3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array1 = array(0, 1); $array2 = array(&$array1); ob_start(function($str) use(&$array1) { static $i = 0; if ($i++ == 4) { unset($array1[0]); //unset($array1[1]); } return "$i: $str"; }, 1); var_dump($array2);

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)
8.3.40.0070.01118.84
8.3.30.0000.01419.27
8.3.20.0000.00820.34
8.3.10.0000.00823.48
8.3.00.0060.00319.38
8.2.170.0120.00622.96
8.2.160.0130.00020.52
8.2.150.0070.00024.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0070.00019.83
8.2.110.0090.00022.31
8.2.100.0110.00017.84
8.2.90.0040.00419.17
8.2.80.0080.00018.03
8.2.70.0130.00017.50
8.2.60.0000.00818.04
8.2.50.0090.00018.07
8.2.40.0030.00618.34
8.2.30.0050.00618.13
8.2.20.0040.00417.68
8.2.10.0040.00419.82
8.2.00.0040.00417.75
8.1.270.0120.00422.11
8.1.260.0080.00026.35
8.1.250.0000.00728.09
8.1.240.0090.00023.79
8.1.230.0110.00019.15
8.1.220.0040.00417.74
8.1.210.0000.00818.77
8.1.200.0090.00017.36
8.1.190.0080.00017.51
8.1.180.0090.00018.10
8.1.170.0040.00418.66
8.1.160.0040.00422.02
8.1.150.0070.00418.67
8.1.140.0040.00417.50
8.1.130.0000.00817.88
8.1.120.0000.00717.31
8.1.110.0000.00717.37
8.1.100.0000.00817.38
8.1.90.0040.00417.51
8.1.80.0040.00417.45
8.1.70.0050.00217.40
8.1.60.0000.00917.62
8.1.50.0000.00917.42
8.1.40.0050.00317.49
8.1.30.0040.00417.62
8.1.20.0000.00817.63
8.1.10.0050.00317.52
8.1.00.0090.00017.43
8.0.300.0000.00718.77
8.0.290.0000.00817.30
8.0.280.0050.00318.55
8.0.270.0000.00817.25
8.0.260.0000.00716.73
8.0.250.0000.00616.88
8.0.240.0000.00716.94
8.0.230.0000.00816.97
8.0.220.0030.00316.84
8.0.210.0060.00316.78
8.0.200.0000.00816.90
8.0.190.0060.00316.91
8.0.180.0040.00416.95
8.0.170.0070.00016.88
8.0.160.0000.00716.86
8.0.150.0040.00316.70
8.0.140.0070.00016.91
8.0.130.0050.00013.31
8.0.120.0080.00016.82
8.0.110.0040.00416.74
8.0.100.0060.00316.77
8.0.90.0000.00716.79
8.0.80.0090.00616.90
8.0.70.0000.00816.91
8.0.60.0050.00216.91
8.0.50.0000.00716.74
8.0.30.0110.01417.14
8.0.20.0070.01417.40
8.0.10.0000.00816.92
8.0.00.0050.01216.78
7.4.330.0000.00515.00
7.4.320.0060.00016.55
7.4.300.0000.00616.46
7.4.290.0030.00316.43
7.4.280.0030.00616.52
7.4.270.0000.00716.61
7.4.260.0030.00716.63
7.4.250.0040.00416.55
7.4.240.0030.00316.44
7.4.230.0060.00016.55
7.4.220.0030.01416.68
7.4.210.0050.00916.59
7.4.200.0000.00716.48
7.4.190.0000.00716.50
7.4.160.0130.00316.69
7.4.150.0110.00617.40
7.4.140.0080.01217.86
7.4.130.0120.00516.55
7.4.120.0120.00816.36
7.4.110.0110.00616.68
7.4.100.0060.01316.36
7.4.90.0140.00716.30
7.4.80.0060.01219.39
7.4.70.0060.01116.46
7.4.60.0060.01116.31
7.4.50.0000.00716.64
7.4.40.0090.00922.77
7.4.30.0090.00616.55
7.4.00.0130.00614.97
7.3.330.0030.00313.23
7.3.320.0030.00313.38
7.3.310.0000.00716.40
7.3.300.0030.00316.38
7.3.290.0110.00416.34
7.3.280.0070.01016.37
7.3.270.0100.00717.40
7.3.260.0030.01316.62
7.3.250.0090.01016.38
7.3.240.0030.01416.25
7.3.230.0140.00616.39
7.3.210.0110.00716.31
7.3.200.0100.01319.39
7.3.190.0110.01116.54
7.3.180.0000.01516.63
7.3.170.0070.01516.56
7.3.160.0070.01016.53
7.3.120.0040.01214.77
7.3.110.0060.00914.98
7.3.100.0120.00314.80
7.3.90.0040.01514.93
7.3.80.0030.00614.62
7.3.70.0140.00014.55
7.3.60.0030.00714.73
7.3.50.0040.01214.59
7.3.40.0060.01314.44
7.3.30.0160.00014.90
7.3.20.0030.00916.57
7.3.10.0030.01316.36
7.3.00.0080.00816.69
7.2.330.0030.01516.72
7.2.320.0000.01816.79
7.2.310.0030.01816.85
7.2.300.0120.00816.75
7.2.290.0060.01216.34
7.2.250.0180.00414.99
7.2.240.0040.01614.94
7.2.230.0030.00914.95
7.2.220.0070.00715.09
7.2.210.0110.00314.80
7.2.200.0060.00615.14
7.2.190.0000.01315.01
7.2.180.0070.01314.95
7.2.170.0100.00315.15
7.2.60.0090.00316.73
7.2.00.0000.01319.33
7.1.330.0070.00715.66
7.1.320.0090.00315.90
7.1.310.0030.00715.65
7.1.300.0040.00815.71
7.1.290.0040.01115.80
7.1.280.0120.00315.97
7.1.270.0060.00915.73
7.1.260.0090.00615.66
7.1.200.0060.00615.57
7.1.100.0040.00818.25
7.1.70.0040.00417.09
7.1.60.0210.00419.33
7.1.50.0090.00917.14
7.1.00.0000.08022.53
7.0.200.0100.00316.77
7.0.140.0000.07722.00
7.0.60.0100.08719.93
7.0.50.0030.05017.90
7.0.40.0200.07719.96
7.0.30.0230.04720.11
7.0.20.0370.03320.05
7.0.10.0070.09020.06
7.0.00.0170.04320.16
5.6.280.0070.07021.13
5.6.210.0030.04320.73
5.6.200.0100.07018.23
5.6.190.0100.04020.39
5.6.180.0200.04320.63
5.6.170.0300.06020.46
5.6.160.0170.06720.55
5.6.150.0200.06718.19
5.6.140.0030.06718.18
5.6.130.0070.08718.19
5.6.120.0000.09021.09
5.6.110.0100.08320.88
5.6.100.0000.09021.04
5.6.90.0070.04021.03
5.6.80.0170.05720.53
5.5.350.0300.04720.30
5.5.340.0030.04017.97
5.5.330.0100.04720.57
5.5.320.0230.04020.36
5.5.310.0370.06720.41
5.5.300.0000.04317.95
5.5.290.0070.08317.98
5.5.280.0030.07320.85
5.5.270.0070.08320.87
5.5.260.0100.08720.73
5.5.250.0070.04020.68
5.5.240.0030.08020.19
5.4.450.0670.03319.42
5.4.440.0700.03319.32
5.4.430.0030.03319.45
5.4.420.0330.04719.48
5.4.410.1170.03719.33
5.4.400.0530.03318.89
5.4.390.0800.03719.01
5.4.380.0300.05018.58
5.4.370.0200.06318.63
5.4.360.0370.04718.80
5.4.350.0330.06018.85
5.4.340.0430.04718.71
5.4.320.0060.03612.51
5.4.310.0090.03512.50
5.4.300.0020.04012.50
5.4.290.0060.05412.49
5.4.280.0070.03512.39
5.4.270.0080.03312.40
5.4.260.0060.03912.39
5.4.250.0050.03712.39
5.4.240.0090.03312.39
5.4.230.0040.04012.39
5.4.220.0020.04012.39
5.4.210.0030.03812.39
5.4.200.0180.04212.37
5.4.190.0150.04312.36
5.4.180.0170.04512.36
5.4.170.0140.04612.38
5.4.160.0130.04612.36
5.4.150.0240.07012.37
5.4.140.0180.04612.05
5.4.130.0170.04612.04
5.4.120.0210.03611.99
5.4.110.0110.04611.98
5.4.100.0170.04111.99
5.4.90.0210.03811.99
5.4.80.0320.08911.99
5.4.70.0170.04111.98
5.4.60.0130.04411.98
5.4.50.0140.04411.99
5.4.40.0190.03911.97
5.4.30.0150.04411.97
5.4.20.0340.05411.97
5.4.10.0140.04311.97
5.4.00.0170.03911.46
5.3.290.0050.03912.80
5.3.280.0080.03612.71
5.3.270.0370.06212.73
5.3.260.0180.04912.72
5.3.250.0150.04812.71
5.3.240.0160.04912.72
5.3.230.0230.04512.71
5.3.220.0300.09412.68
5.3.210.0160.04812.68
5.3.200.0150.04612.68
5.3.190.0170.04912.68
5.3.180.0150.04612.68
5.3.170.0150.04712.66
5.3.160.0220.06812.68
5.3.150.0170.04312.68
5.3.140.0160.04612.66
5.3.130.0190.04212.66
5.3.120.0210.03912.66
5.3.110.0130.04912.66
5.3.100.0270.06412.12
5.3.90.0160.04412.08
5.3.80.0190.04212.07
5.3.70.0280.09312.07
5.3.60.0160.04412.06
5.3.50.0140.04612.01
5.3.40.0180.04312.00
5.3.30.0180.04111.97
5.3.20.0180.04011.74
5.3.10.0210.03911.71
5.3.00.0250.06611.69
5.2.170.0110.0379.16
5.2.160.0180.0319.16
5.2.150.0160.0339.16
5.2.140.0160.0399.16
5.2.130.0170.0329.12
5.2.120.0070.0419.12
5.2.110.0290.0589.13
5.2.100.0110.0369.13
5.2.90.0190.0279.12
5.2.80.0100.0389.11
5.2.70.0270.0559.11
5.2.60.0150.0359.06
5.2.50.0170.0339.04
5.2.40.0110.0419.02
5.2.30.0160.0318.99
5.2.20.0140.0378.98
5.2.10.0100.0408.90
5.2.00.0300.0518.76
5.1.60.0160.0298.05
5.1.50.0140.0308.05
5.1.40.0140.0288.03
5.1.30.0200.0348.37
5.1.20.0140.0338.40
5.1.10.0380.0698.13
5.1.00.0130.0328.12
5.0.50.0080.0276.60
5.0.40.0090.0246.46
5.0.30.0100.0426.28
5.0.20.0110.0256.24
5.0.10.0110.0246.22
5.0.00.0070.0436.21
4.4.90.0110.0184.78
4.4.80.0100.0174.75
4.4.70.0180.0714.76
4.4.60.0080.0184.75
4.4.50.0080.0174.77
4.4.40.0110.0264.71
4.4.30.0070.0194.76
4.4.20.0090.0164.84
4.4.10.0070.0194.85
4.4.00.0050.0304.76
4.3.110.0100.0174.67
4.3.100.0060.0204.66
4.3.90.0080.0164.63
4.3.80.0080.0284.58
4.3.70.0090.0154.63
4.3.60.0050.0204.63
4.3.50.0070.0204.63
4.3.40.0230.0744.54
4.3.30.0080.0183.29
4.3.20.0030.0203.27
4.3.10.0060.0173.23
4.3.00.0000.01715.64

preferences:
43.22 ms | 400 KiB | 5 Q