3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = ""; $str[] = "b"; var_dump($str); $str = "a"; $str[0] = "b"; var_dump($str); $str = "a"; $str[1] = "b"; var_dump($str);

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)
8.3.60.0110.00416.47
8.3.50.0140.00521.28
8.3.40.0070.00718.83
8.3.30.0070.00718.93
8.3.20.0000.00820.16
8.3.10.0060.00323.56
8.3.00.0080.00023.66
8.2.180.0070.00716.75
8.2.170.0030.01022.96
8.2.160.0100.00320.39
8.2.150.0000.00824.18
8.2.140.0000.00824.66
8.2.130.0000.00719.54
8.2.120.0040.00426.35
8.2.110.0000.00922.25
8.2.100.0040.00717.92
8.2.90.0050.00219.09
8.2.80.0080.00017.97
8.2.70.0090.00017.50
8.2.60.0080.00017.92
8.2.50.0060.00318.07
8.2.40.0060.00322.16
8.2.30.0040.00419.50
8.2.20.0070.00017.66
8.2.10.0070.00017.93
8.2.00.0040.00418.00
8.1.280.0030.01025.92
8.1.270.0050.00323.83
8.1.260.0070.00428.09
8.1.250.0000.00828.09
8.1.240.0070.00323.75
8.1.230.0090.00319.21
8.1.220.0050.00317.74
8.1.210.0000.00818.77
8.1.200.0060.00317.35
8.1.190.0000.00817.21
8.1.180.0040.00418.10
8.1.170.0040.00418.61
8.1.160.0040.00420.61
8.1.150.0080.00018.82
8.1.140.0040.00419.56
8.1.130.0030.00317.34
8.1.120.0000.00717.32
8.1.110.0050.00317.42
8.1.100.0000.00817.43
8.1.90.0040.00417.45
8.1.80.0050.00217.29
8.1.70.0070.00017.39
8.1.60.0000.00717.51
8.1.50.0060.00317.53
8.1.40.0000.00817.52
8.1.30.0040.00417.60
8.1.20.0030.00617.60
8.1.10.0030.00617.57
8.1.00.0090.00017.40
8.0.300.0050.00218.77
8.0.290.0040.00416.75
8.0.280.0070.00018.41
8.0.270.0070.00017.06
8.0.260.0060.00016.86
8.0.250.0070.00016.96
8.0.240.0030.00316.85
8.0.230.0070.00016.93
8.0.220.0040.00416.87
8.0.210.0070.00016.96
8.0.200.0030.00316.84
8.0.190.0060.00316.96
8.0.180.0000.00716.82
8.0.170.0060.00316.93
8.0.160.0050.00316.96
8.0.150.0000.00716.73
8.0.140.0080.00016.79
8.0.130.0000.00513.38
8.0.120.0080.00016.83
8.0.110.0040.00416.80
8.0.100.0000.00716.92
8.0.90.0040.00416.71
8.0.80.0110.00416.84
8.0.70.0040.00416.78
8.0.60.0040.00416.83
8.0.50.0000.00716.91
8.0.30.0120.00716.92
8.0.20.0080.01117.40
8.0.10.0050.00216.90
8.0.00.0170.00416.74
7.4.330.0000.00616.83
7.4.320.0060.00016.51
7.4.300.0070.00016.64
7.4.290.0030.00316.59
7.4.280.0090.00016.39
7.4.270.0040.00416.55
7.4.260.0000.00716.60
7.4.250.0070.00016.53
7.4.240.0070.00016.49
7.4.230.0000.00716.62
7.4.220.0080.00916.63
7.4.210.0050.00916.63
7.4.200.0040.00416.50
7.4.160.0100.00516.59
7.4.150.0140.00417.40
7.4.140.0070.01017.86
7.4.130.0120.00616.55
7.4.120.0090.00916.58
7.4.110.0080.00816.77
7.4.100.0130.00316.48
7.4.90.0100.00716.59
7.4.80.0120.00619.39
7.4.70.0160.00616.38
7.4.60.0100.00716.48
7.4.50.0060.00616.40
7.4.40.0030.01316.50
7.4.30.0140.00416.49
7.4.00.0080.00814.72
7.3.330.0000.00513.10
7.3.320.0000.00513.02
7.3.310.0050.00316.27
7.3.300.0070.00016.25
7.3.290.0040.00416.26
7.3.280.0110.00716.27
7.3.270.0090.00917.40
7.3.260.0160.01016.56
7.3.240.0100.00916.36
7.3.230.0100.00816.39
7.3.210.0100.01016.38
7.3.200.0090.01219.39
7.3.190.0090.01016.26
7.3.180.0100.00616.30
7.3.170.0090.00616.29
7.3.160.0060.01216.25
7.2.330.0040.01316.61
7.2.320.0040.01816.55
7.2.310.0030.01316.59
7.2.300.0060.01216.32
7.2.290.0090.00916.58
7.2.60.0070.00716.79
7.2.00.0030.00919.42
7.1.200.0030.00715.48
7.1.100.0070.01018.13
7.1.70.0000.01017.04
7.1.60.0130.01019.30
7.1.50.0070.01416.99
7.1.00.0070.07022.28
7.0.200.0060.00316.95
7.0.60.0200.06721.69
7.0.50.0030.04317.75
7.0.40.0030.05020.20
7.0.30.0370.05019.99
7.0.20.0330.07320.17
7.0.10.0100.08320.16
7.0.00.0000.06020.16
5.6.280.0000.07321.09
5.6.210.0070.06020.62
5.6.200.0070.04718.12
5.6.190.0100.09020.39
5.6.180.0400.06320.41
5.6.170.0230.08320.38
5.6.160.0100.08720.44
5.6.150.0030.04018.12
5.6.140.0100.07318.14
5.6.130.0070.06018.18
5.6.120.0100.08320.98
5.6.110.0100.08321.10
5.6.100.0200.06020.98
5.6.90.0100.04020.87
5.6.80.0230.06720.50
5.5.350.0100.04320.41
5.5.340.0100.08017.92
5.5.330.0100.07720.21
5.5.320.0270.03720.34
5.5.310.0330.06320.32
5.5.300.0030.06717.98
5.5.290.0070.03718.00
5.5.280.0070.05720.72
5.5.270.0370.05720.86
5.5.260.0030.04320.67
5.5.250.0070.07320.57
5.5.240.0170.07320.03

preferences:
57.12 ms | 401 KiB | 5 Q