3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "abcd"; $len = strlen($str); $pos = floor($len/2); for($i = $len; $i > $pos; $i--) { echo ord($str[$i-1])."\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)
8.3.60.0030.01016.63
8.3.50.0140.00622.84
8.3.40.0070.00718.73
8.3.30.0090.00619.09
8.3.20.0040.00420.34
8.3.10.0000.00721.91
8.3.00.0080.00019.14
8.2.180.0140.00416.38
8.2.170.0090.00922.96
8.2.160.0100.00320.52
8.2.150.0040.00424.18
8.2.140.0000.00824.66
8.2.130.0060.00326.16
8.2.120.0080.00020.75
8.2.110.0090.00021.93
8.2.100.0100.00319.64
8.2.90.0040.00419.40
8.2.80.0030.00517.97
8.2.70.0040.00417.63
8.2.60.0060.00318.05
8.2.50.0040.00418.07
8.2.40.0000.00919.88
8.2.30.0000.01018.32
8.2.20.0000.00917.86
8.2.10.0030.00518.12
8.2.00.0040.00417.80
8.1.280.0040.01125.92
8.1.270.0040.00422.17
8.1.260.0080.00026.35
8.1.250.0080.00028.09
8.1.240.0100.00021.91
8.1.230.0070.00419.15
8.1.220.0000.00817.74
8.1.210.0040.00418.77
8.1.200.0000.00817.23
8.1.190.0040.00417.23
8.1.180.0000.00818.10
8.1.170.0030.00518.70
8.1.160.0000.00821.97
8.1.150.0040.00418.95
8.1.140.0040.00417.33
8.1.130.0030.00317.86
8.1.120.0030.00317.36
8.1.110.0040.00417.50
8.1.100.0070.00017.43
8.1.90.0050.00217.36
8.1.80.0000.00717.51
8.1.70.0030.00317.50
8.1.60.0080.00017.58
8.1.50.0030.00517.43
8.1.40.0040.00417.49
8.1.30.0000.00817.69
8.1.20.0040.00417.52
8.1.10.0050.00217.57
8.1.00.0000.00817.55
8.0.300.0060.00318.77
8.0.290.0000.00717.18
8.0.280.0000.00818.38
8.0.270.0000.00717.18
8.0.260.0060.00017.16
8.0.250.0000.00616.82
8.0.240.0070.00016.98
8.0.230.0040.00417.02
8.0.220.0040.00416.80
8.0.210.0000.00716.93
8.0.200.0030.00316.95
8.0.190.0050.00316.82
8.0.180.0040.00416.93
8.0.170.0000.00816.80
8.0.160.0050.00316.81
8.0.150.0070.00016.90
8.0.140.0070.00316.79
8.0.130.0080.00013.29
8.0.120.0000.00816.82
8.0.110.0040.00416.77
8.0.100.0000.00716.92
8.0.90.0030.00516.76
8.0.80.0160.00816.95
8.0.70.0040.00416.90
8.0.60.0000.00716.65
8.0.50.0030.00616.68
8.0.30.0130.00616.97
8.0.20.0100.01317.40
8.0.10.0050.00316.94
8.0.00.0130.00616.61
7.4.330.0070.00015.03
7.4.320.0030.00316.43
7.4.300.0060.00016.55
7.4.290.0030.00316.52
7.4.280.0040.00416.54
7.4.270.0000.00816.46
7.4.260.0030.00616.44
7.4.250.0000.00716.46
7.4.240.0020.00516.44
7.4.230.0030.00316.55
7.4.220.0120.01216.48
7.4.210.0060.01316.56
7.4.200.0030.00316.34
7.4.160.0170.00316.50
7.4.150.0100.00717.40
7.4.140.0110.01017.86
7.4.130.0110.00716.37
7.4.120.0120.00616.51
7.4.110.0110.00816.30
7.4.100.0150.00616.47
7.4.90.0100.00716.45
7.4.80.0160.00719.39
7.4.70.0030.01616.30
7.4.60.0110.00516.60
7.4.50.0000.00516.52
7.4.40.0120.00316.29
7.4.30.0030.01216.31
7.4.00.0070.01015.06
7.3.330.0020.00213.07
7.3.320.0060.00013.27
7.3.310.0000.00716.22
7.3.300.0000.00716.35
7.3.290.0070.00716.31
7.3.280.0110.00716.29
7.3.270.0130.00917.40
7.3.260.0140.01016.65
7.3.250.0100.00716.56
7.3.240.0120.00616.52
7.3.230.0060.01216.39
7.3.210.0060.01016.29
7.3.200.0190.00319.39
7.3.190.0090.01216.39
7.3.180.0130.00316.50
7.3.170.0070.01016.38
7.3.160.0080.00816.46
7.2.330.0130.00616.83
7.2.320.0120.00616.75
7.2.310.0100.00716.75
7.2.300.0080.00816.82
7.2.290.0090.00916.45
7.2.00.0120.00019.18
7.1.100.0100.01016.69
7.1.70.0070.00017.09
7.1.60.0100.01419.57
7.1.50.0040.01816.91
7.1.00.0030.07322.36
7.0.200.0000.00816.84
7.0.140.0030.04322.09
7.0.60.0070.06719.94
7.0.50.0070.06317.82
7.0.40.0070.06320.02
7.0.30.0200.04020.09
7.0.20.0270.08020.33
7.0.10.0030.09320.03
7.0.00.0030.09020.17
5.6.280.0030.07321.11
5.6.210.0100.06720.71
5.6.200.0070.04318.18
5.6.190.0100.04020.48
5.6.180.0470.07320.63
5.6.170.0200.06020.47
5.6.160.0100.07720.61
5.6.150.0170.04718.07
5.6.140.0030.08318.21
5.6.130.0030.08318.17
5.6.120.0070.07720.89
5.6.110.0000.04321.00
5.6.100.0100.06021.08
5.6.90.0100.08321.07
5.6.80.0100.08020.35
5.5.350.0230.07720.32
5.5.340.0030.04017.89
5.5.330.0070.04020.25
5.5.320.0270.04020.17
5.5.310.0400.06320.27
5.5.300.0000.05317.93
5.5.290.0100.04317.91
5.5.280.0000.04320.84
5.5.270.0130.04020.86
5.5.260.0100.08020.64
5.5.250.0070.06020.61
5.5.240.0100.06020.18
5.4.450.0870.07019.27
5.4.440.0070.07019.32
5.4.430.0100.05319.46
5.4.420.0100.06019.52
5.4.410.0030.06319.57
5.4.400.0100.05319.00
5.4.390.0030.06019.13
5.4.380.0100.05319.14
5.4.370.0170.05018.68
5.4.360.0130.05018.77
5.4.350.0200.04718.78
5.4.340.0100.05318.65
5.4.320.0100.05718.59
5.4.310.0200.04718.74
5.4.300.0230.04318.61
5.4.290.0100.05318.56
5.4.280.0100.05318.49
5.4.270.0100.05718.71
5.4.260.0170.04718.77
5.4.250.0170.05018.68
5.4.240.0230.04318.60
5.4.230.0130.05018.57
5.4.220.0100.05718.64
5.4.210.0270.04718.45
5.4.200.0100.05316.50
5.4.190.0100.05318.70
5.4.180.0130.05718.67
5.4.170.0100.05718.64
5.4.160.0200.05718.63
5.4.150.0130.05318.60
5.4.140.0230.06716.14
5.4.130.0100.05716.22
5.4.120.0100.05016.32
5.4.110.0130.04716.17
5.4.100.0100.05316.20
5.4.90.0170.05016.26
5.4.80.0130.05016.07
5.4.70.0070.05716.14
5.4.60.0130.05016.21
5.4.50.0100.05016.19
5.4.40.0100.05316.05
5.4.30.0130.05016.00
5.4.20.0100.05716.02
5.4.10.0170.04716.15
5.4.00.0130.05015.62
5.3.290.0170.07314.64
5.3.280.0200.06314.64
5.3.270.0030.06314.53
5.3.260.0230.04314.65
5.3.250.0130.05014.56
5.3.240.0170.05314.59
5.3.230.0130.05314.50
5.3.220.0100.05314.46
5.3.210.0170.05014.66
5.3.200.0170.04714.52
5.3.190.0130.05014.58
5.3.180.0200.04314.51
5.3.170.0130.05014.54
5.3.160.0170.04714.65
5.3.150.0100.05314.52
5.3.140.0300.04314.45
5.3.130.0130.05314.53
5.3.120.0130.05314.45
5.3.110.0130.05314.50
5.3.100.0100.05714.13
5.3.90.0170.04713.91
5.3.80.0130.05013.93
5.3.70.0130.05013.97
5.3.60.0070.05713.98
5.3.50.0100.05313.94
5.3.40.0100.05313.93
5.3.30.0170.05013.85
5.3.20.0170.04713.67
5.3.10.0170.04313.70
5.3.00.0170.04713.62
5.2.170.0200.03311.28
5.2.160.0100.04311.12
5.2.150.0100.04311.12
5.2.140.0100.04311.10
5.2.130.0170.03311.08
5.2.120.0170.03311.06
5.2.110.0100.04011.06
5.2.100.0070.04311.08
5.2.90.0100.04011.08
5.2.80.0170.03711.08
5.2.70.0170.03711.07
5.2.60.0030.05011.01
5.2.50.0170.05711.05
5.2.40.0170.03311.00
5.2.30.0130.03710.91
5.2.20.0100.04010.94
5.2.10.0170.03310.90
5.2.00.0200.03010.68
5.1.60.0030.0409.98
5.1.50.0130.03010.10
5.1.40.0070.0379.99
5.1.30.0170.03010.54
5.1.20.0100.03710.48
5.1.10.0130.03310.04
5.1.00.0100.03310.27
5.0.50.0030.0308.52
5.0.40.0030.0308.40
5.0.30.0070.0438.35
5.0.20.0030.0338.27
5.0.10.0070.0278.18
5.0.00.0030.0438.29
4.4.90.0100.0175.94
4.4.80.0070.0205.89
4.4.70.0070.0205.89
4.4.60.0030.0235.88
4.4.50.0100.0175.95
4.4.40.0030.0375.85
4.4.30.0130.0135.90
4.4.20.0100.0175.98
4.4.10.0070.0235.94
4.4.00.0070.0335.96
4.3.110.0070.0235.85
4.3.100.0100.0205.92
4.3.90.0030.0235.91
4.3.80.0030.0335.90
4.3.70.0000.0275.82
4.3.60.0030.0235.78
4.3.50.0130.0175.83
4.3.40.0030.0375.78
4.3.30.0030.0234.59
4.3.20.0000.0274.63
4.3.10.0000.0234.50
4.3.00.0170.0137.02

preferences:
54.31 ms | 401 KiB | 5 Q