3v4l.org

run code in 300+ PHP versions simultaneously
<?php function by_return($dummy=null) { $dummy = str_repeat("1",10 * 1024 * 1024); return $dummy; } function by_reference(&$dummy) { $dummy = null; $dummy = str_repeat("1",10 * 1024 * 1024); } echo memory_get_usage()."/".memory_get_peak_usage()."\n"; //1 always returns: 105493696/105496656 $nagid = by_return(); echo memory_get_usage()."/".memory_get_peak_usage()."\n"; unset($nagid); //2 always returns: 105493696/210354184 even if we comment 1st part by_reference($dummy); echo memory_get_usage()."/".memory_get_peak_usage()."\n"; unset($dummy);

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)
7.2.00.0120.00329.14
7.1.70.0030.00926.86
7.1.60.0060.00927.47
7.1.50.0060.02226.99
7.1.00.0070.07732.26
7.0.200.0330.01026.75
7.0.140.0070.06732.18
7.0.70.0070.08331.69
7.0.60.0170.08331.75
7.0.50.0030.08732.15
7.0.40.0100.09730.18
7.0.30.0070.08730.06
7.0.20.0030.07730.13
7.0.10.0100.06730.03
7.0.00.0100.08029.94
5.6.280.0100.07740.96
5.6.220.0030.08340.52
5.6.210.0100.08040.69
5.6.200.0100.08740.85
5.6.190.0230.08041.05
5.6.180.0170.08341.34
5.6.170.0170.08341.07
5.6.160.0100.07740.86
5.6.150.0030.10040.86
5.6.140.0070.09041.43
5.6.130.0100.05340.87
5.6.120.0070.05040.89
5.6.110.0100.06741.31
5.6.100.0130.04040.89
5.6.90.0000.07040.93
5.6.80.0030.09340.17
5.6.70.0100.04340.42
5.6.60.0070.06040.50
5.6.50.0070.07740.18
5.6.40.0030.09040.28
5.6.30.0170.07740.38
5.6.20.0130.08040.23
5.6.10.0130.07040.18
5.6.00.0130.06040.43
5.5.360.0100.06340.34
5.5.350.0170.08040.28
5.5.340.0130.08340.62
5.5.330.0130.08340.73
5.5.320.0100.05740.76
5.5.310.0070.06740.70
5.5.300.0130.05340.75
5.5.290.0200.07740.74
5.5.280.0070.06740.56
5.5.270.0100.08740.63
5.5.260.0030.06740.91
5.5.250.0070.06741.04
5.5.240.0030.06740.15
5.5.230.0070.05040.04
5.5.220.0100.08739.97
5.5.210.0130.07739.94
5.5.200.0130.06040.13
5.5.190.0070.06040.29
5.5.180.0100.08339.95
5.5.160.0300.07340.11
5.5.150.0000.05740.04
5.5.140.0200.04740.05
5.5.130.0000.08740.01
5.5.120.0170.07740.30
5.5.110.0070.08740.06
5.5.100.0100.05339.91
5.5.90.0100.05039.81
5.5.80.0200.06739.96
5.5.70.0070.08340.30
5.5.60.0130.07739.86
5.5.50.0030.09039.79
5.5.40.0130.08039.89
5.5.30.0130.07739.76
5.5.20.0100.08039.79
5.5.10.0100.05039.80
5.5.00.0170.08039.94
5.4.450.0030.06039.58
5.4.440.0070.08339.70
5.4.430.0000.09338.93
5.4.420.0030.06739.11
5.4.410.0070.07039.02
5.4.400.0230.07038.80
5.4.390.0030.04339.00
5.4.380.0030.08038.86
5.4.370.0030.08338.88
5.4.360.0070.08339.20
5.4.350.0170.07338.82
5.4.340.0070.07739.25
5.4.320.0170.07338.78
5.4.310.0170.05039.20
5.4.300.0070.08338.94
5.4.290.0100.08739.22
5.4.280.0100.06338.79
5.4.270.0100.07338.76
5.4.260.0130.07338.72
5.4.250.0100.06039.20
5.4.240.0100.08038.79
5.4.230.0170.06738.98
5.4.220.0070.08338.77
5.4.210.0100.08038.99
5.4.200.0030.04739.21
5.4.190.0070.04038.70
5.4.180.0070.07339.01
5.4.170.0070.06738.74
5.4.160.0070.07038.86
5.4.150.0100.04738.77
5.4.140.0100.08736.06
5.4.130.0170.05736.10
5.4.120.0100.05336.21
5.4.110.0100.07736.27
5.4.100.0130.03736.31
5.4.90.0100.07036.49
5.4.80.0100.08036.27
5.4.70.0230.06736.20
5.4.60.0200.06736.09
5.4.50.0130.07036.11
5.4.40.0000.08336.28
5.4.30.0030.06336.25
5.4.20.0030.06336.11
5.4.10.0100.07736.32
5.4.00.0030.04335.65
5.3.290.0070.08734.47
5.3.280.0100.08334.53
5.3.270.0130.07734.67
5.3.260.0100.06334.73
5.3.250.0100.07034.24
5.3.240.0070.05334.29
5.3.230.0070.08734.33
5.3.220.0030.06334.18
5.3.210.0130.07734.26
5.3.200.0070.05734.59
5.3.190.0030.06334.25
5.3.180.0070.08334.16
5.3.170.0170.07034.45
5.3.160.0070.07034.35
5.3.150.0130.07034.32
5.3.140.0000.06734.23
5.3.130.0200.07034.39
5.3.120.0100.07034.75
5.3.110.0030.08034.29
5.3.100.0100.07734.04
5.3.90.0130.07033.73
5.3.80.0070.04034.19
5.3.70.0100.06033.69
5.3.60.0130.04333.58
5.3.50.0130.06733.79
5.3.40.0100.04733.55
5.3.30.0130.06733.66
5.3.20.0030.08333.41
5.3.10.0100.08033.40
5.3.00.0130.05733.11
5.2.170.0100.06330.55
5.2.160.0070.06330.85
5.2.150.0100.07030.85
5.2.140.0070.05030.88
5.2.130.0200.07330.73
5.2.120.0130.05730.68
5.2.110.0130.06330.74
5.2.100.0130.06730.69
5.2.90.0070.06730.90
5.2.80.0230.06030.91
5.2.70.0170.04331.03
5.2.60.0200.07030.67
5.2.50.0130.05330.70
5.2.40.0200.05731.05
5.2.30.0230.05030.59
5.2.20.0170.06030.70
5.2.10.0170.05330.57
5.2.00.0030.04710.71
5.1.60.0000.04310.30
5.1.50.0070.05010.30
5.1.40.0070.04010.30
5.1.30.0030.05310.48
5.1.20.0130.04710.43
5.1.10.0030.04310.30
5.1.00.0030.05310.30
5.0.50.0030.02010.30
5.0.40.0000.04310.30
5.0.30.0100.05010.30
5.0.20.0000.04310.30
5.0.10.0000.04010.30
5.0.00.0030.06310.30
4.4.90.0000.04310.30
4.4.80.0030.03310.30
4.4.70.0000.03710.30
4.4.60.0000.03310.30
4.4.50.0030.03310.30
4.4.40.0000.04710.30
4.4.30.0030.03310.30
4.4.20.0070.03010.30
4.4.10.0000.03310.30
4.4.00.0030.03710.30
4.3.110.0000.02010.30
4.3.100.0000.03710.30
4.3.90.0000.03310.30
4.3.80.0070.05010.30
4.3.70.0030.03310.30
4.3.60.0000.03710.30
4.3.50.0030.02010.30
4.3.40.0030.05010.30
4.3.30.0030.03310.30
4.3.20.0000.02010.30
4.3.10.0030.03010.30
4.3.00.0000.03010.30

preferences:
40.11 ms | 400 KiB | 5 Q