3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = 0; $a = array(&$x); // [&0] $b = $a; // [&0] $x = 2; // a=[&2], b=[&2] unset($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)
8.3.70.0120.00916.74
8.3.60.0170.00318.43
8.3.50.0120.01221.95
8.3.40.0120.00419.09
8.3.30.0070.00719.06
8.3.20.0100.00320.30
8.3.10.0040.00423.67
8.3.00.0070.00719.38
8.2.180.0160.00316.75
8.2.170.0140.00722.96
8.2.160.0090.00620.35
8.2.150.0030.00524.18
8.2.140.0060.00324.66
8.2.130.0070.00726.16
8.2.120.0040.00422.24
8.2.110.0090.00020.52
8.2.100.0000.01118.09
8.2.90.0050.00219.17
8.2.80.0080.00017.97
8.2.70.0040.00417.75
8.2.60.0000.00818.05
8.2.50.0040.00418.07
8.2.40.0000.00819.93
8.2.30.0050.00218.22
8.2.20.0040.00417.70
8.2.10.0080.00017.98
8.2.00.0030.00817.79
8.1.280.0140.00725.92
8.1.270.0070.01323.88
8.1.260.0000.00726.35
8.1.250.0100.00628.09
8.1.240.0000.01123.83
8.1.230.0120.00019.08
8.1.220.0000.00817.76
8.1.210.0030.00518.77
8.1.200.0080.00017.35
8.1.190.0060.00316.98
8.1.180.0070.00018.10
8.1.170.0090.00018.43
8.1.160.0040.00422.00
8.1.150.0080.00018.88
8.1.140.0000.00717.48
8.1.130.0060.00317.82
8.1.120.0000.00717.46
8.1.110.0080.00017.44
8.1.100.0080.00017.32
8.1.90.0000.00717.43
8.1.80.0070.00017.40
8.1.70.0040.00417.36
8.1.60.0040.00417.46
8.1.50.0030.00517.55
8.1.40.0000.00817.52
8.1.30.0050.00517.62
8.1.20.0070.00017.53
8.1.10.0050.00217.56
8.1.00.0000.00817.56
8.0.300.0070.00018.77
8.0.290.0000.00816.75
8.0.280.0020.00518.54
8.0.270.0030.00317.24
8.0.260.0030.00517.23
8.0.250.0030.00316.98
8.0.240.0030.00317.02
8.0.230.0040.00417.00
8.0.220.0030.00316.95
8.0.210.0040.00416.85
8.0.200.0030.00316.86
8.0.190.0000.00916.86
8.0.180.0050.00316.86
8.0.170.0080.00017.02
8.0.160.0050.00316.93
8.0.150.0050.00316.73
8.0.140.0000.00816.80
8.0.130.0030.00313.35
8.0.120.0050.00316.81
8.0.110.0000.00716.97
8.0.100.0000.00716.88
8.0.90.0000.00816.83
8.0.80.0120.00316.88
8.0.70.0070.00016.89
8.0.60.0040.00416.94
8.0.50.0000.00716.98
8.0.30.0100.01217.25
8.0.20.0040.01417.40
8.0.10.0050.00217.05
8.0.00.0070.01016.77
7.4.330.0040.00015.00
7.4.320.0030.00316.45
7.4.300.0000.00616.50
7.4.290.0070.00016.51
7.4.280.0000.01016.45
7.4.270.0060.00016.39
7.4.260.0070.00016.56
7.4.250.0030.00316.36
7.4.240.0040.00416.46
7.4.230.0070.00016.39
7.4.220.0060.01116.59
7.4.210.0100.01016.52
7.4.200.0000.00716.45
7.4.160.0200.00416.50
7.4.150.0040.01517.40
7.4.140.0070.01017.86
7.4.130.0190.00416.68
7.4.120.0120.00916.64
7.4.110.0090.00916.46
7.4.100.0070.01016.54
7.4.90.0070.01016.59
7.4.80.0050.01119.39
7.4.70.0100.00716.67
7.4.60.0090.00616.59
7.4.50.0040.00416.48
7.4.40.0100.00716.66
7.4.30.0080.00816.52
7.4.00.0030.00915.15
7.3.330.0000.00613.32
7.3.320.0000.00513.33
7.3.310.0000.00816.24
7.3.300.0030.00316.34
7.3.290.0120.00316.43
7.3.280.0060.00916.38
7.3.270.0180.00017.40
7.3.260.0100.00716.60
7.3.240.0100.00716.28
7.3.230.0060.01016.39
7.3.210.0060.01016.47
7.3.200.0130.00619.39
7.3.190.0100.00716.56
7.3.180.0110.00616.38
7.3.170.0100.01016.48
7.3.160.0060.00916.57
7.3.120.0060.01015.11
7.3.110.0000.01114.73
7.3.100.0140.00014.71
7.3.90.0000.01114.98
7.3.80.0030.00614.88
7.3.70.0060.01015.03
7.3.60.0030.01014.61
7.3.50.0000.01414.74
7.3.40.0050.00514.67
7.3.30.0100.00314.94
7.3.20.0030.01016.80
7.3.10.0030.01316.83
7.3.00.0110.00016.39
7.2.330.0080.00816.36
7.2.320.0090.00916.73
7.2.310.0060.01816.62
7.2.300.0100.00716.42
7.2.290.0090.01416.57
7.2.240.0110.00014.94
7.2.230.0000.01615.18
7.2.220.0070.01014.66
7.2.210.0070.01014.58
7.2.200.0030.01014.95
7.2.190.0030.01314.89
7.2.180.0100.00314.94
7.2.170.0000.01414.72
7.2.160.0040.01415.21
7.2.150.0070.00716.84
7.2.140.0000.01016.75
7.2.130.0140.00017.10
7.2.120.0070.00416.81
7.2.110.0000.01417.01
7.2.100.0070.01317.05
7.2.90.0000.01516.78
7.2.80.0040.01216.81
7.2.70.0060.00317.09
7.2.60.0080.00416.73
7.2.50.0000.01716.80
7.2.40.0000.01416.96
7.2.30.0040.00816.90
7.2.20.0060.01116.84
7.2.10.0080.00816.94
7.2.00.0030.01016.96
7.1.330.0030.01015.60
7.1.320.0030.01216.01
7.1.310.0040.00415.80
7.1.300.0030.00615.88
7.1.290.0080.00815.81
7.1.280.0100.00315.59
7.1.270.0000.01115.82
7.1.260.0000.01315.77
7.1.250.0040.01115.88
7.1.70.0110.00016.92
7.1.60.0040.01919.32
7.1.50.0040.01116.84
7.1.00.0100.06722.37
7.0.200.0230.00515.06
7.0.140.0030.07722.00
7.0.60.0100.08019.91
7.0.50.0030.05317.66
7.0.40.0030.09020.12
7.0.30.0400.05320.18
7.0.20.0400.07020.02
7.0.10.0200.06720.00
7.0.00.0130.06720.03
5.6.280.0000.07721.06
5.6.210.0070.08020.54
5.6.200.0030.05318.23
5.6.190.0100.07020.57
5.6.180.0070.08320.56
5.6.170.0200.05320.54
5.6.160.0030.04020.61
5.6.150.0100.07718.22
5.6.140.0000.06018.15
5.6.130.0030.05718.21
5.6.120.0070.04320.97
5.6.110.0030.04321.00
5.6.100.0030.08721.03
5.6.90.0100.08320.96
5.6.80.0200.06020.28
5.6.70.0100.03020.39
5.5.350.0130.05320.31
5.5.340.0130.04318.01
5.5.330.0100.07720.41
5.5.320.0100.08020.32
5.5.310.0330.07320.30
5.5.300.0100.05318.02
5.5.290.0070.06717.91
5.5.280.0130.08020.74
5.5.270.0130.06320.85
5.5.260.0270.06020.63
5.5.250.0130.05020.65
5.5.240.0130.04720.15
5.4.450.0800.06319.48
5.4.440.0830.06019.45
5.4.430.0900.07019.10
5.4.420.0630.00019.46
5.4.410.0630.00019.57
5.4.400.0670.00019.00
5.4.390.0600.00019.26
5.4.380.0670.00018.97
5.4.370.0630.00018.96
5.4.360.0600.00019.09
5.4.350.0630.00018.97
5.4.340.0040.03611.97
5.4.320.0090.03412.45
5.4.310.0050.03912.45
5.4.300.0060.03612.45
5.4.290.0050.03812.45
5.4.280.0040.03612.34
5.4.270.0050.03712.34
5.4.260.0040.03912.35
5.4.250.0080.03512.34
5.4.240.0060.03512.35
5.4.230.0080.03512.34
5.4.220.0040.03712.34
5.4.210.0070.04112.34
5.4.200.0030.04512.34
5.4.190.0050.03512.33
5.4.180.0070.03412.33
5.4.170.0050.04612.34
5.4.160.0060.03412.34
5.4.150.0060.03512.34
5.4.140.0070.04012.02
5.4.130.0050.03512.01
5.4.120.0040.03711.96
5.4.110.0070.03411.96
5.4.100.0060.03411.96
5.4.90.0040.04011.96
5.4.80.0070.03511.96
5.4.70.0060.03411.96
5.4.60.0080.03211.96
5.4.50.0050.03611.96
5.4.40.0050.03511.95
5.4.30.0070.03411.95
5.4.20.0070.03411.95
5.4.10.0030.03711.95
5.4.00.0050.03611.43
5.3.290.0060.03812.80
5.3.280.0040.03812.71
5.3.270.0050.04612.73
5.3.260.0060.03812.72
5.3.250.0060.03612.72
5.3.240.0120.03712.72
5.3.230.0080.03512.70
5.3.220.0100.03212.68
5.3.210.0090.03512.68
5.3.200.0070.03312.68
5.3.190.0080.03412.68
5.3.180.0070.03412.67
5.3.170.0080.03412.67
5.3.160.0050.03712.67
5.3.150.0060.03512.67
5.3.140.0080.03612.66
5.3.130.0050.04012.66
5.3.120.0070.03712.66
5.3.110.0030.04012.66
5.3.100.0060.03712.12
5.3.90.0040.03712.08
5.3.80.0040.03612.07
5.3.70.0050.03612.07
5.3.60.0060.03512.06
5.3.50.0050.03512.00
5.3.40.0050.03612.00
5.3.30.0050.03411.94
5.3.20.0030.03711.72
5.3.10.0070.03211.69
5.3.00.0030.03811.67
5.2.170.0050.0299.18
5.2.160.0040.0309.18
5.2.150.0050.0329.18
5.2.140.0050.0299.18
5.2.130.0030.0309.13
5.2.120.0080.0249.13
5.2.110.0010.0329.14
5.2.100.0030.0309.13
5.2.90.0040.0299.14
5.2.80.0020.0349.13
5.2.70.0060.0289.14
5.2.60.0060.0289.09
5.2.50.0060.0289.05
5.2.40.0040.0329.03
5.2.30.0050.0289.01
5.2.20.0030.0349.00
5.2.10.0050.0358.93
5.2.00.0030.0298.79
5.1.60.0020.0258.07
5.1.50.0050.0238.07
5.1.40.0050.0228.05
5.1.30.0040.0258.41
5.1.20.0090.0218.43
5.1.10.0040.0258.15
5.1.00.0050.0248.15
5.0.50.0040.0266.63
5.0.40.0030.0196.48
5.0.30.0020.0316.30
5.0.20.0020.0206.27
5.0.10.0010.0216.25
5.0.00.0010.0326.24
4.4.90.0040.0134.78
4.4.80.0030.0144.75
4.4.70.0020.0164.76
4.4.60.0010.0164.76
4.4.50.0040.0134.77
4.4.40.0040.0234.71
4.4.30.0020.0164.76
4.4.20.0020.0164.85
4.4.10.0010.0174.85
4.4.00.0030.0244.75
4.3.110.0030.0154.67
4.3.100.0020.0154.66
4.3.90.0030.0144.63
4.3.80.0030.0244.59
4.3.70.0030.0154.63
4.3.60.0010.0174.62
4.3.50.0020.0164.63
4.3.40.0020.0244.54
4.3.30.0020.0163.30
4.3.20.0030.0153.27
4.3.10.0030.0193.23
4.3.00.0300.0207.43

preferences:
41.43 ms | 401 KiB | 5 Q