3v4l.org

run code in 300+ PHP versions simultaneously
<?php $lost = array("A","B","C","D"); // $list = $lost; # cow-count2 // $list = &$lost; # refcount2 // $list = $lost; unset($lost); # just like just assigned but assigned and unset original. $list = (array) $lost; foreach ( $list as $var ) { printf("%s (%s)\n", item($list), $var); } function item(&$list) { return current($list); } ?>

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)
8.3.60.0140.00316.48
8.3.50.0090.01416.52
8.3.40.0160.00018.54
8.3.30.0060.01218.66
8.3.20.0040.00418.57
8.3.10.0040.00420.41
8.3.00.0150.00317.46
8.2.180.0070.01118.05
8.2.170.0090.00922.96
8.2.160.0140.00020.57
8.2.150.0040.00424.18
8.2.140.0140.00024.66
8.2.130.0000.00826.16
8.2.120.0040.00419.23
8.2.110.0050.00521.00
8.2.100.0040.00817.84
8.2.90.0000.00919.41
8.2.80.0040.00419.25
8.2.70.0060.00317.63
8.2.60.0000.00817.80
8.2.50.0030.00618.07
8.2.40.0040.00418.09
8.2.30.0040.00418.04
8.2.20.0070.00017.63
8.2.10.0000.00717.61
8.2.00.0050.00517.73
8.1.280.0070.01325.92
8.1.270.0040.00424.66
8.1.260.0000.00826.35
8.1.250.0070.00028.09
8.1.240.0060.00323.83
8.1.230.0110.00020.91
8.1.220.0000.00817.74
8.1.210.0030.00618.90
8.1.200.0070.00417.13
8.1.190.0040.00417.27
8.1.180.0000.00818.10
8.1.170.0050.00318.90
8.1.160.0080.00018.92
8.1.150.0110.00018.68
8.1.140.0060.00317.44
8.1.130.0030.00317.82
8.1.120.0080.00017.43
8.1.110.0000.00717.52
8.1.100.0000.00817.34
8.1.90.0020.00517.41
8.1.80.0030.00317.36
8.1.70.0000.00717.47
8.1.60.0020.00517.56
8.1.50.0000.00817.42
8.1.40.0000.00917.47
8.1.30.0020.00517.55
8.1.20.0000.00917.54
8.1.10.0000.00717.52
8.1.00.0000.00817.30
8.0.300.0040.00419.92
8.0.290.0070.00016.75
8.0.280.0030.00318.41
8.0.270.0030.00317.23
8.0.260.0030.00316.68
8.0.250.0000.00716.95
8.0.240.0030.00317.01
8.0.230.0070.00017.00
8.0.220.0070.00016.87
8.0.210.0070.00016.94
8.0.200.0000.00616.83
8.0.190.0080.00016.97
8.0.180.0000.00716.90
8.0.170.0000.00816.86
8.0.160.0040.00416.91
8.0.150.0080.00016.86
8.0.140.0020.00516.83
8.0.130.0070.00013.19
8.0.120.0020.00516.77
8.0.110.0000.00716.92
8.0.100.0040.00416.87
8.0.90.0000.00716.78
8.0.80.0120.00316.88
8.0.70.0070.00016.75
8.0.60.0080.00016.72
8.0.50.0000.00716.85
8.0.30.0080.01017.09
8.0.20.0140.01216.94
8.0.10.0060.00316.79
8.0.00.0080.01016.79
7.4.330.0030.00312.92
7.4.320.0030.00616.50
7.4.300.0000.00616.48
7.4.290.0000.00716.39
7.4.280.0000.00816.52
7.4.270.0030.00316.36
7.4.260.0030.00313.29
7.4.250.0080.00316.56
7.4.240.0020.00516.50
7.4.230.0040.00416.33
7.4.220.0100.01016.46
7.4.210.0030.01416.58
7.4.200.0000.00716.39
7.4.190.0040.00416.45
7.4.160.0110.00616.49
7.4.150.0120.00616.57
7.4.140.0130.00516.43
7.4.130.0100.00816.56
7.4.120.0080.00916.39
7.4.110.0070.01016.48
7.4.100.0100.01316.32
7.4.90.0120.00816.49
7.4.80.0090.00619.39
7.4.70.0160.00616.64
7.4.60.0060.01116.49
7.4.50.0000.00816.52
7.4.40.0040.01116.48
7.4.30.0130.00616.57
7.4.00.0090.00914.93
7.3.330.0000.00613.13
7.3.320.0030.00313.13
7.3.310.0030.00316.28
7.3.300.0040.00416.33
7.3.290.0070.01016.28
7.3.280.0100.00816.29
7.3.270.0100.01316.34
7.3.260.0060.01016.54
7.3.250.0100.00916.42
7.3.240.0120.00616.37
7.3.230.0060.01016.36
7.3.210.0310.01616.31
7.3.200.0190.00316.42
7.3.190.0100.00716.34
7.3.180.0120.00816.64
7.3.170.0100.00616.57
7.3.160.0070.01116.36
7.3.120.0120.00314.84
7.3.110.0100.00614.68
7.3.100.0000.01114.71
7.3.90.0070.01014.51
7.3.80.0080.00814.82
7.3.70.0060.01014.86
7.3.60.0070.00714.93
7.3.50.0000.01114.89
7.3.40.0060.00614.58
7.3.30.0070.00314.81
7.3.20.0060.00316.66
7.3.10.0030.00716.70
7.3.00.0060.00916.56
7.2.330.0160.00616.39
7.2.320.0090.01216.71
7.2.310.0060.01916.61
7.2.300.0090.00916.48
7.2.290.0130.00316.65
7.2.250.0130.00314.87
7.2.240.0000.01915.14
7.2.230.0100.00315.01
7.2.220.0000.01415.09
7.2.210.0060.00614.68
7.2.200.0030.00714.58
7.2.190.0040.00814.98
7.2.180.0030.00715.00
7.2.170.0070.00714.95
7.2.60.0100.00616.88
7.2.00.0030.01019.46
7.1.330.0000.01515.86
7.1.320.0070.01016.01
7.1.310.0130.00315.79
7.1.300.0090.00315.46
7.1.290.0070.00715.48
7.1.280.0030.00915.40
7.1.270.0040.01115.57
7.1.260.0030.01315.55
7.1.200.0030.00915.60
7.1.100.0050.00318.21
7.1.70.0000.01116.86
7.1.60.0130.01019.40
7.1.50.0000.01116.87
7.1.00.0030.07322.41
7.0.200.0060.00316.68
7.0.140.0000.07322.08
7.0.120.0070.07022.09
7.0.60.0100.05719.91
7.0.50.0100.05717.88
7.0.40.0100.08320.11
7.0.30.0200.06720.16
7.0.20.0200.06720.19
7.0.10.0270.06720.08
7.0.00.0100.07720.23
5.6.280.0100.09320.92
5.6.210.0130.08320.76
5.6.200.0030.05718.23
5.6.190.0100.09020.47
5.6.180.0230.08020.58
5.6.170.0200.06020.44
5.6.160.0030.09320.57
5.6.150.0070.05718.12
5.6.140.0030.08718.23
5.6.130.0100.03318.18
5.6.120.0100.08321.00
5.6.110.0030.05721.02
5.6.100.0070.08021.01
5.6.90.0170.07721.08
5.6.80.0070.08020.38
5.6.70.0230.07320.36
5.5.350.0270.06720.40
5.5.340.0000.09018.05
5.5.330.0100.07720.21
5.5.320.0000.04320.32
5.5.310.0230.08720.27
5.5.300.0130.07018.05
5.5.290.0030.09317.98
5.5.280.0130.08020.80
5.5.270.0030.04320.95
5.5.260.0100.08020.76
5.5.250.0100.08020.79
5.5.240.0100.07720.15
5.4.450.0100.07019.48
5.4.440.0130.07319.46
5.4.430.0030.05019.19
5.4.420.0070.04019.30
5.4.410.0030.04019.14
5.4.400.0100.04718.93
5.4.390.0000.06319.16
5.4.380.0070.04718.92
5.4.370.0000.04018.92
5.4.360.0100.04719.24
5.4.350.0100.04719.24
5.4.340.0130.03318.85
5.4.320.0030.04019.09
5.4.310.0030.03719.14
5.4.300.0030.08019.15
5.4.290.0070.06719.20
5.4.280.0000.04719.02
5.4.270.0130.06018.85
5.4.260.0030.07018.85
5.4.250.0030.06319.11
5.4.240.0030.03719.14
5.4.230.0130.07018.85
5.4.220.0000.04719.23
5.4.210.0030.03719.16
5.4.200.0100.07018.86
5.4.190.0070.07318.86
5.4.180.0030.04319.23
5.4.170.0100.07018.99
5.4.160.0070.06019.13
5.4.150.0130.07319.13
5.4.140.0100.07316.54
5.4.130.0070.07016.46
5.4.120.0070.07316.32
5.4.110.0070.04016.34
5.4.100.0030.03716.30
5.4.90.0000.05316.39
5.4.80.0070.03716.47
5.4.70.0030.04016.27
5.4.60.0100.03016.47
5.4.50.0100.06316.50
5.4.40.0170.02316.40
5.4.30.0070.06316.39
5.4.20.0100.07016.40
5.4.10.0070.07016.38
5.4.00.0070.04315.91
5.3.290.0000.04014.66
5.3.280.0130.04014.73
5.3.270.0100.05314.49
5.3.260.0030.05014.66
5.3.250.0000.04014.60
5.3.240.0030.05314.64
5.3.230.0070.07314.60
5.3.220.0030.07314.72
5.3.210.0100.05314.62
5.3.200.0030.03714.45
5.3.190.0030.06714.57
5.3.180.0170.04714.56
5.3.170.0100.06014.59
5.3.160.0030.05314.61
5.3.150.0070.04714.55
5.3.140.0070.03714.61
5.3.130.0030.04014.43
5.3.120.0100.05714.70
5.3.110.0000.05314.44
5.3.100.0070.03314.03
5.3.90.0100.04714.01
5.3.80.0100.07014.07
5.3.70.0030.04714.05
5.3.60.0030.05313.89
5.3.50.0030.07714.10
5.3.40.0100.07013.84
5.3.30.0100.04313.88
5.3.20.0100.07013.74
5.3.10.0070.03313.70
5.3.00.0030.03713.67
5.2.170.0030.05711.14
5.2.160.0100.03311.20
5.2.150.0100.06311.15
5.2.140.0070.06311.14
5.2.130.0030.04011.16
5.2.120.0030.05710.99
5.2.110.0000.03311.11
5.2.100.0030.06011.15
5.2.90.0000.03011.15
5.2.80.0030.02711.23
5.2.70.0000.04711.16
5.2.60.0100.02311.00
5.2.50.0030.04011.02
5.2.40.0000.03011.00
5.2.30.0000.03011.02
5.2.20.0030.03310.92
5.2.10.0000.05710.78
5.2.00.0030.05310.75
5.1.60.0000.0579.96
5.1.50.0100.05310.15
5.1.40.0070.0439.98
5.1.30.0000.05710.25
5.1.20.0100.02010.27
5.1.10.0000.05310.09
5.1.00.0000.04010.03
5.0.50.0000.0238.61
5.0.40.0000.0408.32
5.0.30.0070.0608.23
5.0.20.0030.0478.16
5.0.10.0100.0408.24
5.0.00.0170.0578.16
4.4.90.0030.0177.84
4.4.80.0070.0277.84
4.4.70.0030.0277.84
4.4.60.0030.0337.84
4.4.50.0030.0377.84
4.4.40.0000.0377.84
4.4.30.0030.0277.84
4.4.20.0030.0377.84
4.4.10.0000.0207.84
4.4.00.0070.0537.84
4.3.110.0000.0307.84
4.3.100.0030.0177.84
4.3.90.0000.0237.84
4.3.80.0000.0577.84
4.3.70.0000.0307.84
4.3.60.0030.0177.84
4.3.50.0070.0337.84
4.3.40.0000.0407.84
4.3.30.0000.0177.84
4.3.20.0000.0237.84
4.3.10.0000.0177.84
4.3.00.0000.0177.84

preferences:
41.78 ms | 401 KiB | 5 Q