3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(); $a[] = &$a; var_dump($a); $a[0] = 1; var_dump($a); echo "-------------------\n"; $a = array(); $a[] = &$a; //$b = unserialize(serialize($a)); $b = $a; var_dump($b); $b[0] = 1; var_dump($b);

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)
8.3.60.0210.00018.43
8.3.50.0100.01021.08
8.3.40.0130.00718.97
8.3.30.0040.01120.20
8.3.20.0000.00818.58
8.3.10.0080.00021.27
8.3.00.0050.00223.69
8.2.180.0040.01116.50
8.2.170.0000.01522.96
8.2.160.0060.01320.34
8.2.150.0050.00324.18
8.2.140.0060.00324.66
8.2.130.0070.00026.16
8.2.120.0070.00019.83
8.2.110.0030.00621.11
8.2.100.0060.00617.72
8.2.90.0000.00819.34
8.2.80.0030.00617.97
8.2.70.0060.00317.49
8.2.60.0000.00818.05
8.2.50.0030.00518.07
8.2.40.0060.00318.34
8.2.30.0040.00419.31
8.2.20.0060.00317.64
8.2.10.0080.00017.70
8.2.00.0030.00617.67
8.1.280.0150.00625.92
8.1.270.0050.00323.99
8.1.260.0070.00026.35
8.1.250.0070.00728.09
8.1.240.0060.00321.42
8.1.230.0120.00017.52
8.1.220.0080.00017.74
8.1.210.0060.00318.77
8.1.200.0000.01017.36
8.1.190.0000.00817.23
8.1.180.0030.00518.10
8.1.170.0000.00818.44
8.1.160.0070.00318.81
8.1.150.0030.00518.57
8.1.140.0050.00217.38
8.1.130.0030.00317.70
8.1.120.0000.00917.41
8.1.110.0000.00817.38
8.1.100.0000.00717.40
8.1.90.0040.00417.42
8.1.80.0070.00017.29
8.1.70.0030.00317.34
8.1.60.0030.00517.54
8.1.50.0030.00517.45
8.1.40.0040.00417.47
8.1.30.0030.00517.61
8.1.20.0000.00817.52
8.1.10.0050.00217.46
8.1.00.0040.00417.49
8.0.300.0090.00018.77
8.0.290.0000.00716.75
8.0.280.0000.00718.45
8.0.270.0070.00017.13
8.0.260.0060.00016.72
8.0.250.0070.00016.95
8.0.240.0050.00316.76
8.0.230.0030.00316.93
8.0.220.0030.00316.75
8.0.210.0000.00916.82
8.0.200.0000.00616.79
8.0.190.0040.00416.87
8.0.180.0000.01016.75
8.0.170.0060.00316.71
8.0.160.0000.00816.77
8.0.150.0000.00816.80
8.0.140.0070.00016.77
8.0.130.0030.00313.18
8.0.120.0040.00416.69
8.0.110.0070.00016.84
8.0.100.0070.00016.85
8.0.90.0040.00416.77
8.0.80.0070.01616.69
8.0.70.0030.00516.76
8.0.60.0040.00416.84
8.0.50.0000.00716.88
8.0.30.0050.01316.90
8.0.20.0150.00517.40
8.0.10.0070.00016.81
8.0.00.0070.01216.92
7.4.330.0020.00216.83
7.4.320.0060.00016.55
7.4.300.0070.00016.30
7.4.290.0030.00316.29
7.4.280.0030.00316.50
7.4.270.0040.00416.46
7.4.260.0030.00313.16
7.4.250.0050.00316.35
7.4.240.0030.00316.58
7.4.230.0020.00516.34
7.4.220.0060.01316.35
7.4.210.0060.00916.50
7.4.200.0040.00416.23
7.4.190.0000.00716.67
7.4.160.0080.00816.24
7.4.150.0110.00717.40
7.4.140.0080.01317.86
7.4.130.0110.00716.45
7.4.120.0110.00716.53
7.4.110.0070.01316.50
7.4.100.0030.02016.55
7.4.90.0080.01316.39
7.4.80.0070.01019.39
7.4.70.0060.00916.65
7.4.60.0190.00316.40
7.4.50.0030.00616.41
7.4.40.0030.01022.77
7.4.30.0180.00316.42
7.4.00.0030.01215.12
7.3.330.0000.00613.11
7.3.320.0000.00513.09
7.3.310.0040.00416.26
7.3.300.0030.00316.21
7.3.290.0100.00316.17
7.3.280.0110.00816.23
7.3.270.0070.01017.40
7.3.260.0070.01418.24
7.3.250.0080.01216.36
7.3.240.0070.01016.52
7.3.230.0060.01516.39
7.3.210.0140.00316.65
7.3.200.0060.01219.39
7.3.190.0120.00616.34
7.3.180.0080.00816.50
7.3.170.0110.00516.27
7.3.160.0180.00416.68
7.3.120.0060.00614.65
7.3.10.0000.01516.46
7.3.00.0060.00916.48
7.2.330.0150.00416.65
7.2.320.0200.00316.65
7.2.310.0110.01316.78
7.2.300.0060.00916.27
7.2.290.0060.01216.88
7.2.130.0000.01516.55
7.2.120.0060.00916.93
7.2.110.0110.00416.79
7.2.100.0090.00316.94
7.2.90.0110.00716.62
7.2.80.0070.00316.79
7.2.70.0060.00916.97
7.2.60.0110.00416.87
7.2.50.0060.00816.94
7.2.40.0120.00316.82
7.2.30.0050.00516.94
7.2.20.0030.01016.86
7.2.10.0030.00916.77
7.2.00.0060.00616.90
7.1.250.0100.00315.59
7.1.200.0090.00615.62
7.1.70.0060.00316.86
7.1.60.0060.01819.17
7.1.50.0060.01316.91
7.1.00.0030.03322.37
7.0.200.0030.00316.86
7.0.140.0070.07021.95
7.0.70.0000.08721.66
7.0.60.0070.07321.66
7.0.50.0070.08022.19
7.0.40.0070.08020.03
7.0.30.0070.08719.93
7.0.20.0000.09020.03
7.0.10.0030.06720.06
7.0.00.0030.08319.92
5.6.280.0070.07021.11
5.6.220.0070.05720.64
5.6.210.0170.05020.60
5.6.200.0030.08021.02
5.6.190.0070.08021.11
5.6.180.0100.07721.06
5.6.170.0030.08320.94
5.6.160.0030.08020.92
5.6.150.0130.07321.04
5.6.140.0030.08721.00
5.6.130.0000.09320.99
5.6.120.0070.05721.07
5.6.110.0100.03721.02
5.6.100.0100.07021.04
5.6.90.0030.05020.95
5.6.80.0130.07020.43
5.6.70.0070.08020.38
5.6.60.0030.07720.41
5.6.50.0000.06020.38
5.6.40.0000.05320.28
5.6.30.0030.08020.43
5.6.20.0000.04020.39
5.6.10.0070.03720.46
5.6.00.0070.06020.38
5.5.360.0030.07320.25
5.5.350.0070.07320.41
5.5.340.0130.07320.92
5.5.330.0000.08320.71
5.5.320.0030.05020.80
5.5.310.0100.07020.84
5.5.300.0030.08020.89
5.5.290.0070.08720.86
5.5.280.0070.08720.71
5.5.270.0130.06720.74
5.5.260.0030.09020.83
5.5.250.0000.06720.65
5.5.240.0100.05020.16
5.5.230.0070.07320.24
5.5.220.0030.08020.11
5.5.210.0030.08020.19
5.5.200.0100.06320.22
5.5.190.0100.06320.09
5.5.180.0030.04020.09
5.5.160.0000.05720.19
5.5.150.0000.07720.23
5.5.140.0070.06320.22
5.5.130.0100.05019.96
5.5.120.0000.07720.16
5.5.110.0000.08020.25
5.5.100.0100.07719.97
5.5.90.0100.06020.12
5.5.80.0070.07320.07
5.5.70.0100.07020.04
5.5.60.0030.07720.03
5.5.50.0030.07020.07
5.5.40.0070.06319.94
5.5.30.0000.07720.11
5.5.20.0100.07320.02
5.5.10.0070.07720.01
5.5.00.0070.07319.93
5.4.450.0070.07719.38
5.4.440.0100.06719.38
5.4.430.0030.08019.53
5.4.420.0100.06319.29
5.4.410.0030.04719.28
5.4.400.0000.05319.02
5.4.390.0000.06018.99
5.4.380.0030.04018.96
5.4.370.0030.06319.11
5.4.360.0070.07318.80
5.4.350.0070.04718.94
5.4.340.0030.06019.11
5.4.320.0030.06019.09
5.4.310.0070.06718.77
5.4.300.0030.06318.96
5.4.290.0000.06019.03
5.4.280.0030.08019.11
5.4.270.0030.07318.93
5.4.260.0100.06719.05
5.4.250.0070.07019.05
5.4.240.0070.07318.93
5.4.230.0030.07719.13
5.4.220.0070.07718.94
5.4.210.0000.08018.88
5.4.200.0030.07319.05
5.4.190.0100.07019.00
5.4.180.0100.07719.00
5.4.170.0000.07719.02
5.4.160.0000.07719.02
5.4.150.0070.06318.75
5.4.140.0070.06316.30
5.4.130.0070.07316.21
5.4.120.0070.06316.22
5.4.110.0030.07716.31
5.4.100.0000.07316.25
5.4.90.0070.07016.31
5.4.80.0030.07316.42
5.4.70.0030.07016.18
5.4.60.0070.07016.34
5.4.50.0030.07316.22
5.4.40.0000.07016.32
5.4.30.0070.06316.30
5.4.20.0030.07316.21
5.4.10.0070.05316.38
5.4.00.0000.06315.71
5.3.290.0030.06014.65
5.3.280.0000.07714.53
5.3.270.0070.07314.44
5.3.260.0030.07314.56
5.3.250.0030.06714.59
5.3.240.0000.07714.61
5.3.230.0100.06714.58
5.3.220.0000.07714.57
5.3.210.0030.05714.53
5.3.200.0070.04714.54
5.3.190.0030.07314.57
5.3.180.0030.07314.51
5.3.170.0000.07314.55
5.3.160.0030.07714.39
5.3.150.0030.07314.52
5.3.140.0070.07014.38
5.3.130.0000.07714.51
5.3.120.0070.06014.54
5.3.110.0100.06714.38
5.3.100.0000.07714.02
5.3.90.0070.05714.01
5.3.80.0000.04713.86
5.3.70.0000.03713.99
5.3.60.0000.03713.98
5.3.50.0030.03013.70
5.3.40.0000.03713.93
5.3.30.0030.03313.77
5.3.20.0000.03713.59
5.3.10.0000.03313.43
5.3.00.0000.03013.63
5.2.170.0030.02711.13
5.2.160.0000.03011.21
5.2.150.0000.03011.11
5.2.140.0000.03711.11
5.2.130.0030.02311.15
5.2.120.0000.02711.11
5.2.110.0000.02711.11
5.2.100.0000.03011.11
5.2.90.0000.03011.11
5.2.80.0000.02311.16
5.2.70.0000.02711.11
5.2.60.0000.03711.11
5.2.50.0000.02711.11
5.2.40.0000.03711.11
5.2.30.0000.04311.11
5.2.20.0000.04311.11
5.2.10.0000.03711.11
5.2.00.0030.05011.11
5.1.60.0070.03311.11
5.1.50.0030.02311.11
5.1.40.0000.05711.11
5.1.30.0000.03311.11
5.1.20.0030.06011.11
5.1.10.0000.04011.11
5.1.00.0070.04011.11
5.0.50.0070.04311.11
5.0.40.0000.04311.11
5.0.30.0030.04011.11
5.0.20.0000.02011.11
5.0.10.0030.02311.11
5.0.00.0070.03011.11
4.4.90.0000.01711.11
4.4.80.0030.01711.11
4.4.70.0000.03711.11
4.4.60.0030.02311.11
4.4.50.0030.01311.11
4.4.40.0000.02311.11
4.4.30.0000.02011.11
4.4.20.0000.02711.11
4.4.10.0030.02011.11
4.4.00.0000.04311.11
4.3.110.0000.02311.11
4.3.100.0030.01311.11
4.3.90.0000.02011.11
4.3.80.0000.02711.11
4.3.70.0030.01711.11
4.3.60.0000.01311.11
4.3.50.0000.01311.11
4.3.40.0000.03011.11
4.3.30.0000.01711.11
4.3.20.0030.01311.11
4.3.10.0000.02011.11
4.3.00.0030.01311.11

preferences:
48.61 ms | 401 KiB | 5 Q