3v4l.org

run code in 300+ PHP versions simultaneously
<?php function revert($str) { $a = ''; for($i = 0; $str{$i}; $i++) { $a = $str{$i} . $a; } return $a; } revert('abcdefgh');

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)
8.3.60.0070.01318.43
8.3.50.0050.01017.24
8.3.40.0090.01218.58
8.3.30.0070.01418.43
8.3.20.0050.00318.48
8.3.10.0000.00820.44
8.3.00.0050.00517.25
8.2.180.0100.01016.32
8.2.170.0120.00322.96
8.2.160.0100.00322.11
8.2.150.0090.00924.18
8.2.140.0080.00024.66
8.2.130.0090.00026.16
8.2.120.0000.00819.76
8.2.110.0100.00021.14
8.2.100.0080.00417.78
8.2.90.0030.00618.85
8.2.80.0040.00417.80
8.2.70.0050.00517.38
8.2.60.0040.00417.91
8.2.50.0080.00018.07
8.2.40.0080.00019.76
8.2.30.0090.00017.84
8.2.20.0040.00417.46
8.2.10.0040.00417.62
8.2.00.0040.00417.54
8.1.280.0070.00725.92
8.1.270.0000.00723.99
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0100.01020.75
8.1.230.0070.00420.95
8.1.220.0000.00817.74
8.1.210.0000.00818.82
8.1.200.0000.00817.23
8.1.190.0000.00717.41
8.1.180.0090.00018.10
8.1.170.0000.00718.68
8.1.160.0070.00018.66
8.1.150.0040.00418.57
8.1.140.0050.00317.31
8.1.130.0030.00317.85
8.1.120.0050.00217.23
8.1.110.0000.00717.30
8.1.100.0000.00717.30
8.1.90.0000.00717.32
8.1.80.0040.00417.30
8.1.70.0000.00717.33
8.1.60.0000.00717.46
8.1.50.0030.00617.23
8.1.40.0000.00717.44
8.1.30.0060.00317.57
8.1.20.0030.00617.44
8.1.10.0040.00417.38
8.1.00.0070.00017.34
8.0.300.0070.00019.91
8.0.290.0000.00716.63
8.0.280.0000.00718.30
8.0.270.0000.00816.99
8.0.260.0000.00616.66
8.0.250.0000.00716.80
8.0.240.0000.01016.90
8.0.230.0000.00716.83
8.0.220.0040.00416.75
8.0.210.0030.00316.70
8.0.200.0040.00416.87
8.0.190.0030.00316.86
8.0.180.0030.00616.82
8.0.170.0110.00016.84
8.0.160.0000.00716.83
8.0.150.0030.00616.65
8.0.140.0080.00016.75
8.0.130.0030.00313.25
8.0.120.0040.00416.75
8.0.110.0030.00616.76
8.0.100.0040.00416.67
8.0.90.0000.00716.82
8.0.80.0030.01316.72
8.0.70.0030.00516.88
8.0.60.0000.00716.75
8.0.50.0070.00016.63
8.0.30.0090.01016.82
8.0.20.0060.01217.40
8.0.10.0030.00516.97
8.0.00.0070.01116.62
7.4.330.0030.00313.43
7.4.320.0030.00316.63
7.4.300.0000.00616.60
7.4.290.0080.00016.50
7.4.280.0040.00416.61
7.4.270.0000.00816.64
7.4.260.0000.00513.16
7.4.250.0000.00816.48
7.4.240.0000.00716.39
7.4.230.0030.00316.47
7.4.220.0070.01116.44
7.4.210.0070.01016.63
7.4.200.0070.00016.53
7.4.190.0030.00316.45
7.4.160.0070.01316.58
7.4.150.0090.00917.40
7.4.140.0120.00817.17
7.4.130.0120.00516.50
7.4.120.0100.00616.54
7.4.110.0140.00316.60
7.4.100.0090.00916.53
7.4.90.0050.01116.57
7.4.80.0120.00418.80
7.4.70.0070.01016.58
7.4.60.0120.00616.59
7.4.50.0040.00416.55
7.4.40.0140.00322.27
7.4.30.0070.01016.61
7.4.00.0040.01215.14
7.3.330.0030.00313.32
7.3.320.0000.00513.27
7.3.310.0030.00316.41
7.3.300.0050.00316.21
7.3.290.0090.00616.43
7.3.280.0080.00716.36
7.3.270.0120.00917.40
7.3.260.0120.00918.24
7.3.250.0110.00716.37
7.3.240.0100.00716.55
7.3.230.0070.01016.39
7.3.210.0120.00916.27
7.3.200.0100.00719.39
7.3.190.0070.01716.46
7.3.180.0130.00316.45
7.3.170.0100.00616.42
7.3.160.0060.00916.59
7.3.120.0030.01414.79
7.2.330.0070.01016.69
7.2.320.0100.01016.54
7.2.310.0100.00716.33
7.2.300.0080.00816.46
7.2.290.0150.00316.72
7.2.00.0030.00719.32
7.1.100.0080.00318.44
7.1.70.0040.00817.14
7.1.60.0030.02219.40
7.1.50.0060.01616.86
7.1.00.0000.08022.27
7.0.200.0060.00316.86
7.0.140.0030.07322.19
7.0.60.0100.03319.84
7.0.50.0030.04317.88
7.0.40.0130.03320.24
7.0.30.0270.05320.24
7.0.20.0270.08020.06
7.0.10.0300.07320.10
7.0.00.0030.04320.20
5.6.280.0030.06720.91
5.6.210.0100.08020.50
5.6.200.0100.06318.29
5.6.190.0070.04020.47
5.6.180.0270.04320.34
5.6.170.0170.04320.45
5.6.160.0130.07720.57
5.6.150.0000.05718.12
5.6.140.0130.06718.28
5.6.130.0030.04018.21
5.6.120.0070.04321.10
5.6.110.0100.08720.98
5.6.100.0070.08721.00
5.6.90.0100.08020.96
5.6.80.0070.08020.34
5.6.70.4000.03320.35
5.5.350.4230.04320.44
5.5.340.0100.07718.00
5.5.330.0100.08020.27
5.5.320.0270.06320.41
5.5.310.0330.06720.38
5.5.300.0070.08017.95
5.5.290.0100.07718.07
5.5.280.0130.04320.94
5.5.270.0170.07720.87
5.5.260.0070.08020.84
5.5.250.0100.08320.62
5.5.240.0170.07020.19
5.4.450.0170.03719.32
5.4.440.0070.08019.57
5.4.430.0070.08019.40
5.4.420.0000.08019.54
5.4.410.0000.05019.14
5.4.400.0030.07719.17
5.4.390.0000.04318.86
5.4.380.0000.06019.08
5.4.370.0000.07719.32
5.4.360.0030.06718.99
5.4.350.0000.07719.15
5.4.340.0070.04319.01
5.4.320.0030.04319.09
5.4.310.0000.04319.20
5.4.300.0030.04318.87
5.4.290.0000.08019.22
5.4.280.0100.07019.09
5.4.270.0070.04019.06
5.4.260.0070.07719.08
5.4.250.0070.07019.23
5.4.240.0000.04719.14
5.4.230.0100.04019.23
5.4.220.0030.06018.98
5.4.210.0030.04318.97
5.4.200.0030.07319.31
5.4.190.0000.04718.97
5.4.180.0070.04019.30
5.4.170.0000.04319.12
5.4.160.0070.05719.05
5.4.150.0070.06719.13
5.4.140.0030.07316.35
5.4.130.0000.07316.51
5.4.120.0070.04316.38
5.4.110.0100.06316.46
5.4.100.0000.04016.55
5.4.90.0070.03716.45
5.4.80.0070.03716.41
5.4.70.0030.06016.34
5.4.60.0030.05716.56
5.4.50.0000.07316.34
5.4.40.0070.05716.42
5.4.30.0070.06716.37
5.4.20.0130.06016.42
5.4.10.0030.05016.53
5.4.00.0000.07315.73
5.3.290.0030.08014.56
5.3.280.0030.08014.50
5.3.270.0000.05014.57
5.3.260.0070.07714.68
5.3.250.0000.08014.76
5.3.240.0100.04014.68
5.3.230.0030.05014.61
5.3.220.0000.08014.68
5.3.210.0000.05014.48
5.3.200.0070.04714.58
5.3.190.0070.03314.72
5.3.180.0000.04014.56
5.3.170.0030.07314.71
5.3.160.0070.07014.47
5.3.150.0030.06714.57
5.3.140.0070.07314.57
5.3.130.0070.06714.63
5.3.120.0000.08314.47
5.3.110.0030.04314.55
5.3.100.0030.07713.94
5.3.90.0100.06714.07
5.3.80.0030.06713.92
5.3.70.0000.04313.94
5.3.60.0030.07013.93
5.3.50.0030.07714.16
5.3.40.0030.05014.16
5.3.30.0100.05713.82
5.3.20.0000.07313.61
5.3.10.0000.06713.73
5.3.00.0030.04713.54
5.2.170.0000.05712.12
5.2.160.0030.05012.12
5.2.150.0030.05012.12
5.2.140.0070.05712.12
5.2.130.0030.06012.12
5.2.120.0030.06012.12
5.2.110.0000.06012.12
5.2.100.0000.05312.12
5.2.90.0030.03712.12
5.2.80.0000.04012.12
5.2.70.0030.04312.12
5.2.60.0030.02712.12
5.2.50.0000.03012.12
5.2.40.0000.03312.12
5.2.30.0000.03012.12
5.2.20.0030.02712.12
5.2.10.0000.03312.12
5.2.00.0000.02712.12
5.1.60.0030.02012.12
5.1.50.0000.02312.12
5.1.40.0000.03012.12
5.1.30.0030.02712.12
5.1.20.0000.03012.12
5.1.10.0030.02312.12
5.1.00.0030.02312.12
5.0.50.0000.02312.12
5.0.40.0000.02012.12
5.0.30.0000.03012.12
5.0.20.0000.01712.12
5.0.10.0000.02012.12
5.0.00.0000.03012.12
4.4.90.0070.01012.12
4.4.80.0000.01712.12
4.4.70.0030.01312.12
4.4.60.0000.02312.12
4.4.50.0000.01712.12
4.4.40.0000.02312.12
4.4.30.0000.01312.12
4.4.20.0000.01312.12
4.4.10.0000.01712.12
4.4.00.0000.02312.12
4.3.110.0000.02012.12
4.3.100.0030.01312.12
4.3.90.0000.01312.12
4.3.80.0000.02312.12
4.3.70.0070.02012.12
4.3.60.0100.00712.12
4.3.50.0000.01712.12
4.3.40.0000.02312.12
4.3.30.0000.03312.12
4.3.20.0030.02012.12
4.3.10.0030.01312.12
4.3.00.0000.01712.12

preferences:
36.24 ms | 401 KiB | 5 Q