3v4l.org

run code in 300+ PHP versions simultaneously
<?php function reverseString($string) { $l = strlen($string); for($i=0; $i<$l/2; $i++) { $string[$i] = $string[$i] ^ $string[$l-$i]; $string[$l-$i] = $string[$i] ^ $string[$l-$i]; $string[$i] = $string[$i] ^ $string[$l-$i]; } return $string; } var_dump(reverseString('foo'));

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)
8.3.60.0070.00716.88
8.3.50.0170.00321.93
8.3.40.0120.00618.54
8.3.30.0070.00718.92
8.3.20.0040.00420.18
8.3.10.0000.00723.67
8.3.00.0060.00319.38
8.2.180.0140.00718.47
8.2.170.0040.01122.96
8.2.160.0040.01120.39
8.2.150.0040.00424.18
8.2.140.0040.00424.66
8.2.130.0070.00726.16
8.2.120.0040.00422.21
8.2.110.0030.00620.52
8.2.100.0120.00019.57
8.2.90.0040.00417.63
8.2.80.0040.00418.91
8.2.70.0040.00417.63
8.2.60.0000.00817.63
8.2.50.0000.00817.63
8.2.40.0030.00520.07
8.2.30.0040.00418.20
8.2.20.0040.00417.88
8.2.10.0030.00518.11
8.2.00.0040.00417.92
8.1.280.0120.00625.92
8.1.270.0030.00623.88
8.1.260.0000.00826.35
8.1.250.0070.00028.09
8.1.240.0100.00020.63
8.1.230.0080.00317.82
8.1.220.0000.00817.79
8.1.210.0030.00518.77
8.1.200.0030.00517.35
8.1.190.0040.00417.23
8.1.180.0040.00418.10
8.1.170.0000.00918.63
8.1.160.0050.00322.01
8.1.150.0070.00318.66
8.1.140.0050.00317.45
8.1.130.0030.00317.84
8.1.120.0080.00017.45
8.1.110.0030.00517.48
8.1.100.0040.00417.36
8.1.90.0040.00417.36
8.1.80.0000.00717.48
8.1.70.0040.00417.43
8.1.60.0060.00317.61
8.1.50.0000.00917.55
8.1.40.0040.00417.58
8.1.30.0040.00417.62
8.1.20.0050.00317.59
8.1.10.0040.00417.49
8.1.00.0040.00417.42
8.0.300.0060.00318.77
8.0.290.0040.00416.75
8.0.280.0030.00318.50
8.0.270.0050.00217.27
8.0.260.0030.00317.28
8.0.250.0030.00316.97
8.0.240.0040.00417.04
8.0.230.0070.00016.98
8.0.220.0000.00816.95
8.0.210.0000.00717.01
8.0.200.0060.00017.00
8.0.190.0060.00317.03
8.0.180.0080.00016.94
8.0.170.0080.00017.02
8.0.160.0030.00516.87
8.0.150.0000.00816.96
8.0.140.0040.00416.89
8.0.130.0000.00613.36
8.0.120.0030.00516.95
8.0.110.0050.00317.00
8.0.100.0030.00616.91
8.0.90.0040.00416.87
8.0.80.0110.00616.91
8.0.70.0040.00416.86
8.0.60.0000.00816.94
8.0.50.0000.00716.83
8.0.30.0100.01017.08
8.0.20.0070.01217.40
8.0.10.0070.00016.96
8.0.00.0090.00816.80
7.4.330.0000.00515.00
7.4.320.0030.00316.57
7.4.300.0030.00316.45
7.4.290.0040.00416.48
7.4.280.0000.00716.45
7.4.270.0030.00316.59
7.4.260.0030.00316.56
7.4.250.0040.00416.46
7.4.240.0050.00216.56
7.4.230.0030.00316.54
7.4.220.0060.01316.54
7.4.210.0060.00816.54
7.4.200.0070.00016.35
7.4.190.0000.00716.46
7.4.160.0060.01016.45
7.4.150.0040.01317.40
7.4.140.0090.00917.86
7.4.130.0100.00716.50
7.4.120.0090.00816.59
7.4.110.0110.00616.62
7.4.100.0040.01716.68
7.4.90.0100.00716.43
7.4.80.0120.00619.39
7.4.70.0030.01416.60
7.4.60.0040.01816.73
7.4.50.0040.00416.41
7.4.40.0090.00622.77
7.4.30.0060.01516.52
7.4.00.0040.01115.09
7.3.330.0050.00013.35
7.3.320.0000.00513.23
7.3.310.0020.00516.27
7.3.300.0070.00016.42
7.3.290.0120.00316.35
7.3.280.0110.00716.40
7.3.270.0030.01317.40
7.3.260.0090.00916.32
7.3.250.0090.00916.42
7.3.240.0160.00316.57
7.3.230.0130.00316.42
7.3.210.0120.00616.40
7.3.200.0090.01519.39
7.3.190.0090.00916.65
7.3.180.0090.00616.55
7.3.170.0090.00616.56
7.3.160.0090.01216.47
7.3.120.0000.01514.96
7.2.330.0110.00816.78
7.2.320.0180.00016.80
7.2.310.0130.00716.48
7.2.300.0100.00716.57
7.2.290.0070.01416.67
7.2.60.0000.01516.91
7.1.200.0040.00415.80
7.1.70.0030.00717.09
7.1.60.0000.02319.46
7.1.50.0070.01116.98
7.1.00.0070.07022.43
7.0.200.0100.00316.56
7.0.140.0070.07022.21
7.0.60.0070.06319.86
7.0.50.0030.08317.72
7.0.40.0170.07020.42
7.0.30.0370.07020.23
7.0.20.0230.05320.08
7.0.10.0030.05020.13
7.0.00.0100.08720.19
5.6.280.0000.07320.91
5.6.210.0030.08320.55
5.6.200.0100.07318.21
5.6.190.0100.04720.63
5.6.180.0130.04320.78
5.6.170.0170.06020.44
5.6.160.0130.04320.54
5.6.150.0030.04718.18
5.6.140.0070.05718.18
5.6.130.0030.06718.18
5.6.120.0170.08021.14
5.6.110.0130.07720.99
5.6.100.0100.05321.01
5.6.90.0130.07320.97
5.6.80.0100.04720.40
5.6.70.4270.03720.39
5.5.350.0130.08320.33
5.5.340.0100.05318.07
5.5.330.0070.06320.35
5.5.320.0030.04720.32
5.5.310.0230.06020.28
5.5.300.0070.05018.00
5.5.290.0100.06017.98
5.5.280.0100.04720.89
5.5.270.0170.06020.79
5.5.260.0030.08720.76
5.5.250.0070.07020.66
5.5.240.0270.07320.12
5.4.450.0400.05719.20
5.4.440.0670.06019.41
5.4.430.1000.04719.58
5.4.420.0630.00019.52
5.4.410.0070.07318.95
5.4.400.0170.05318.76
5.4.390.0170.05318.59
5.4.380.0100.06018.75
5.4.370.0030.04318.56
5.4.360.0030.04318.84
5.4.350.0030.03812.02
5.4.340.0060.03612.02
5.4.320.0040.04112.50
5.4.310.0080.04712.50
5.4.300.0060.03612.50
5.4.290.0080.05312.49
5.4.280.0070.05912.38
5.4.270.0090.05112.38
5.4.260.0110.05512.38
5.4.250.0080.05512.38
5.4.240.0050.05612.38
5.4.230.0070.04512.38
5.4.220.0090.04312.38
5.4.210.0040.03912.38
5.4.200.0060.03912.38
5.4.190.0090.03412.38
5.4.180.0030.03812.38
5.4.170.0070.03512.38
5.4.160.0110.03112.38
5.4.150.0050.04712.38
5.4.140.0070.05312.05
5.4.130.0050.05212.04
5.4.120.0040.04512.00
5.4.110.0080.05111.99
5.4.100.0050.04012.00
5.4.90.0070.03712.00
5.4.80.0080.04412.00
5.4.70.0060.03811.99
5.4.60.0090.03311.99
5.4.50.0040.03712.00
5.4.40.0060.03711.98
5.4.30.0060.05911.98
5.4.20.0070.03611.98
5.4.10.0090.04011.97
5.4.00.0100.05111.47
5.3.290.0070.04412.80
5.3.280.0100.03912.70
5.3.270.0050.04512.73
5.3.260.0110.04312.72
5.3.250.0190.06612.72
5.3.240.0070.06112.72
5.3.230.0090.05412.71
5.3.220.0120.06612.68
5.3.210.0080.04612.68
5.3.200.0070.05512.68
5.3.190.0080.05212.68
5.3.180.0040.04312.67
5.3.170.0090.03812.67
5.3.160.0050.04512.67
5.3.150.0090.05412.67
5.3.140.0060.05312.66
5.3.130.0060.04712.66
5.3.120.0050.05012.66
5.3.110.0070.03912.66
5.3.100.0050.03812.12
5.3.90.0080.05012.10
5.3.80.0070.03912.09
5.3.70.0050.03612.09
5.3.60.0050.03812.08
5.3.50.0110.03312.02
5.3.40.0030.04012.02
5.3.30.0100.03611.98
5.3.20.0040.03811.76
5.3.10.0090.03311.73
5.3.00.0060.04511.71
5.2.170.0050.0449.21
5.2.160.0040.0359.21
5.2.150.0050.0339.21
5.2.140.0070.0329.21
5.2.130.0040.0309.17
5.2.120.0040.0299.17
5.2.110.0080.0269.18
5.2.100.0070.0319.17
5.2.90.0090.0379.17
5.2.80.0080.0419.16
5.2.70.0100.0599.17
5.2.60.0080.0459.13
5.2.50.0070.0499.09
5.2.40.0070.0439.07
5.2.30.0030.0389.04
5.2.20.0030.0329.03
5.2.10.0040.0298.95
5.2.00.0050.0288.81
5.1.60.0090.0288.08
5.1.50.0040.0298.08
5.1.40.0060.0248.06
5.1.30.0080.0248.41
5.1.20.0040.0298.43
5.1.10.0070.0258.16
5.1.00.0030.0298.16
5.0.50.0060.0196.64
5.0.40.0040.0216.50
5.0.30.0030.0476.31
5.0.20.0040.0256.27
5.0.10.0050.0206.26
5.0.00.0030.0346.25
4.4.90.0030.0194.78
4.4.80.0080.0224.75
4.4.70.0040.0214.76
4.4.60.0000.0254.75
4.4.50.0050.0154.77
4.4.40.0060.0244.71
4.4.30.0020.0234.76
4.4.20.0080.0224.84
4.4.10.0080.0194.85
4.4.00.0050.0244.76
4.3.110.0040.0164.67
4.3.100.0040.0214.67
4.3.90.0040.0214.64
4.3.80.0050.0314.58
4.3.70.0040.0214.63
4.3.60.0050.0234.63
4.3.50.0050.0194.63
4.3.40.0090.0464.53
4.3.30.0030.0243.30
4.3.20.0070.0193.28
4.3.10.0030.0213.24
4.3.00.0130.0206.80

preferences:
50.65 ms | 401 KiB | 5 Q