030.03716.40
5.4.00.0030.07015.90
5.3.290.0030.04014.75
5.3.280.0070.08314.55
5.3.270.0130.08014.54
5.3.260.0030.04714.51
5.3.250.0000.07014.61
5.3.240.0070.03314.46
5.3.230.0000.06314.54
5.3.220.0000.06714.60
5.3.210.0000.06314.41
5.3.200.0070.07714.40
5.3.190.0100.04014.55
5.3.180.0030.07714.54
5.3.170.0070.07314.49
5.3.160.0100.07014.42
5.3.150.0030.06314.48
5.3.140.0000.04014.38
5.3.130.0000.07014.40
5.3.120.0000.04014.49
5.3.110.0000.04014.50
5.3.100.0100.06713.91
5.3.90.0030.07713.86
5.3.80.0030.05713.80
5.3.70.0070.04713.96
5.3.60.0000.06013.96
5.3.50.0070.06313.74
5.3.40.0030.06313.79
5.3.30.0070.07013.77
5.3.20.0030.07013.78
5.3.10.0070.06713.59
5.3.00.0100.06713.66
5.2.170.0030.05011.68
5.2.160.0030.05011.68
5.2.150.0030.06311.68
5.2.140.0070.06011.68
5.2.130.0030.05011.68
5.2.120.0000.05711.68
5.2.110.0000.04711.68
5.2.100.0030.04311.68
5.2.90.0000.05711.68
5.2.80.0030.06011.68
5.2.70.0030.06711.68
5.2.60.0070.05711.68
5.2.50.0030.05311.68
5.2.40.0000.03711.68
5.2.30.0070.05711.68
5.2.20.0000.03011.68
5.2.10.0000.06311.68
5.2.00.0030.05311.68
5.1.60.0000.04011.68
5.1.50.0070.03311.68
5.1.40.0030.04711.68
5.1.30.0030.05711.68
5.1.20.0030.05311.68
5.1.10.0030.03011.68
5.1.00.0030.02711.68
5.0.50.0030.04311.68
5.0.40.0070.03311.68
5.0.30.0000.06311.68
5.0.20.0070.04011.68
5.0.10.0070.04011.68
5.0.00.0000.06311.68
4.4.90.0000.02711.68
4.4.80.0000.03711.68
4.4.70.0000.03711.68
4.4.60.0000.03311.68
4.4.50.0000.03711.68
4.4.40.0000.04311.68
4.4.30.0030.03311.68
4.4.20.0000.03011.68
4.4.10.0030.03311.68
4.4.00.0000.04011.68
4.3.110.0030.03311.68
4.3.100.0000.03711.68
4.3.90.0000.02711.68
4.3.80.0000.05011.68
4.3.70.0070.02011.68
4.3.60.0070.02711.68
4.3.50.0000.02711.68
4.3.40.0070.04711.68
4.3.30.0000.02311.68
4.3.20.0030.03711.68
4.3.10.0030.02011.68
4.3.00.0000.03711.68

preferences:
43.52 ms | 400 KiB | 5 Q