3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "abcdefghijklmn"; $print = strrev($str); $st=""; $size = strlen($print); for($i = 0;$i<$size;$i=$i+2) { if($i+1 < $size ) $st .= substr($print,$i,$i+1); }echo $st;

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)
8.3.60.0070.00718.43
8.3.50.0280.00521.02
8.3.40.0140.00718.84
8.3.30.0080.00619.17
8.3.20.0100.00720.13
8.3.10.0040.00422.06
8.3.00.0040.00420.71
8.2.180.0110.00716.38
8.2.170.0130.00622.96
8.2.160.0070.00719.11
8.2.150.0040.00424.18
8.2.140.0090.00024.66
8.2.130.0150.00026.16
8.2.120.0040.00419.67
8.2.110.0060.00322.25
8.2.100.0040.00719.31
8.2.90.0080.00019.20
8.2.80.0000.00818.03
8.2.70.0030.00617.63
8.2.60.0060.00318.05
8.2.50.0030.00618.07
8.2.40.0070.00018.34
8.2.30.0020.00518.18
8.2.20.0030.00517.72
8.2.10.0040.00417.72
8.2.00.0040.00717.74
8.1.280.0110.00425.92
8.1.270.0080.00020.19
8.1.260.0080.00026.35
8.1.250.0000.00728.09
8.1.240.0030.00623.96
8.1.230.0090.00319.04
8.1.220.0080.00017.78
8.1.210.0050.00318.77
8.1.200.0030.00617.22
8.1.190.0000.00817.30
8.1.180.0050.00318.57
8.1.170.0000.00818.51
8.1.160.0000.00722.05
8.1.150.0000.00918.53
8.1.140.0070.00017.35
8.1.130.0050.00317.92
8.1.120.0030.00517.31
8.1.110.0070.00417.23
8.1.100.0040.00317.38
8.1.90.0000.00717.29
8.1.80.0020.00517.45
8.1.70.0070.00017.42
8.1.60.0030.00517.41
8.1.50.0000.00817.36
8.1.40.0050.00317.46
8.1.30.0030.00617.43
8.1.20.0000.00817.54
8.1.10.0000.00817.50
8.1.00.0000.00717.45
8.0.300.0000.00818.77
8.0.290.0070.00017.05
8.0.280.0030.00318.31
8.0.270.0000.00717.28
8.0.260.0000.00618.35
8.0.250.0000.00716.96
8.0.240.0000.00816.92
8.0.230.0030.00316.78
8.0.220.0080.00016.86
8.0.210.0050.00216.71
8.0.200.0000.00716.87
8.0.190.0000.00716.82
8.0.180.0040.00416.73
8.0.170.0050.00316.77
8.0.160.0030.00516.71
8.0.150.0030.00616.68
8.0.140.0040.00416.77
8.0.130.0030.00313.21
8.0.120.0040.00416.77
8.0.110.0000.00816.76
8.0.100.0040.00416.71
8.0.90.0070.00016.70
8.0.80.0100.00716.81
8.0.70.0050.00216.81
8.0.60.0070.00016.85
8.0.50.0050.00216.69
8.0.30.0090.00917.07
8.0.20.0100.01217.40
8.0.10.0000.00716.86
8.0.00.0070.01016.79
7.4.330.0050.00015.00
7.4.320.0000.00616.53
7.4.300.0000.00616.54
7.4.290.0030.00316.45
7.4.280.0070.00416.55
7.4.270.0000.00716.43
7.4.260.0030.00616.28
7.4.250.0080.00016.50
7.4.240.0020.00516.42
7.4.230.0030.00316.61
7.4.220.0030.01516.59
7.4.210.0080.00616.49
7.4.200.0000.00716.46
7.4.190.0030.00316.43
7.4.160.0100.01016.23
7.4.150.0090.00917.40
7.4.140.0140.00317.86
7.4.130.0120.00516.43
7.4.120.0110.00616.56
7.4.110.0000.01716.21
7.4.100.0130.00316.50
7.4.90.0060.01116.35
7.4.80.0090.01219.39
7.4.70.0130.00516.38
7.4.60.0030.01316.47
7.4.50.0030.00616.43
7.4.40.0040.00822.77
7.4.30.0120.00316.39
7.4.00.0070.01014.82
7.3.330.0020.00213.20
7.3.320.0050.00012.98
7.3.310.0030.00416.32
7.3.300.0070.00016.16
7.3.290.0190.00016.15
7.3.280.0080.00716.24
7.3.270.0100.00717.40
7.3.260.0070.01116.21
7.3.250.0110.00616.40
7.3.240.0120.00616.29
7.3.230.0050.01216.39
7.3.210.0100.00616.16
7.3.200.0070.01019.39
7.3.190.0090.00916.52
7.3.180.0000.01716.55
7.3.170.0080.00816.30
7.3.160.0120.00316.38
7.3.120.0040.01414.64
7.3.110.0100.00714.92
7.3.100.0000.01514.78
7.3.90.0060.00614.80
7.3.80.0070.00314.82
7.3.70.0000.01314.69
7.3.60.0040.01114.93
7.3.50.0060.00314.82
7.3.40.0000.01614.61
7.3.30.0070.01014.45
7.3.20.0070.01016.75
7.3.10.0040.01116.67
7.3.00.0060.00616.45
7.2.330.0110.00716.62
7.2.320.0070.01616.53
7.2.310.0160.00716.54
7.2.300.0120.00416.65
7.2.290.0120.00416.54
7.2.250.0110.00714.92
7.2.240.0070.01315.22
7.2.230.0080.00415.22
7.2.220.0060.00614.93
7.2.210.0070.00715.00
7.2.200.0030.00715.00
7.2.190.0030.01214.89
7.2.180.0070.01115.11
7.2.170.0070.01114.92
7.2.160.0030.00915.15
7.2.150.0070.01016.91
7.2.140.0090.00616.89
7.2.130.0030.01316.69
7.2.120.0060.00917.05
7.2.110.0030.00916.88
7.2.100.0030.01016.69
7.2.90.0060.00616.90
7.2.80.0070.01016.75
7.2.70.0060.01016.88
7.2.60.0070.00417.01
7.2.50.0030.01216.95
7.2.40.0040.01416.95
7.2.30.0040.01116.97
7.2.20.0070.00416.71
7.2.10.0070.00716.71
7.2.00.0100.00317.00
7.1.330.0030.01215.57
7.1.320.0070.00716.04
7.1.310.0070.00715.97
7.1.300.0030.01315.76
7.1.290.0060.00616.03
7.1.280.0100.00715.52
7.1.270.0060.00915.78
7.1.260.0060.00915.52
7.1.250.0120.00315.83
7.1.70.0040.00716.89
7.1.60.0090.01519.82
7.1.50.0080.00816.96
7.1.00.0000.04722.54
7.0.200.0080.00816.65
7.0.140.0000.07721.97
7.0.60.0100.06019.93
7.0.50.0030.04717.79
7.0.40.0130.05020.20
7.0.30.0370.07320.34
7.0.20.0200.06720.00
7.0.10.0230.04720.09
7.0.00.0000.04720.12
5.6.280.0070.07020.99
5.6.210.0030.06320.60
5.6.200.0030.09018.18
5.6.190.0030.09020.56
5.6.180.2970.04720.27
5.6.170.0270.07320.54
5.6.160.0100.04320.48
5.6.150.0000.04318.16
5.6.140.0030.04718.20
5.6.130.0070.07318.04
5.6.120.0130.06321.00
5.6.110.0100.06020.96
5.6.100.0030.04021.04
5.6.90.0070.08321.13
5.6.80.0030.08320.38
5.6.70.0200.07720.25
5.5.350.0130.06720.30
5.5.340.0170.07017.92
5.5.330.0100.04720.57
5.5.320.0230.07720.32
5.5.310.0370.07720.16
5.5.300.0070.08717.90
5.5.290.0000.04717.87
5.5.280.0070.04020.76
5.5.270.0130.07720.96
5.5.260.0130.07720.65
5.5.250.0070.06720.54
5.5.240.0170.07020.12
5.4.450.0830.07019.48
5.4.440.0800.05019.48
5.4.430.0770.06019.54
5.4.420.0100.05719.54
5.4.410.0100.05319.00
5.4.400.0400.05318.71
5.4.390.0470.07018.56
5.4.380.0300.05718.70
5.4.370.0230.04018.57
5.4.360.0100.05718.73
5.4.350.0090.03811.97
5.4.340.0090.05011.97
5.4.320.0090.03612.46
5.4.310.0080.04212.45
5.4.300.0080.03612.46
5.4.290.0040.03912.45
5.4.280.0060.03512.35
5.4.270.0040.03712.35
5.4.260.0060.04212.35
5.4.250.0070.06018.65
5.4.240.0070.06018.79
5.4.230.0230.03718.65
5.4.220.0000.06718.92
5.4.210.0070.05318.92
5.4.200.0100.04718.90
5.4.190.0000.06018.81
5.4.180.0100.05318.69
5.4.170.0070.06018.73
5.4.160.0130.04718.77
5.4.150.0230.04318.68
5.4.140.0100.04716.44
5.4.130.0100.04716.25
5.4.120.0100.04316.23
5.4.110.0070.05016.34
5.4.100.0130.04716.39
5.4.90.0100.04316.45
5.4.80.0070.05316.33
5.4.70.0000.08016.41
5.4.60.0130.04316.32
5.4.50.0130.04716.39
5.4.40.0070.05016.44
5.4.30.0030.05316.47
5.4.20.0070.05016.31
5.4.10.0030.05316.50
5.4.00.0130.05715.73
5.3.290.0040.04512.80
5.3.280.0100.05014.48
5.3.270.0170.05014.45
5.3.260.0130.04714.47
5.3.250.0070.05314.49
5.3.240.0070.05314.61
5.3.230.0070.05014.61
5.3.220.0100.05014.34
5.3.210.0230.04314.44
5.3.200.0070.05314.57
5.3.190.0070.05314.58
5.3.180.0100.05014.25
5.3.170.0170.04714.43
5.3.160.0100.04714.66
5.3.150.0130.04714.61
5.3.140.0070.05714.33
5.3.130.0170.05314.43
5.3.120.0130.04714.64
5.3.110.0070.06314.70
5.3.100.0130.04714.05
5.3.90.0100.05014.02
5.3.80.0100.04713.87
5.3.70.0070.05713.71
5.3.60.0030.05314.02
5.3.50.0030.05013.86
5.3.40.0100.05313.97
5.3.30.0070.04713.95
5.3.20.0070.05013.55
5.3.10.0100.04313.50
5.3.00.0070.04713.65
5.2.170.0030.06011.15
5.2.160.0030.04711.04
5.2.150.0070.04011.25
5.2.140.0070.03710.89
5.2.130.0030.04310.86
5.2.120.0030.04011.02
5.2.110.0030.04011.01
5.2.100.0130.03011.02
5.2.90.0030.04011.11
5.2.80.0100.03711.18
5.2.70.0070.05711.20
5.2.60.0000.04711.16
5.2.50.0000.04711.02
5.2.40.0000.04711.00
5.2.30.0000.04710.99
5.2.20.0030.04010.86
5.2.10.0070.03710.94
5.2.00.0000.04310.93
5.1.60.0070.0339.93
5.1.50.0030.05310.10
5.1.40.0070.03310.04
5.1.30.0070.05710.31
5.1.20.0000.04310.11
5.1.10.0100.0309.93
5.1.00.0070.03710.15
5.0.50.0030.0278.50
5.0.40.0030.0278.31
5.0.30.0000.0438.36
5.0.20.0000.0308.23
5.0.10.0030.0278.23
5.0.00.0000.0438.20
4.4.90.0000.0236.47
4.4.80.0070.0206.42
4.4.70.0030.0206.42
4.4.60.0000.0236.42
4.4.50.0030.0306.40
4.4.40.0000.0376.34
4.4.30.0030.0206.29
4.4.20.0070.0176.25
4.4.10.0000.0276.21
4.4.00.0030.0336.19
4.3.110.0070.0176.14
4.3.100.0100.0136.14
4.3.90.0070.0176.14
4.3.80.0000.0336.14
4.3.70.0000.0206.14
4.3.60.0000.0236.14
4.3.50.0000.0236.14
4.3.40.0070.0276.14
4.3.30.0000.0236.14
4.3.20.0030.0206.14
4.3.10.0000.0236.14
4.3.00.0100.0277.68

preferences:
32.08 ms | 401 KiB | 5 Q