3v4l.org

run code in 300+ PHP versions simultaneously
<?php function string_reverse($str) { $temp = ''; for( $i = mb_strlen($str); $i >=0 ; $i--) { $temp.= $str{$i}; } return $temp; } echo string_reverse('Output') ;

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)
8.3.70.0130.00916.63
8.3.60.0090.00616.75
8.3.50.0230.00821.02
8.3.40.0070.00718.67
8.3.30.0070.00718.50
8.3.20.0040.00421.86
8.3.10.0030.00620.27
8.3.00.0030.00521.73
8.2.180.0140.00716.50
8.2.170.0070.01022.96
8.2.160.0110.00819.09
8.2.150.0000.00724.18
8.2.140.0040.00424.66
8.2.130.0080.00020.84
8.2.120.0050.00226.35
8.2.110.0070.00422.29
8.2.100.0000.01217.78
8.2.90.0000.00817.63
8.2.80.0060.00318.53
8.2.70.0000.00817.68
8.2.60.0000.00717.38
8.2.50.0040.00417.55
8.2.40.0040.00420.95
8.2.30.0000.00719.07
8.2.20.0050.00317.78
8.2.10.0070.00017.92
8.2.00.0070.00417.52
8.1.280.0120.00325.92
8.1.270.0050.00323.96
8.1.260.0040.00428.09
8.1.250.0070.00028.09
8.1.240.0030.00723.76
8.1.230.0000.01121.04
8.1.220.0050.00317.74
8.1.210.0050.00318.77
8.1.200.0030.00617.23
8.1.190.0060.00317.00
8.1.180.0040.00418.10
8.1.170.0000.00718.95
8.1.160.0030.00322.03
8.1.150.0020.00518.79
8.1.140.0030.00519.36
8.1.130.0030.00317.56
8.1.120.0000.00717.33
8.1.110.0030.00517.30
8.1.100.0000.00717.22
8.1.90.0040.00417.23
8.1.80.0030.00317.26
8.1.70.0080.00017.35
8.1.60.0030.00617.42
8.1.50.0030.00517.30
8.1.40.0000.00717.36
8.1.30.0030.00517.37
8.1.20.0060.00317.50
8.1.10.0020.00517.43
8.1.00.0040.00417.20
8.0.300.0070.00018.77
8.0.290.0000.00816.63
8.0.280.0050.00218.31
8.0.270.0000.00717.18
8.0.260.0030.00317.29
8.0.250.0030.00316.77
8.0.240.0070.00016.71
8.0.230.0060.00316.90
8.0.220.0000.00716.84
8.0.210.0070.00016.80
8.0.200.0000.00716.77
8.0.190.0060.00316.77
8.0.180.0040.00416.86
8.0.170.0000.00816.68
8.0.160.0040.00416.86
8.0.150.0070.00016.83
8.0.140.0000.00716.67
8.0.130.0060.00013.28
8.0.120.0060.00316.77
8.0.110.0050.00516.91
8.0.100.0030.00416.85
8.0.90.0070.00016.84
8.0.80.0100.01316.77
8.0.70.0030.00616.77
8.0.60.0050.00316.84
8.0.50.0070.00016.88
8.0.30.0090.00916.97
8.0.20.0100.00917.40
8.0.10.0000.00716.80
8.0.00.0090.00916.57
7.4.330.0000.00515.21
7.4.320.0060.00016.48
7.4.300.0000.00616.51
7.4.290.0090.00016.54
7.4.280.0030.00316.38
7.4.270.0030.00316.55
7.4.260.0030.00316.38
7.4.250.0000.00716.45
7.4.240.0000.00816.53
7.4.230.0050.00316.40
7.4.220.0130.00616.59
7.4.210.0090.00516.54
7.4.200.0070.00016.39
7.4.160.0100.00616.57
7.4.150.0070.01117.40
7.4.140.0140.00317.86
7.4.130.0070.01016.52
7.4.120.0090.01016.62
7.4.110.0150.00616.47
7.4.100.0080.01316.64
7.4.90.0070.01016.60
7.4.80.0030.01419.39
7.4.70.0060.00916.60
7.4.60.0090.00916.46
7.4.50.0040.01116.29
7.4.40.0110.00816.71
7.4.30.0160.00016.48
7.4.00.0140.00314.88
7.3.330.0000.00613.36
7.3.320.0020.00313.28
7.3.310.0000.00716.35
7.3.300.0030.00316.36
7.3.290.0080.00516.31
7.3.280.0100.00616.35
7.3.270.0160.00017.40
7.3.260.0100.01016.57
7.3.250.0100.00916.50
7.3.240.0100.00716.54
7.3.230.0130.00616.56
7.3.210.0070.01016.47
7.3.200.0080.01216.66
7.3.190.0090.00616.46
7.3.180.0130.00516.43
7.3.170.0100.01116.41
7.3.160.0160.00616.39
7.3.10.0060.00616.70
7.3.00.0100.00316.66
7.2.330.0060.01316.77
7.2.320.0160.00616.70
7.2.310.0080.00816.66
7.2.300.0100.00716.73
7.2.290.0080.00816.77
7.2.130.0100.00316.95
7.2.120.0000.01217.16
7.2.110.0090.00616.94
7.2.100.0030.01216.93
7.2.90.0070.00316.84
7.2.80.0000.01317.20
7.2.70.0030.00916.79
7.2.60.0050.00616.97
7.2.50.0000.01016.90
7.2.40.0060.00917.22
7.2.30.0090.00317.10
7.2.20.0060.00316.96
7.2.10.0070.00716.99
7.2.00.0060.00717.91
7.1.250.0030.00915.80
7.1.200.0040.00415.82
7.1.100.0000.01118.09
7.1.70.0000.00817.20
7.1.60.0040.00817.38
7.1.50.0040.00717.10
7.1.00.0070.07322.44
7.0.200.0330.00714.50
7.0.110.0330.07020.26
7.0.100.0270.06320.27
7.0.90.0230.06020.38
7.0.80.0200.06020.25
7.0.70.0370.04320.21
7.0.60.0230.06020.21
7.0.50.0330.04720.26
7.0.40.0270.06020.26
7.0.30.0400.04320.17
7.0.20.0470.06720.21
7.0.10.0330.06320.25
7.0.00.0330.06320.34
5.6.260.0130.08321.05
5.6.250.0200.04721.08
5.6.240.0130.05320.88
5.6.230.0170.05021.10
5.6.220.0000.06320.92
5.6.210.0030.06020.86
5.6.200.0170.05320.81
5.6.190.0100.05721.04
5.6.180.0130.08020.84
5.6.170.0170.06721.06
5.6.160.0030.07020.97
5.6.150.0100.06721.09
5.6.140.0130.07720.94
5.6.130.0200.06320.74
5.6.120.0130.06021.00
5.6.110.0130.05720.79
5.6.100.0200.05320.73
5.6.90.0100.05721.07
5.6.80.0170.04720.39
5.6.70.0130.05320.14
5.6.60.0200.05020.46
5.6.50.0100.07720.42
5.6.40.0030.06320.40
5.6.30.0070.06720.45
5.6.20.0070.06020.40
5.6.10.0130.05020.29
5.6.00.0170.04720.39

preferences:
58.35 ms | 401 KiB | 5 Q