3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr1 = [1,2,3]; $arr2 = $arr1; xdebug_debug_zval('arr2'); key($arr2); xdebug_debug_zval('arr2'); unset($arr1); unset($arr2); $arr1 = [1,2,3]; $arr2 = $arr1; xdebug_debug_zval('arr2'); end($arr2); xdebug_debug_zval('arr2');

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)
8.3.40.0140.00318.71
8.3.30.0120.00318.48
8.3.20.0080.00020.16
8.3.10.0050.00323.52
8.3.00.0000.00817.50
8.2.170.0030.01322.96
8.2.160.0030.01020.38
8.2.150.0080.00024.18
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0060.00617.38
8.2.110.0030.00720.39
8.2.100.0060.00617.80
8.2.90.0040.00419.23
8.2.80.0050.00317.97
8.2.70.0040.00417.50
8.2.60.0000.00717.80
8.2.50.0050.00318.07
8.2.40.0030.00521.25
8.2.30.0040.00420.61
8.2.20.0000.00817.67
8.2.10.0050.00217.98
8.2.00.0040.00418.06
8.1.270.0080.00023.98
8.1.260.0030.00626.35
8.1.250.0000.00728.09
8.1.240.0090.00020.91
8.1.230.0110.00017.53
8.1.220.0080.00017.78
8.1.210.0040.00418.77
8.1.200.0060.00317.35
8.1.190.0000.00817.22
8.1.180.0040.00418.10
8.1.170.0040.00418.95
8.1.160.0000.00821.98
8.1.150.0040.00420.57
8.1.140.0000.00819.51
8.1.130.0070.00017.64
8.1.120.0000.00717.33
8.1.110.0000.00717.34
8.1.100.0000.00717.29
8.1.90.0040.00417.29
8.1.80.0000.00817.35
8.1.70.0030.00317.28
8.1.60.0050.00317.52
8.1.50.0050.00317.41
8.1.40.0040.00417.52
8.1.30.0000.00917.56
8.1.20.0000.00717.62
8.1.10.0030.00517.60
8.1.00.0040.00417.41
8.0.300.0040.00418.77
8.0.290.0080.00016.75
8.0.280.0000.00718.29
8.0.270.0070.00017.12
8.0.260.0060.00017.18
8.0.250.0040.00416.95
8.0.240.0070.00016.93
8.0.230.0040.00416.82
8.0.220.0070.00016.79
8.0.210.0000.00816.89
8.0.200.0000.00716.95
8.0.190.0080.00016.91
8.0.180.0070.00016.89
8.0.170.0000.00816.77
8.0.160.0000.00716.82
8.0.150.0040.00416.82
8.0.140.0040.00416.85
8.0.130.0060.00013.35
8.0.120.0000.00816.73
8.0.110.0000.00716.79
8.0.100.0070.00016.75
8.0.90.0040.00416.88
8.0.80.0030.01316.95
8.0.70.0040.00416.79
8.0.60.0000.00716.86
8.0.50.0030.00316.87
8.0.30.0130.00517.18
8.0.20.0080.00917.40
8.0.10.0040.00416.97
8.0.00.0090.00916.93
7.4.330.0030.00315.08
7.4.320.0030.00316.54
7.4.300.0060.00016.50
7.4.290.0040.00416.56
7.4.280.0030.00616.34
7.4.270.0000.00716.58
7.4.260.0070.00016.56
7.4.250.0030.00316.55
7.4.240.0030.00416.48
7.4.230.0000.00716.60
7.4.220.0090.00916.67
7.4.210.0050.01116.60
7.4.200.0040.00416.38
7.4.160.0120.00316.61
7.4.150.0090.00917.40
7.4.140.0100.00817.86
7.4.130.0140.00516.49
7.4.120.0040.01216.47
7.4.110.0090.01316.37
7.4.100.0090.00916.59
7.4.90.0140.00316.26
7.4.80.0130.00319.39
7.4.70.0120.00316.62
7.4.60.0090.00616.39
7.4.50.0000.00616.48
7.4.40.0030.01316.57
7.4.30.0090.00916.50
7.4.00.0060.00914.82
7.3.330.0030.00313.16
7.3.320.0000.00513.15
7.3.310.0030.00316.28
7.3.300.0030.00316.14
7.3.290.0000.00616.30
7.3.280.0090.00916.35
7.3.270.0100.01017.40
7.3.260.0160.00616.39
7.3.250.0100.00816.42
7.3.240.0110.00616.64
7.3.230.0120.00616.58
7.3.210.0080.00816.26
7.3.200.0080.00816.70
7.3.190.0130.00716.39
7.3.180.0060.01016.16
7.3.170.0170.00616.63
7.3.160.0060.00916.36
7.3.00.0100.00316.68
7.2.330.0120.00616.30
7.2.320.0090.00916.65
7.2.310.0100.00716.59
7.2.300.0100.00716.50
7.2.290.0090.00916.57
7.2.130.0040.00816.68
7.2.120.0060.00916.81
7.2.110.0030.01016.60
7.2.100.0110.00716.70
7.2.90.0130.00316.80
7.2.80.0040.01116.57
7.2.70.0120.00916.66
7.2.60.0060.00616.62
7.2.50.0030.01316.88
7.2.40.0090.00916.68
7.2.30.0170.00716.79
7.2.20.0030.01316.50
7.2.10.0030.01316.58
7.2.00.0050.00518.03
7.1.250.0050.00515.58
7.1.240.0130.00315.62
7.1.230.0040.01115.70
7.1.220.0030.00615.64
7.1.210.0030.00615.55
7.1.200.0030.00915.58
7.1.190.0030.00715.41
7.1.180.0080.00415.54
7.1.170.0040.00415.58
7.1.160.0100.00315.60
7.1.150.0060.00615.38
7.1.140.0000.01315.55
7.1.130.0060.00915.51
7.1.120.0120.00415.63
7.1.110.0030.01215.41
7.1.100.0020.01116.79
7.1.90.0060.00615.82
7.1.80.0090.00615.49
7.1.70.0080.00316.29
7.1.60.0090.01117.55
7.1.50.0050.00716.29
7.1.40.0000.01515.78
7.1.30.0040.00815.66
7.1.20.0100.00715.52
7.1.10.0080.00615.82
7.1.00.0080.04019.03
7.0.330.0040.00715.02
7.0.320.0000.01915.40
7.0.310.0030.01015.45
7.0.300.0070.01115.24
7.0.290.0140.00015.43
7.0.280.0190.00015.16
7.0.270.0040.00815.19
7.0.260.0040.01115.29
7.0.250.0070.00715.47
7.0.240.0070.00715.20
7.0.230.0030.01015.31
7.0.220.0130.00715.18
7.0.210.0070.00715.30
7.0.200.0120.00414.98
7.0.190.0090.00314.98
7.0.180.0080.00815.36
7.0.170.0000.01615.29
7.0.160.0000.01315.28
7.0.150.0030.00815.33
7.0.140.0040.01115.22
7.0.130.0200.00015.30
7.0.120.0060.00615.47
7.0.110.0150.00415.26
7.0.100.0080.00814.72
7.0.90.0000.01315.35
7.0.80.0030.01015.36
7.0.70.0030.00615.22
7.0.60.0100.02318.50
7.0.50.0120.04416.68
7.0.40.0050.04716.76
7.0.30.0210.04716.77
7.0.20.0180.03816.75
7.0.10.0050.03516.70
7.0.00.0170.03716.80
5.6.380.0090.00614.61
5.6.370.0100.01214.04
5.6.360.0200.00814.34
5.6.350.0100.01014.35
5.6.340.0080.00514.12
5.6.330.0040.00414.07
5.6.320.0030.01013.82
5.6.310.0060.01214.47
5.6.300.0040.01114.43
5.6.290.0050.00514.28
5.6.280.0030.04017.62
5.6.270.0070.00414.33
5.6.260.0080.00314.55
5.6.250.0070.00714.27
5.6.240.0070.00713.87
5.6.230.0030.01014.44
5.6.220.0110.00614.20
5.6.210.0080.02717.29
5.6.200.0050.05116.24
5.6.190.0050.02817.23
5.6.180.0210.02517.25
5.6.170.0170.04017.58
5.6.160.0100.02817.23
5.6.150.0170.03516.13
5.6.140.0160.02516.18
5.6.130.0070.02916.38
5.6.120.0100.04217.62
5.6.110.0090.04517.61
5.6.100.0130.04517.45
5.6.90.0080.02917.40
5.6.80.0130.01717.21
5.6.70.0140.00414.18
5.6.60.0100.00713.98
5.6.50.0080.00814.18
5.6.40.0260.00314.24
5.6.30.0170.00314.34
5.6.20.0080.01214.02
5.6.10.0030.01514.30
5.6.00.0120.00614.44
5.5.380.0060.00313.29
5.5.370.0000.01213.29
5.5.360.0000.00713.29
5.5.350.0070.03516.86
5.5.340.0090.04115.65
5.5.330.0030.03416.75
5.5.320.0220.02716.73
5.5.310.0180.03516.79
5.5.300.0140.02515.62
5.5.290.0140.04015.63
5.5.280.0090.02217.03
5.5.270.0060.04617.04
5.5.260.0140.02817.13
5.5.250.0120.03016.95
5.5.240.0100.04016.67
5.5.230.0160.00013.29
5.5.220.0110.00413.29
5.5.210.0150.00313.29
5.5.200.0060.00613.29
5.5.190.0190.00313.29
5.5.180.0140.00313.29
5.5.170.0070.01013.29
5.5.160.0070.00613.29
5.5.150.0100.00413.29
5.5.140.0170.00313.29
5.5.130.0000.01013.29
5.5.120.0040.01213.29
5.5.110.0060.00313.29
5.5.100.0080.00413.29
5.5.90.0030.00913.29
5.5.80.0060.00313.29
5.5.70.0100.00313.29
5.5.60.0040.00813.29
5.5.50.0130.00313.29
5.5.40.0080.00413.29
5.5.30.0050.00513.29
5.5.20.0110.00413.29
5.5.10.0130.00913.29
5.5.00.0080.00013.29
5.4.450.1960.02216.33
5.4.440.1560.02216.35
5.4.430.2060.02116.32
5.4.420.0090.03916.30
5.4.410.0760.02716.29
5.4.400.2040.02416.23
5.4.390.1930.02616.18
5.4.380.2030.02316.22
5.4.370.2170.02016.14
5.4.360.2120.02816.27
5.4.350.2000.01916.23
5.4.340.2010.02116.13
5.4.330.0120.00013.29
5.4.320.1830.02416.14
5.4.310.2000.02716.11
5.4.300.2180.02316.23
5.4.290.1960.02116.22
5.4.280.1950.02416.19
5.4.270.2300.02216.16
5.4.260.2100.02416.24
5.4.250.1830.02216.26
5.4.240.2020.01916.17
5.4.230.1950.02316.23
5.4.220.1830.02016.22
5.4.210.2000.02416.11
5.4.200.1880.02116.14
5.4.190.1860.02016.14
5.4.180.1600.02416.10
5.4.170.2040.01916.18
5.4.160.2010.02316.21
5.4.150.2180.02316.22
5.4.140.2030.01814.87
5.4.130.1960.02014.80
5.4.120.1920.01614.77
5.4.110.1920.02214.85
5.4.100.2080.01814.83
5.4.90.1860.02114.84
5.4.80.0000.00913.29
5.4.70.0050.00513.29
5.4.60.0070.00313.29
5.4.50.0030.00813.29
5.4.40.0080.00413.29
5.4.30.0130.00713.29
5.4.20.0030.00613.29
5.4.10.0000.01213.29
5.4.00.0060.00313.29

preferences:
53.86 ms | 400 KiB | 5 Q