3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = 'ABCD'; $offset = 0; $output = ''; while (isset($string[$offset])) $offset++; for ($i = $offset; $i > 0; $i--) { echo "(" . $string . ":" . $offset . ")\n"; $output .= $string[$offset -1]; } echo $string;

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)
8.3.70.0090.01216.63
8.3.60.0070.00716.63
8.3.50.0100.01222.83
8.3.40.0100.01018.82
8.3.30.0100.00319.04
8.3.20.0070.00020.33
8.3.10.0060.00323.48
8.3.00.0030.00619.69
8.2.180.0140.00325.92
8.2.170.0150.00622.96
8.2.160.0070.01120.47
8.2.150.0040.00424.18
8.2.140.0030.00524.66
8.2.130.0040.00426.16
8.2.120.0050.00319.49
8.2.110.0080.00022.24
8.2.100.0060.00617.72
8.2.90.0040.00419.17
8.2.80.0000.00919.46
8.2.70.0080.00017.63
8.2.60.0040.00418.16
8.2.50.0080.00018.07
8.2.40.0060.00318.28
8.2.30.0040.00419.42
8.2.20.0000.00717.62
8.2.10.0040.00418.10
8.2.00.0060.00317.80
8.1.280.0000.01525.92
8.1.270.0050.00323.96
8.1.260.0000.00726.35
8.1.250.0050.00328.09
8.1.240.0090.00023.68
8.1.230.0070.00419.07
8.1.220.0030.00717.76
8.1.210.0050.00318.77
8.1.200.0040.00417.36
8.1.190.0040.00417.51
8.1.180.0080.00019.13
8.1.170.0000.00818.58
8.1.160.0040.00418.85
8.1.150.0040.00418.95
8.1.140.0050.00217.45
8.1.130.0000.00717.82
8.1.120.0000.00717.48
8.1.110.0000.00817.44
8.1.100.0000.00717.46
8.1.90.0000.00717.43
8.1.80.0000.00717.36
8.1.70.0000.00717.38
8.1.60.0060.00317.58
8.1.50.0060.00617.49
8.1.40.0060.00617.53
8.1.30.0000.00817.66
8.1.20.0030.00617.68
8.1.10.0030.00517.43
8.1.00.0000.00917.45
8.0.300.0060.00318.77
8.0.290.0040.00417.05
8.0.280.0090.00018.50
8.0.270.0000.00817.25
8.0.260.0000.00617.32
8.0.250.0000.00716.94
8.0.240.0030.00317.02
8.0.230.0000.00716.86
8.0.220.0070.00016.77
8.0.210.0070.00016.86
8.0.200.0000.00716.96
8.0.190.0000.00716.84
8.0.180.0000.00716.96
8.0.170.0050.00216.96
8.0.160.0040.00416.87
8.0.150.0000.00816.72
8.0.140.0030.00316.82
8.0.130.0000.00613.25
8.0.120.0040.00416.75
8.0.110.0070.00016.81
8.0.100.0000.00716.88
8.0.90.0040.00416.86
8.0.80.0060.00916.77
8.0.70.0040.00416.77
8.0.60.0040.00416.71
8.0.50.0040.00416.91
8.0.30.0080.01117.09
8.0.20.0140.00717.40
8.0.10.0070.00316.82
8.0.00.0100.00716.57
7.4.330.0030.00315.02
7.4.320.0090.00016.52
7.4.300.0070.00016.64
7.4.290.0000.00716.52
7.4.280.0080.00016.57
7.4.270.0000.00716.51
7.4.260.0000.00616.48
7.4.250.0040.00416.36
7.4.240.0070.00016.55
7.4.230.0000.00716.32
7.4.220.0060.01516.34
7.4.210.0070.00716.48
7.4.200.0070.00016.33
7.4.160.0090.00616.29
7.4.150.0130.00717.40
7.4.140.0050.01517.86
7.4.130.0090.00816.43
7.4.120.0070.00916.56
7.4.110.0060.01016.52
7.4.100.0030.01316.32
7.4.90.0070.01016.47
7.4.80.0150.00919.39
7.4.70.0120.00616.46
7.4.60.0060.01216.46
7.4.50.0030.00616.39
7.4.40.0160.00316.63
7.4.30.0090.00616.62
7.4.00.0080.00615.04
7.3.330.0020.00213.26
7.3.320.0000.00513.05
7.3.310.0030.00316.32
7.3.300.0030.00316.30
7.3.290.0040.01116.34
7.3.280.0070.00816.35
7.3.270.0240.00017.40
7.3.260.0030.01316.37
7.3.250.0060.01216.49
7.3.240.0100.00716.50
7.3.230.0070.01016.39
7.3.210.0080.01516.30
7.3.200.0090.01219.39
7.3.190.0100.00716.32
7.3.180.0140.00616.57
7.3.170.0090.01016.67
7.3.160.0110.00716.38
7.3.120.0110.00814.75
7.3.110.0020.01414.78
7.3.100.0030.01014.79
7.3.90.0050.01014.93
7.3.80.0040.01015.00
7.3.70.0030.00914.83
7.3.60.0040.01014.89
7.3.50.0030.01214.60
7.3.40.0080.00514.77
7.3.30.0050.00814.85
7.3.20.0100.00116.70
7.3.10.0070.00516.70
7.3.00.0030.01116.48
7.2.330.0090.00916.47
7.2.320.0130.00916.73
7.2.310.0160.00616.68
7.2.300.0120.00616.61
7.2.290.0150.00916.61
7.2.250.0100.01015.36
7.2.240.0090.00914.77
7.2.230.0040.01015.05
7.2.220.0070.00515.08
7.2.210.0060.01015.12
7.2.200.0040.00615.15
7.2.190.0070.00514.99
7.2.180.0000.01215.03
7.2.170.0050.00914.90
7.2.160.0030.01115.06
7.2.150.0070.00716.98
7.2.140.0000.01017.07
7.2.130.0070.00717.03
7.2.120.0030.00816.93
7.2.110.0070.00816.92
7.2.100.0070.00716.97
7.2.90.0050.01116.99
7.2.80.0070.01016.96
7.2.70.0030.01216.89
7.2.60.0020.01316.95
7.2.50.0050.00517.09
7.2.40.0080.00216.94
7.2.30.0040.01116.96
7.2.20.0080.00816.81
7.2.10.0040.01016.92
7.2.00.0070.00717.84
7.1.330.0040.01215.94
7.1.320.0060.00615.73
7.1.310.0110.00115.94
7.1.300.0070.00815.84
7.1.290.0110.00515.71
7.1.280.0060.00715.73
7.1.270.0030.01015.76
7.1.260.0030.00915.69
7.1.250.0020.01115.81
7.1.200.0000.01315.66
7.1.100.0000.01318.13
7.1.70.0060.00617.28
7.1.60.0030.02119.34
7.1.50.0090.00917.07
7.1.00.0000.08022.43
7.0.200.0000.00816.96
7.0.140.0030.06322.08
7.0.110.0730.06719.97
7.0.100.0700.07019.97
7.0.90.0630.08319.92
7.0.80.0500.05019.97
7.0.70.0500.04720.05
7.0.60.0770.07320.01
7.0.50.0570.08319.99
7.0.40.0100.06719.76
7.0.30.0030.06719.78
7.0.20.0070.08319.68
7.0.10.0070.07019.73
7.0.00.0030.08319.88
5.6.280.0070.07020.89
5.6.260.0170.07320.50
5.6.250.0100.08020.64
5.6.240.0070.09020.55
5.6.230.0070.08320.46
5.6.220.0100.08020.66
5.6.210.0200.06020.59
5.6.200.0070.09020.65
5.6.190.0030.09020.64
5.6.180.0070.08020.62
5.6.170.0030.08320.59
5.6.160.0100.04720.54
5.6.150.0030.08720.61
5.6.140.0100.07720.69
5.6.130.0070.08720.64
5.6.120.0070.08020.63
5.6.110.0030.08020.57
5.6.100.0130.04320.83
5.6.90.0100.08320.67
5.6.80.0100.09020.00
5.6.70.0070.07720.07
5.6.60.0100.06019.85
5.6.50.0070.07719.97
5.6.40.0170.06720.06
5.6.30.0100.07019.92
5.6.20.0000.08319.90
5.6.10.0100.07019.99
5.6.00.0070.04720.01
5.5.380.0170.07317.62
5.5.370.0070.08017.54
5.5.360.0100.07017.48
5.5.350.0200.06717.77
5.5.340.0170.07018.01
5.5.330.0030.07318.03
5.5.320.0070.07017.99
5.5.310.0100.06318.12
5.5.300.0000.09317.77
5.5.290.0130.08318.12
5.5.280.0100.08018.09
5.5.270.0000.08718.00
5.5.260.0070.08317.84
5.5.250.0130.07717.95
5.5.240.0070.07317.37
5.5.230.0030.05017.63
5.5.220.0170.07017.62
5.5.210.0100.06717.24
5.5.200.0100.07717.20
5.5.190.0100.04317.20
5.5.180.0100.06717.20
5.5.160.0070.07317.45
5.5.150.0100.07317.60
5.5.140.0070.07017.11
5.5.130.0100.07017.35
5.5.120.0100.06317.19
5.5.110.0100.07717.33
5.5.100.0030.08017.15
5.5.90.0070.06317.50
5.5.80.0070.08017.10
5.5.70.0070.07017.37
5.5.60.0130.06017.35
5.5.50.0070.07717.37
5.5.40.0100.07317.26
5.5.30.0000.08717.37
5.5.20.0170.07017.09
5.5.10.0070.07017.37
5.5.00.0070.04017.25
5.4.450.0070.06319.29
5.4.440.0100.08319.50
5.4.430.0100.08319.48
5.4.420.0170.06719.33
5.4.410.0100.04719.45
5.4.400.0170.06019.01
5.4.390.0070.07018.96
5.4.380.0130.03719.00
5.4.370.0070.04319.01
5.4.360.0030.08019.11
5.4.350.0030.07319.03
5.4.340.0070.07719.27
5.4.320.0100.04319.17
5.4.310.0130.07018.95
5.4.300.0030.08019.03
5.4.290.0230.05719.02
5.4.280.0070.05019.02
5.4.270.0200.06019.00
5.4.260.0170.06719.00
5.4.250.0100.06718.98
5.4.240.0070.05719.15
5.4.230.0030.07719.02
5.4.220.0100.06319.02
5.4.210.0170.07318.97
5.4.200.0130.07019.02
5.4.190.0070.07018.94
5.4.180.0070.07319.23
5.4.170.0100.03019.26
5.4.160.0030.03718.96
5.4.150.0030.04019.23
5.4.140.0070.06316.46
5.4.130.0070.06316.20
5.4.120.0000.07716.41
5.4.110.0030.03316.14
5.4.100.0030.03316.28
5.4.90.0070.07316.13
5.4.80.0000.07016.39
5.4.70.0070.06016.47
5.4.60.0030.03316.13
5.4.50.0100.05716.35
5.4.40.0100.06316.53
5.4.30.0070.06716.50
5.4.20.0030.07316.50
5.4.10.0100.07316.37
5.4.00.0030.07715.89
5.3.290.0100.07014.49
5.3.280.0030.07714.46
5.3.270.0000.04714.49
5.3.260.0070.03314.66
5.3.250.0030.03714.39
5.3.240.0130.06014.55
5.3.230.0030.04714.70
5.3.220.0000.06314.41
5.3.210.0030.07314.66
5.3.200.0000.06714.44
5.3.190.0000.07714.49
5.3.180.0030.06014.58
5.3.170.0130.07014.48
5.3.160.0030.07314.50
5.3.150.0000.04014.52
5.3.140.0100.06714.46
5.3.130.0070.06014.38
5.3.120.0130.07014.56
5.3.110.0170.05714.48
5.3.100.0070.08013.96
5.3.90.0070.07313.80
5.3.80.0070.05713.97
5.3.70.0070.04013.95
5.3.60.0070.07713.85
5.3.50.0130.06313.95
5.3.40.0070.07313.86
5.3.30.0100.07013.96
5.3.20.0100.06713.47
5.3.10.0100.07013.66
5.3.00.0100.07013.65
5.2.170.0030.06310.93
5.2.160.0070.05711.22
5.2.150.0130.03011.04
5.2.140.0030.06710.92
5.2.130.0100.06011.04
5.2.120.0000.05711.02
5.2.110.0030.06011.00
5.2.100.0000.06711.00
5.2.90.0030.03311.05
5.2.80.0000.07011.09
5.2.70.0070.03711.02
5.2.60.0100.05010.99
5.2.50.0070.05710.94
5.2.40.0030.06010.77
5.2.30.0100.05710.86
5.2.20.0130.03311.02
5.2.10.0030.03310.85
5.2.00.0070.05310.73
5.1.60.0070.02710.58
5.1.50.0070.05010.58
5.1.40.0030.05310.58
5.1.30.0000.06010.58
5.1.20.0030.05310.58
5.1.10.0030.03310.58
5.1.00.0070.05010.58
5.0.50.0100.04010.58
5.0.40.0000.05010.58
5.0.30.0100.04710.58
5.0.20.0030.03010.58
5.0.10.0030.04310.58
5.0.00.0000.07010.58
4.4.90.0000.02310.58
4.4.80.0000.03710.58
4.4.70.0000.03710.58
4.4.60.0030.03010.58
4.4.50.0030.02710.58
4.4.40.0070.04710.58
4.4.30.0000.03310.58
4.4.20.0000.03710.58
4.4.10.0070.03010.58
4.4.00.0100.04310.58
4.3.110.0000.04010.58
4.3.100.0030.03710.58
4.3.90.0070.03310.58
4.3.80.0030.05310.58
4.3.70.0000.03310.58
4.3.60.0030.03010.58
4.3.50.0030.03310.58
4.3.40.0030.04310.58
4.3.30.0030.02010.58
4.3.20.0030.03710.58
4.3.10.0030.03310.58
4.3.00.0030.03010.58

preferences:
58.74 ms | 401 KiB | 5 Q