3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'foo'; echo PHP_EOL, 'unset cast', PHP_EOL; var_dump((unset) $a); var_dump($a); echo PHP_EOL, 'unset call', PHP_EOL; unset($a); var_dump($a);

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)
8.3.60.0140.00016.48
8.3.50.0100.01019.68
8.3.40.0060.01318.50
8.3.30.0120.00318.63
8.3.20.0070.00018.84
8.3.10.0070.00021.60
8.3.00.0040.00420.94
8.2.180.0070.00716.38
8.2.170.0110.00322.96
8.2.160.0070.00720.58
8.2.150.0050.00324.18
8.2.140.0050.00324.66
8.2.130.0050.00321.00
8.2.120.0000.00726.35
8.2.110.0030.00622.22
8.2.100.0070.00717.75
8.2.90.0060.00317.75
8.2.80.0040.00417.97
8.2.70.0000.00817.74
8.2.60.0040.00417.80
8.2.50.0000.00818.10
8.2.40.0060.00320.35
8.2.30.0000.00719.06
8.2.20.0050.00217.91
8.2.10.0000.00717.88
8.2.00.0040.00417.40
8.1.280.0070.01025.92
8.1.270.0070.00021.97
8.1.260.0080.00028.09
8.1.250.0040.00428.09
8.1.240.0090.00021.96
8.1.230.0040.00717.77
8.1.220.0000.00717.74
8.1.210.0040.00418.77
8.1.200.0030.00617.23
8.1.190.0050.00517.23
8.1.180.0040.00418.10
8.1.170.0030.00618.53
8.1.160.0000.00720.47
8.1.150.0040.00420.12
8.1.140.0000.01119.46
8.1.130.0030.00317.61
8.1.120.0060.00317.24
8.1.110.0000.00717.31
8.1.100.0040.00417.35
8.1.90.0030.00617.33
8.1.80.0000.00717.33
8.1.70.0030.00317.32
8.1.60.0000.00717.46
8.1.50.0000.00917.30
8.1.40.0040.00417.27
8.1.30.0000.00817.38
8.1.20.0030.00517.52
8.1.10.0020.00517.27
8.1.00.0060.00317.32
8.0.300.0040.00418.77
8.0.290.0100.00016.58
8.0.280.0070.00018.23
8.0.270.0070.00016.97
8.0.260.0030.00317.12
8.0.250.0030.00316.84
8.0.240.0030.00316.79
8.0.230.0040.00416.87
8.0.220.0000.00716.87
8.0.210.0030.00316.83
8.0.200.0070.00316.88
8.0.190.0030.00716.75
8.0.180.0040.00416.90
8.0.170.0040.00416.82
8.0.160.0000.00816.87
8.0.150.0070.00016.79
8.0.140.0070.00016.65
8.0.130.0030.00313.27
8.0.120.0000.00916.80
8.0.110.0000.00716.80
8.0.100.0000.00716.63
8.0.90.0070.00016.80
8.0.80.0070.01016.80
8.0.70.0000.00816.67
8.0.60.0050.00316.77
8.0.50.0000.00716.68
8.0.30.0170.00316.88
8.0.20.0120.00817.40
8.0.10.0040.00416.75
8.0.00.0160.00316.73
7.4.330.0000.00515.55
7.4.320.0000.00716.50
7.4.300.0040.00416.56
7.4.290.0030.00316.56
7.4.280.0030.00616.48
7.4.270.0030.00316.40
7.4.260.0000.00716.51
7.4.250.0000.00816.37
7.4.240.0000.00716.60
7.4.230.0000.00716.61
7.4.220.0140.00316.53
7.4.210.0030.01216.59
7.4.200.0080.00016.37
7.4.160.0130.00316.48
7.4.150.0060.01317.40
7.4.140.0110.00817.86
7.4.130.0070.01016.54
7.4.120.0090.01016.50
7.4.110.0120.02116.46
7.4.100.0060.01216.68
7.4.90.0040.01416.72
7.4.80.0060.01519.39
7.4.70.0090.00716.39
7.4.60.0040.01116.46
7.4.50.0070.00716.20
7.4.40.0150.00316.34
7.4.30.0060.01316.69
7.4.00.0100.00614.96
7.3.330.0000.00513.05
7.3.320.0000.00513.24
7.3.310.0040.00416.11
7.3.300.0030.00316.08
7.3.290.0000.00616.09
7.3.280.0110.00716.26
7.3.270.0060.01517.40
7.3.260.0100.00716.38
7.3.250.0110.00716.41
7.3.240.0100.01016.34
7.3.230.0100.00716.39
7.3.210.0170.00016.43
7.3.200.0060.01216.40
7.3.190.0080.00816.49
7.3.180.0090.00616.36
7.3.170.0160.00016.43
7.3.160.0090.00616.27
7.3.120.0090.00914.82
7.3.110.0070.01114.87
7.3.100.0100.00314.81
7.3.90.0130.00314.90
7.3.80.0030.00914.54
7.3.70.0000.01514.85
7.3.60.0000.00814.85
7.3.50.0090.00614.71
7.3.40.0040.01114.87
7.3.30.0060.00914.83
7.3.20.0070.00416.39
7.3.10.0070.00716.55
7.3.00.0040.01116.65
7.2.330.0100.01016.46
7.2.320.0100.01116.43
7.2.310.0060.01016.35
7.2.300.0090.01316.43
7.2.290.0070.01016.41
7.2.250.0060.01215.03
7.2.240.0110.00715.04
7.2.230.0070.01014.58
7.2.220.0060.01014.93
7.2.210.0080.00414.82
7.2.200.0100.00714.74
7.2.190.0040.01114.73
7.2.180.0070.01115.08
7.2.170.0100.00314.92
7.2.60.0090.00616.69
7.2.00.0090.00919.27
7.1.330.0000.01515.69
7.1.320.0030.01315.94
7.1.310.0040.01115.79
7.1.300.0030.01015.68
7.1.290.0000.01415.69
7.1.280.0060.00615.74
7.1.270.0000.01115.80
7.1.260.0100.00315.83
7.1.200.0050.00315.90
7.1.100.0090.00318.03
7.1.70.0030.00517.22
7.1.60.0030.00717.21
7.1.50.0120.00617.11
7.1.00.0100.07022.45
7.0.200.0020.00516.88
7.0.130.0070.06022.09
7.0.120.0070.06022.13
7.0.110.0100.05322.15
7.0.100.0130.05022.03
7.0.90.0170.06722.05
7.0.80.0030.09322.05
7.0.70.0100.08322.05
7.0.60.0100.05322.10
7.0.50.0030.06322.16
7.0.40.0130.07022.20
7.0.30.0070.05322.20
7.0.20.0070.05322.02
7.0.10.0100.05322.03
7.0.00.0100.05322.02
5.6.280.0030.06020.86
5.6.270.0000.06721.04
5.6.260.0100.05020.84
5.6.250.0000.06021.02
5.6.240.0100.05721.09
5.6.230.0170.05320.74
5.6.220.0100.07720.77
5.6.210.0030.06020.95
5.6.200.0200.06720.79
5.6.190.0030.06020.96
5.6.180.0070.05320.84
5.6.170.0030.05721.02
5.6.160.0030.08020.99
5.6.150.0100.07720.98
5.6.140.0070.07321.02
5.6.130.0170.06020.84
5.6.120.0070.07320.96
5.6.110.0170.04720.97
5.6.100.0100.07320.81
5.6.90.0170.06720.72
5.6.80.0100.06020.46
5.6.70.0130.07320.41
5.6.60.0130.07320.38
5.6.50.0130.07320.23
5.6.40.0100.05720.37
5.6.30.0100.06320.27
5.6.20.0070.08320.35
5.6.10.0200.04720.27
5.6.00.0100.06720.16

preferences:
52.42 ms | 401 KiB | 5 Q