3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = 0; var_dump($x); $a = array(&$x); var_dump($a); $b = $a; $x = 2; var_dump($a); unset($x); $b[1]++; $b[0]++; echo $a[0], ' ', $b[0];

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)
8.3.60.0070.00718.43
8.3.50.0160.00521.26
8.3.40.0090.00618.94
8.3.30.0100.00319.12
8.3.20.0050.00320.34
8.3.10.0040.00423.61
8.3.00.0060.00317.75
8.2.180.0070.01016.88
8.2.170.0070.00722.96
8.2.160.0090.00619.25
8.2.150.0060.00324.18
8.2.140.0000.00824.66
8.2.130.0050.00326.16
8.2.120.0080.00019.95
8.2.110.0000.00922.25
8.2.100.0080.00417.88
8.2.90.0070.00019.34
8.2.80.0030.00617.97
8.2.70.0000.00817.63
8.2.60.0080.00017.92
8.2.50.0000.01118.07
8.2.40.0000.00819.79
8.2.30.0040.00418.04
8.2.20.0090.00017.84
8.2.10.0040.00418.12
8.2.00.0080.00017.85
8.1.280.0100.01025.92
8.1.270.0030.00724.01
8.1.260.0090.00026.35
8.1.250.0040.00428.09
8.1.240.0060.00324.00
8.1.230.0090.00319.01
8.1.220.0000.00817.74
8.1.210.0040.00418.77
8.1.200.0090.00017.35
8.1.190.0040.00417.23
8.1.180.0040.00418.10
8.1.170.0040.00418.53
8.1.160.0000.00822.07
8.1.150.0000.00718.92
8.1.140.0050.00317.38
8.1.130.0000.00717.74
8.1.120.0000.00717.38
8.1.110.0060.00317.52
8.1.100.0030.00517.41
8.1.90.0040.00417.33
8.1.80.0040.00417.40
8.1.70.0000.00717.32
8.1.60.0030.00617.63
8.1.50.0000.00817.49
8.1.40.0070.00017.39
8.1.30.0050.00317.63
8.1.20.0080.00017.54
8.1.10.0000.00717.56
8.1.00.0020.00517.39
8.0.300.0030.00618.77
8.0.290.0060.00316.63
8.0.280.0000.00618.31
8.0.270.0020.00517.14
8.0.260.0040.00417.17
8.0.250.0030.00316.92
8.0.240.0070.00016.99
8.0.230.0030.00616.99
8.0.220.0050.00316.87
8.0.210.0030.00316.96
8.0.200.0070.00017.02
8.0.190.0000.00817.00
8.0.180.0000.00817.00
8.0.170.0030.00616.87
8.0.160.0070.00016.89
8.0.150.0000.00716.94
8.0.140.0000.00716.86
8.0.130.0000.00613.44
8.0.120.0000.00816.91
8.0.110.0040.00416.84
8.0.100.0050.00216.84
8.0.90.0040.00416.92
8.0.80.0030.01816.96
8.0.70.0000.00816.76
8.0.60.0070.00016.82
8.0.50.0000.00816.85
8.0.30.0070.01217.07
8.0.20.0060.01517.40
8.0.10.0040.00417.13
8.0.00.0090.00916.85
7.4.330.0050.00015.00
7.4.320.0000.00616.56
7.4.300.0030.00316.61
7.4.290.0030.00316.34
7.4.280.0050.00316.43
7.4.270.0000.00616.50
7.4.260.0070.00316.40
7.4.250.0040.00416.50
7.4.240.0020.00516.50
7.4.230.0000.00716.62
7.4.220.0120.01116.39
7.4.210.0030.01016.51
7.4.200.0030.00516.49
7.4.160.0080.00816.56
7.4.150.0060.01217.40
7.4.140.0100.00817.86
7.4.130.0140.00716.46
7.4.120.0080.01016.50
7.4.110.0090.00916.57
7.4.100.0150.00316.61
7.4.90.0120.00616.63
7.4.80.0000.02019.39
7.4.70.0100.00716.50
7.4.60.0090.00816.43
7.4.50.0000.00616.61
7.4.40.0100.00716.45
7.4.30.0150.00716.48
7.4.00.0070.00915.10
7.3.330.0030.00313.22
7.3.320.0050.00013.22
7.3.310.0070.00016.23
7.3.300.0070.00016.22
7.3.290.0030.01416.42
7.3.280.0090.00816.42
7.3.270.0150.00317.40
7.3.260.0100.01316.48
7.3.250.0070.00916.45
7.3.240.0130.00616.34
7.3.230.0120.00916.54
7.3.210.0130.00616.53
7.3.200.0070.01119.39
7.3.190.0150.00016.48
7.3.180.0130.00416.37
7.3.170.0080.00816.63
7.3.160.0060.00916.46
7.3.120.0060.01014.92
7.3.110.0060.01014.67
7.3.100.0040.01114.93
7.3.90.0090.00614.84
7.3.80.0060.00515.00
7.3.70.0020.00714.85
7.3.60.0050.00814.90
7.3.50.0080.00314.93
7.3.40.0040.01114.59
7.3.30.0070.00414.83
7.3.20.0090.00616.60
7.3.10.0050.01016.60
7.3.00.0080.00516.63
7.2.330.0070.01116.50
7.2.320.0110.00616.63
7.2.310.0260.02916.43
7.2.300.0120.00916.72
7.2.290.0070.01016.71
7.2.250.0080.00814.85
7.2.240.0060.01315.04
7.2.230.0080.00814.92
7.2.220.0090.00715.07
7.2.210.0020.01014.98
7.2.200.0040.00915.14
7.2.190.0040.00815.12
7.2.180.0110.00515.07
7.2.170.0050.00715.05
7.2.00.0000.01319.02
7.1.330.0050.00815.90
7.1.320.0070.00515.92
7.1.310.0050.00815.84
7.1.300.0060.00615.76
7.1.290.0120.00315.70
7.1.280.0030.00915.74
7.1.270.0030.00815.81
7.1.260.0050.00915.78
7.1.100.0000.01118.14
7.1.70.0030.01017.38
7.1.60.0100.01419.32
7.1.50.0040.01816.84
7.1.00.0030.07322.40
7.0.200.0030.00716.46
7.0.140.0030.07721.95
7.0.60.0170.07019.95
7.0.50.0130.06717.88
7.0.40.0030.04320.20
7.0.30.0130.04320.13
7.0.20.0330.05720.04
7.0.10.0170.07720.20
7.0.00.0030.06020.16
5.6.280.0070.07020.92
5.6.210.0070.04720.72
5.6.200.0100.08018.17
5.6.190.0000.05020.60
5.6.180.0430.06320.67
5.6.170.0170.04320.33
5.6.160.0130.03320.47
5.6.150.0000.04018.12
5.6.140.0070.07718.25
5.6.130.0030.08018.21
5.6.120.0070.04021.04
5.6.110.0070.08720.95
5.6.100.0030.04320.99
5.6.90.0100.08020.94
5.6.80.0130.07320.46
5.5.350.0130.08320.43
5.5.340.0000.05717.88
5.5.330.0070.03720.40
5.5.320.0330.06320.33
5.5.310.0300.07320.24
5.5.300.0100.07718.00
5.5.290.0070.04017.95
5.5.280.0100.06320.83
5.5.270.0070.04020.86
5.5.260.0100.08020.87
5.5.250.0070.07720.60
5.5.240.0300.06720.25
5.4.450.0870.07019.24
5.4.440.0370.06019.47
5.4.430.0230.06019.09
5.4.420.0630.00019.46
5.4.410.0630.00019.57
5.4.400.0670.00019.00
5.4.390.0630.00019.26
5.4.380.0630.00018.95
5.4.370.0600.00019.07
5.4.360.0600.00018.94
5.4.350.0670.00019.13
5.4.340.0040.03711.97
5.4.320.0070.03612.45
5.4.310.0050.04212.45
5.4.300.0100.03112.45
5.4.290.0060.04112.45
5.4.280.0060.03612.34
5.4.270.0050.04012.35
5.4.260.0080.03612.34
5.4.250.0030.04112.34
5.4.240.0050.03812.35
5.4.230.0060.03812.34
5.4.220.0060.04212.34
5.4.210.0050.04012.34
5.4.200.0050.03912.34
5.4.190.0070.03512.34
5.4.180.0100.03412.33
5.4.170.0090.04512.34
5.4.160.0040.04112.34
5.4.150.0060.03812.34
5.4.140.0080.03712.02
5.4.130.0090.03412.01
5.4.120.0090.03411.96
5.4.110.0040.04011.96
5.4.100.0060.03811.96
5.4.90.0060.04111.96
5.4.80.0070.04511.96
5.4.70.0040.03911.96
5.4.60.0060.03811.96
5.4.50.0050.03911.96
5.4.40.0070.03511.95
5.4.30.0100.03111.95
5.4.20.0060.03611.95
5.4.10.0060.03411.95
5.4.00.0060.03611.43
5.3.290.0060.03912.80
5.3.280.0070.03912.71
5.3.270.0090.04012.73
5.3.260.0050.04212.72
5.3.250.0080.04312.72
5.3.240.0070.04012.72
5.3.230.0080.03912.71
5.3.220.0050.04312.68
5.3.210.0080.04212.68
5.3.200.0080.03812.68
5.3.190.0050.04012.68
5.3.180.0050.03812.68
5.3.170.0060.03712.67
5.3.160.0060.03712.67
5.3.150.0070.03612.68
5.3.140.0060.03812.66
5.3.130.0070.03812.66
5.3.120.0110.04112.66
5.3.110.0040.04712.66
5.3.100.0070.04012.12
5.3.90.0080.04112.08
5.3.80.0070.05012.08
5.3.70.0090.03612.07
5.3.60.0070.05012.06
5.3.50.0070.03712.00
5.3.40.0080.03612.00
5.3.30.0080.03611.94
5.3.20.0050.03911.72
5.3.10.0070.03511.69
5.3.00.0040.03911.68
5.2.170.0040.0329.18
5.2.160.0030.0319.18
5.2.150.0060.0299.18
5.2.140.0040.0349.18
5.2.130.0020.0369.13
5.2.120.0030.0339.14
5.2.110.0030.0399.14
5.2.100.0070.0379.14
5.2.90.0050.0339.14
5.2.80.0070.0289.13
5.2.70.0030.0429.14
5.2.60.0050.0329.08
5.2.50.0040.0329.06
5.2.40.0020.0369.04
5.2.30.0070.0309.01
5.2.20.0050.0309.00
5.2.10.0030.0308.93
5.2.00.0050.0298.79
5.1.60.0050.0248.07
5.1.50.0070.0268.07
5.1.40.0060.0268.05
5.1.30.0050.0288.41
5.1.20.0030.0318.43
5.1.10.0040.0268.15
5.1.00.0050.0278.15
5.0.50.0040.0196.63
5.0.40.0040.0186.49
5.0.30.0040.0316.30
5.0.20.0040.0196.27
5.0.10.0040.0276.25
5.0.00.0040.0336.23
4.4.90.0040.0214.77
4.4.80.0030.0174.76
4.4.70.0050.0154.76
4.4.60.0040.0194.75
4.4.50.0030.0154.77
4.4.40.0010.0274.71
4.4.30.0020.0174.76
4.4.20.0030.0194.84
4.4.10.0020.0174.85
4.4.00.0050.0274.76
4.3.110.0040.0224.67
4.3.100.0030.0184.67
4.3.90.0080.0164.63
4.3.80.0030.0244.58
4.3.70.0010.0164.63
4.3.60.0020.0154.63
4.3.50.0020.0174.63
4.3.40.0020.0254.54
4.3.30.0010.0173.30
4.3.20.0010.0183.27
4.3.10.0020.0203.23
4.3.00.0170.0207.11

preferences:
58.76 ms | 401 KiB | 5 Q