3v4l.org

run code in 300+ PHP versions simultaneously
<?php function retVal() { global $foo; return $foo; } function & retRef() { global $foo; return $foo; } unset($foo, $bar); $foo = 'init'; $bar = retVal(); $bar = 'bar'; var_dump($foo, $bar); unset($foo, $bar); $foo = 'init'; $bar = retRef(); $bar = 'bar'; var_dump($foo, $bar); unset($foo, $bar); $foo = 'init'; $bar = & retVal(); $bar = 'bar'; var_dump($foo, $bar); unset($foo, $bar); $foo = 'init'; $bar = & retRef(); $bar = 'bar'; var_dump($foo, $bar);

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)
8.3.60.0100.01018.55
8.3.50.0100.00821.99
8.3.40.0090.00618.92
8.3.30.0030.01020.40
8.3.20.0080.00018.77
8.3.10.0030.00521.00
8.3.00.0090.00019.56
8.2.180.0110.01116.61
8.2.170.0120.00322.96
8.2.160.0140.00020.50
8.2.150.0040.00424.18
8.2.140.0000.00724.66
8.2.130.0000.00726.16
8.2.120.0070.00721.04
8.2.110.0050.00519.39
8.2.100.0080.00317.72
8.2.90.0040.00419.04
8.2.80.0000.00817.97
8.2.70.0000.00917.63
8.2.60.0000.00917.92
8.2.50.0040.00418.10
8.2.40.0090.00318.07
8.2.30.0070.00019.43
8.2.20.0040.00417.73
8.2.10.0020.00517.77
8.2.00.0050.00317.69
8.1.280.0110.00725.92
8.1.270.0060.00323.99
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0000.00923.92
8.1.230.0040.00717.71
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0060.00317.35
8.1.190.0080.00017.22
8.1.180.0000.00918.10
8.1.170.0030.00618.65
8.1.160.0070.00018.72
8.1.150.0070.00418.48
8.1.140.0060.00317.40
8.1.130.0030.00317.78
8.1.120.0080.00017.45
8.1.110.0000.00817.38
8.1.100.0000.00717.41
8.1.90.0000.00717.31
8.1.80.0000.00717.31
8.1.70.0080.00017.39
8.1.60.0000.00917.51
8.1.50.0000.00717.37
8.1.40.0040.00417.44
8.1.30.0040.00417.54
8.1.20.0040.00417.57
8.1.10.0070.00017.46
8.1.00.0080.00017.44
8.0.300.0040.00418.77
8.0.290.0040.00416.75
8.0.280.0030.00318.45
8.0.270.0030.00317.17
8.0.260.0040.00416.68
8.0.250.0000.00717.00
8.0.240.0040.00416.93
8.0.230.0000.00716.85
8.0.220.0070.00216.81
8.0.210.0040.00416.84
8.0.200.0070.00317.02
8.0.190.0030.00316.88
8.0.180.0040.00416.83
8.0.170.0050.00216.84
8.0.160.0060.00316.98
8.0.150.0000.00716.83
8.0.140.0030.00516.82
8.0.130.0000.00613.27
8.0.120.0000.00716.80
8.0.110.0080.00016.93
8.0.100.0000.00716.91
8.0.90.0070.00016.82
8.0.80.0030.01416.89
8.0.70.0040.00416.90
8.0.60.0040.00416.80
8.0.50.0000.00716.80
8.0.30.0160.00317.00
8.0.20.0100.01217.40
8.0.10.0050.00317.03
8.0.00.0140.00516.75
7.4.330.0020.00216.84
7.4.320.0050.00316.41
7.4.300.0000.00716.65
7.4.290.0000.00716.47
7.4.280.0080.00016.52
7.4.270.0000.00716.63
7.4.260.0030.00313.25
7.4.250.0040.00416.57
7.4.240.0000.00716.61
7.4.230.0030.00316.66
7.4.220.0130.00616.58
7.4.210.0030.01116.56
7.4.200.0000.00716.43
7.4.190.0030.00316.53
7.4.160.0080.00816.50
7.4.150.0210.00717.40
7.4.140.0120.00817.86
7.4.130.0140.00316.45
7.4.120.0090.00916.55
7.4.110.0190.00616.52
7.4.100.0060.01316.57
7.4.90.0150.00316.42
7.4.80.0120.00619.39
7.4.70.0140.00616.41
7.4.60.0120.00616.34
7.4.50.0040.00416.38
7.4.40.0020.01022.77
7.4.30.0090.01216.46
7.4.00.0040.01415.16
7.3.330.0050.00013.32
7.3.320.0050.00013.32
7.3.310.0030.00316.33
7.3.300.0000.00716.31
7.3.290.0090.01016.32
7.3.280.0070.01016.33
7.3.270.0120.00617.40
7.3.260.0160.01518.24
7.3.250.0080.01016.43
7.3.240.0150.00316.30
7.3.230.0070.01016.42
7.3.210.0030.01616.45
7.3.200.0120.00919.39
7.3.190.0070.01016.26
7.3.180.0090.00916.40
7.3.170.0110.00516.27
7.3.160.0090.00916.33
7.3.120.0060.00815.05
7.2.330.0150.02216.25
7.2.320.0070.01116.64
7.2.310.0060.01616.41
7.2.300.0080.00816.61
7.2.290.0110.00616.43
7.2.60.0080.00616.61
7.2.00.0000.00919.31
7.1.200.0090.00615.66
7.1.70.0040.00417.10
7.1.60.6440.00733.18
7.1.50.0060.01616.90
7.1.00.0070.03322.40
7.0.200.0030.01416.46
7.0.140.0100.06722.04
7.0.100.0070.04720.01
7.0.90.0070.07719.85
7.0.80.0000.06019.95
7.0.70.0170.05319.94
7.0.60.0100.07719.93
7.0.50.0030.08320.30
7.0.40.0100.06720.09
7.0.30.0130.07319.95
7.0.20.0030.06720.03
7.0.10.0030.09320.16
7.0.00.0070.08719.98
5.6.280.0100.06721.11
5.6.250.0030.05020.72
5.6.240.0100.06720.70
5.6.230.0030.06320.62
5.6.220.0100.08020.68
5.6.210.0070.08320.64
5.6.200.0000.08721.04
5.6.190.0070.08021.04
5.6.180.0030.08021.05
5.6.170.0130.07721.11
5.6.160.0170.06321.11
5.6.150.0030.04721.11
5.6.140.0000.09021.08
5.6.130.0070.08021.09
5.6.120.0170.07020.95
5.6.110.0200.03721.07
5.6.100.0230.06721.13
5.6.90.0100.08320.93
5.6.80.0100.07720.43
5.6.70.0100.04720.40
5.6.60.0130.07720.47
5.6.50.0130.04020.34
5.6.40.0070.04720.39
5.6.30.0100.07720.32
5.6.20.0030.04320.43
5.6.10.0030.04720.37
5.6.00.0000.07020.41
5.5.380.0000.04720.46
5.5.370.0070.08320.52
5.5.360.0070.04320.37
5.5.350.0000.04720.45
5.5.340.0030.07720.78
5.5.330.0130.08020.78
5.5.320.0130.04320.83
5.5.310.0170.05320.76
5.5.300.0070.04320.93
5.5.290.0070.07720.91
5.5.280.0070.06020.72
5.5.270.0130.07320.82
5.5.260.0130.03320.73
5.5.250.0200.05320.72
5.5.240.0100.05720.26
5.5.230.0030.08020.27
5.5.220.0030.07720.23
5.5.210.0070.07720.29
5.5.200.0070.07020.19
5.5.190.0130.07020.27
5.5.180.0070.07320.23
5.5.160.0030.09320.28
5.5.150.0130.05720.24
5.5.140.0130.04020.27
5.5.130.0100.06720.26
5.5.120.0130.05719.99
5.5.110.0130.07320.11
5.5.100.0070.07320.16
5.5.90.0000.08020.01
5.5.80.0030.08020.15
5.5.70.0130.07020.09
5.5.60.0130.03720.03
5.5.50.0100.07020.09
5.5.40.0100.06020.08
5.5.30.0030.07720.09
5.5.20.0100.04320.05
5.5.10.0100.06720.04
5.5.00.0030.06720.04
5.4.450.0070.07719.42
5.4.440.0030.08719.47
5.4.430.0200.04019.48
5.4.420.0070.07019.42
5.4.410.0130.04719.32
5.4.400.0100.07319.13
5.4.390.0100.07019.13
5.4.380.0070.07019.09
5.4.370.0030.07719.05
5.4.360.0070.06718.88
5.4.350.0000.07719.09
5.4.340.0070.08019.02
5.4.320.0100.04019.05
5.4.310.0030.06319.21
5.4.300.0030.04318.90
5.4.290.0030.04018.89
5.4.280.0030.07019.21
5.4.270.0100.07018.88
5.4.260.0100.07718.94
5.4.250.0130.05319.04
5.4.240.0100.07319.04
5.4.230.0030.05019.20
5.4.220.0130.06718.84
5.4.210.0130.06718.89
5.4.200.0070.05319.11
5.4.190.0130.06319.20
5.4.180.0070.06719.17
5.4.170.0000.07319.08
5.4.160.0030.05019.11
5.4.150.0170.05019.14
5.4.140.0000.04016.47
5.4.130.0100.05016.50
5.4.120.0100.06016.48
5.4.110.0130.08316.48
5.4.100.0070.07016.49
5.4.90.0170.06016.45
5.4.80.0100.04716.54
5.4.70.0000.04016.35
5.4.60.0030.06316.37
5.4.50.0200.05316.48
5.4.40.0070.07016.50
5.4.30.0030.04016.50
5.4.20.0030.03716.33
5.4.10.0070.03316.40
5.4.00.0070.03015.63
5.3.290.0070.08314.60
5.3.280.0070.07314.70
5.3.270.0070.04014.57
5.3.260.0130.06314.60
5.3.250.0070.04014.58
5.3.240.0030.07714.75
5.3.230.0000.04314.65
5.3.220.0070.06314.63
5.3.210.0130.07014.55
5.3.200.0070.07314.68
5.3.190.0130.06714.57
5.3.180.0070.04714.68
5.3.170.0100.07014.64
5.3.160.0070.04714.69
5.3.150.0030.05014.62
5.3.140.0130.03314.66
5.3.130.0130.03014.54
5.3.120.0030.04314.56
5.3.110.0000.04014.51
5.3.100.0030.03714.16
5.3.90.0070.04013.99
5.3.80.0000.04014.14
5.3.70.0000.04014.00
5.3.60.0030.04013.98
5.3.50.0030.03713.88
5.3.40.0000.04013.86
5.3.30.0000.04014.00
5.3.20.0030.02713.61
5.3.10.0000.03713.78
5.3.00.0000.03713.78
5.2.170.0000.03012.14
5.2.160.0100.02312.14
5.2.150.0030.02712.14
5.2.140.0030.03012.14
5.2.130.0000.03012.14
5.2.120.0030.02712.14
5.2.110.0000.02712.14
5.2.100.0030.02712.14
5.2.90.0030.02312.14
5.2.80.0000.02712.14
5.2.70.0070.02312.14
5.2.60.0000.02712.14
5.2.50.0000.03312.14
5.2.40.0070.02012.14
5.2.30.0000.02712.14
5.2.20.0000.03012.14
5.2.10.0000.02712.14
5.2.00.0000.03012.14
5.1.60.0000.02012.14
5.1.50.0030.03012.14
5.1.40.0030.03012.14
5.1.30.0070.02012.14
5.1.20.0030.02012.14
5.1.10.0030.02312.14
5.1.00.0100.01712.14
5.0.50.0100.01312.14
5.0.40.0000.02012.14
5.0.30.0030.03012.14
5.0.20.0000.01712.14
5.0.10.0000.01712.14
5.0.00.0030.02312.14
4.4.90.0000.01712.14
4.4.80.0030.01312.14
4.4.70.0000.01712.14
4.4.60.0000.02012.14
4.4.50.0030.01312.14
4.4.40.0030.02312.14
4.4.30.0000.01712.14
4.4.20.0030.01312.14
4.4.10.0000.01712.14
4.4.00.0030.02312.14
4.3.110.0000.01712.14
4.3.100.0030.01312.14
4.3.90.0000.01712.14
4.3.80.0030.02712.14
4.3.70.0000.01712.14
4.3.60.0030.01712.14
4.3.50.0030.01312.14
4.3.40.0030.02012.14
4.3.30.0030.01312.14
4.3.20.0000.01712.14
4.3.10.0000.01712.14
4.3.00.0000.01712.14

preferences:
39.04 ms | 401 KiB | 5 Q