3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s1 = 'toto'; $s2 = 'tata'; var_dump($s1 + $s2); var_dump($s1.$s2); var_dump("{$s1}{$s2}"); var_dump(implode("", array($s1, $s2)));

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)
8.3.60.0140.00018.57
8.3.50.0110.00721.04
8.3.40.0040.01118.63
8.3.30.0000.01418.89
8.3.20.0100.00720.21
8.3.10.0000.00823.53
8.3.00.0040.00419.68
8.2.180.0070.01116.62
8.2.170.0080.00622.96
8.2.160.0070.00720.35
8.2.150.0080.00024.18
8.2.140.0100.01024.66
8.2.130.0050.00326.16
8.2.120.0080.00017.50
8.2.110.0000.00919.29
8.2.100.0120.00017.50
8.2.90.0030.00719.27
8.2.80.0030.00617.97
8.2.70.0000.00817.48
8.2.60.0000.00917.93
8.2.50.0000.00918.07
8.2.40.0060.00619.20
8.2.30.0080.00417.95
8.2.20.0040.00417.76
8.2.10.0060.00317.96
8.2.00.0070.00017.93
8.1.280.0110.00425.92
8.1.270.0090.00020.33
8.1.260.0070.00026.35
8.1.250.0070.00028.09
8.1.240.0030.00619.01
8.1.230.0120.00017.42
8.1.220.0040.00417.74
8.1.210.0000.00818.77
8.1.200.0030.00617.13
8.1.190.0080.00317.13
8.1.180.0000.00718.10
8.1.170.0040.00418.28
8.1.160.0040.00421.95
8.1.150.0040.00418.82
8.1.140.0000.00817.39
8.1.130.0030.00317.64
8.1.120.0050.00317.46
8.1.110.0040.00417.23
8.1.100.0030.00317.26
8.1.90.0030.00517.47
8.1.80.0000.00717.35
8.1.70.0000.00717.29
8.1.60.0050.00317.52
8.1.50.0040.00417.57
8.1.40.0040.00417.50
8.1.30.0080.00417.47
8.1.20.0000.00717.54
8.1.10.0040.00417.66
8.1.00.0000.00717.43
8.0.300.0050.00218.77
8.0.290.0000.00716.63
8.0.280.0030.00318.38
8.0.270.0030.00317.16
8.0.260.0030.00317.18
8.0.250.0040.00416.84
8.0.240.0040.00416.88
8.0.230.0000.00916.86
8.0.220.0000.00616.77
8.0.210.0000.00716.82
8.0.200.0040.00416.83
8.0.190.0020.00516.88
8.0.180.0000.00716.95
8.0.170.0000.00816.88
8.0.160.0000.00816.81
8.0.150.0030.00416.82
8.0.140.0040.00416.86
8.0.130.0090.00013.31
8.0.120.0040.00416.88
8.0.110.0040.00416.88
8.0.100.0040.00316.77
8.0.90.0000.00716.90
8.0.80.0070.00716.95
8.0.70.0070.00016.70
8.0.60.0050.00316.68
8.0.50.0000.00716.78
8.0.30.0070.01116.83
8.0.20.0120.01017.40
8.0.10.0030.00516.96
8.0.00.0090.00916.70
7.4.330.0000.00515.08
7.4.320.0000.00616.55
7.4.300.0030.00316.48
7.4.290.0030.00316.57
7.4.280.0040.00416.55
7.4.270.0000.00816.52
7.4.260.0000.00716.62
7.4.250.0040.00416.39
7.4.240.0020.00516.56
7.4.230.0030.00316.60
7.4.220.0140.01116.60
7.4.210.0000.01416.56
7.4.200.0050.00216.55
7.4.160.0040.01516.54
7.4.150.0100.00717.40
7.4.140.0030.01717.86
7.4.130.0120.01016.53
7.4.120.0160.00516.59
7.4.110.0030.01316.62
7.4.100.0090.01516.66
7.4.90.0170.00016.46
7.4.80.0090.00619.39
7.4.70.0060.01216.68
7.4.60.0090.00916.47
7.4.50.0030.00616.48
7.4.40.0000.02016.47
7.4.30.0070.01316.54
7.4.00.0130.00315.03
7.3.330.0020.00213.19
7.3.320.0030.00312.96
7.3.310.0030.00316.40
7.3.300.0030.00316.23
7.3.290.0060.01116.30
7.3.280.0100.01216.30
7.3.270.0100.00717.40
7.3.260.0160.00316.25
7.3.250.0120.00616.40
7.3.240.0120.00816.28
7.3.230.0070.01116.39
7.3.210.0120.00916.50
7.3.200.0060.00916.41
7.3.190.0120.00416.50
7.3.180.0000.01416.23
7.3.170.0090.00616.32
7.3.160.0120.00916.30
7.3.10.0040.01016.60
7.3.00.0110.00316.59
7.2.330.0120.00816.43
7.2.320.0140.00916.66
7.2.310.0150.00916.36
7.2.300.0080.00816.45
7.2.290.0130.01316.71
7.2.130.0120.00316.81
7.2.120.0030.01316.70
7.2.110.0090.00616.71
7.2.100.0100.00016.71
7.2.90.0140.00016.50
7.2.80.0080.00416.71
7.2.70.0040.00816.83
7.2.60.0060.00916.83
7.2.50.0040.00416.69
7.2.40.0030.01016.75
7.2.30.0110.00416.56
7.2.20.0000.01317.00
7.2.10.0070.00716.86
7.2.00.0020.01117.99
7.1.250.0080.00315.79
7.1.200.0070.00715.77
7.1.100.0000.01118.22
7.1.70.0040.00816.80
7.1.60.0100.01319.17
7.1.50.0100.01016.72
7.1.00.0030.07322.47
7.0.200.0030.00616.85
7.0.60.0130.07719.91
7.0.50.0030.08317.85
7.0.40.0070.06319.98
7.0.30.0170.04720.00
7.0.20.0130.04320.00
7.0.10.0170.08020.00
7.0.00.0030.06319.99
5.6.280.0030.04020.92
5.6.210.0130.07320.66
5.6.200.0070.07718.11
5.6.190.0000.05020.56
5.6.180.3400.04020.45
5.6.170.0330.06020.52
5.6.160.0070.08720.49
5.6.150.0070.04718.22
5.6.140.0100.03318.17
5.6.130.0100.06318.22
5.6.120.0030.04021.03
5.6.110.0170.05321.09
5.6.100.0030.04320.98
5.6.90.0070.08320.97
5.6.80.0270.06320.52
5.5.350.0100.07320.42
5.5.340.0130.07317.98
5.5.330.0030.04020.46
5.5.320.0270.08020.13
5.5.310.0370.07020.29
5.5.300.0030.07317.94
5.5.290.0100.03318.01
5.5.280.0000.06020.79
5.5.270.0030.05020.75
5.5.260.0000.04320.88
5.5.250.0100.07720.62
5.5.240.4100.04320.27
5.4.450.0870.07719.57
5.4.440.0830.04719.52
5.4.430.0770.06019.51
5.4.420.0730.05719.53
5.4.410.0800.06318.98
5.4.400.0730.05318.84
5.4.390.0830.04018.85
5.4.380.0630.05719.08
5.4.370.0730.05018.96
5.4.360.0800.04719.20
5.4.350.0700.05319.19
5.4.340.0670.06018.86
5.4.320.0630.06019.15
5.4.310.0730.04719.20
5.4.300.0800.06019.25
5.4.290.1000.05719.25
5.4.280.0730.06018.99
5.4.270.0900.05019.25
5.4.260.1000.04319.23
5.4.250.1030.04018.76
5.4.240.0870.04719.05
5.4.230.0870.03719.08
5.4.220.0700.05718.79
5.4.210.0730.05719.21
5.4.200.0870.05019.20
5.4.190.0900.04718.93
5.4.180.0900.04718.86
5.4.170.0930.04319.20
5.4.160.0870.05018.77
5.4.150.0770.06319.03
5.4.140.0870.05716.26
5.4.130.0830.05016.51
5.4.120.0870.04716.48
5.4.110.0800.06016.09
5.4.100.0830.05316.47
5.4.90.0970.04016.30
5.4.80.0870.04716.41
5.4.70.0230.04716.32
5.4.60.0200.03716.19
5.4.50.0030.05716.16
5.4.40.0000.06016.36
5.4.30.0000.03316.18
5.4.20.0200.04716.20

preferences:
68.06 ms | 401 KiB | 5 Q