3v4l.org

run code in 300+ PHP versions simultaneously
<?php $b = "hello"; $x = array(); $x[0] =& $b; $x[1] =& $b; $y = unserialize(serialize($x)); $y[0] = 'world'; $x[0] = 'world'; var_dump($x); var_dump($y);

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)
8.3.60.0090.00616.75
8.3.50.0100.01217.39
8.3.40.0000.01418.50
8.3.30.0110.00418.79
8.3.20.0000.00818.75
8.3.10.0040.00420.53
8.3.00.0040.00417.50
8.2.180.0140.00716.75
8.2.170.0110.00422.96
8.2.160.0160.00019.00
8.2.150.0050.00324.18
8.2.140.0080.00024.66
8.2.130.0090.00626.16
8.2.120.0040.00419.77
8.2.110.0060.00322.16
8.2.100.0080.00417.65
8.2.90.0000.00917.75
8.2.80.0040.00417.97
8.2.70.0050.00318.04
8.2.60.0050.00317.93
8.2.50.0050.00318.10
8.2.40.0000.00720.30
8.2.30.0000.00918.05
8.2.20.0000.00817.65
8.2.10.0040.00417.78
8.2.00.0050.00217.78
8.1.280.0100.00725.92
8.1.270.0070.00024.66
8.1.260.0060.00326.35
8.1.250.0070.01428.09
8.1.240.0050.00522.46
8.1.230.0040.00719.09
8.1.220.0000.00917.74
8.1.210.0040.00420.92
8.1.200.0040.00417.25
8.1.190.0000.00817.35
8.1.180.0000.00918.10
8.1.170.0030.00718.52
8.1.160.0050.00218.78
8.1.150.0080.00018.57
8.1.140.0000.00717.32
8.1.130.0050.00217.82
8.1.120.0000.00717.39
8.1.110.0070.00017.25
8.1.100.0040.00317.21
8.1.90.0000.00717.27
8.1.80.0000.00717.39
8.1.70.0030.00317.38
8.1.60.0030.00517.54
8.1.50.0000.00717.41
8.1.40.0050.00217.44
8.1.30.0000.00717.48
8.1.20.0050.00317.65
8.1.10.0000.00717.56
8.1.00.0040.00417.49
8.0.300.0080.00020.16
8.0.290.0040.00416.63
8.0.280.0000.00818.38
8.0.270.0040.00417.21
8.0.260.0000.00716.67
8.0.250.0000.00816.96
8.0.240.0040.00416.91
8.0.230.0070.00016.85
8.0.220.0070.00016.93
8.0.210.0070.00016.93
8.0.200.0030.00316.82
8.0.190.0040.00416.94
8.0.180.0040.00416.84
8.0.170.0060.00316.80
8.0.160.0040.00416.81
8.0.150.0000.00816.84
8.0.140.0040.00416.83
8.0.130.0000.00513.30
8.0.120.0080.00016.74
8.0.110.0030.00316.75
8.0.100.0070.00016.93
8.0.90.0000.00716.74
8.0.80.0070.01116.87
8.0.70.0040.00416.93
8.0.60.0040.00416.79
8.0.50.0000.00716.75
8.0.30.0150.00317.00
8.0.20.0090.01616.92
8.0.10.0000.00716.79
8.0.00.0110.01016.72
7.4.330.0030.00312.96
7.4.320.0000.00716.34
7.4.300.0030.00316.52
7.4.290.0030.00316.42
7.4.280.0000.00916.30
7.4.270.0030.00316.45
7.4.260.0040.00413.17
7.4.250.0040.00416.54
7.4.240.0030.00316.43
7.4.230.0000.00716.57
7.4.220.0110.01116.59
7.4.210.0070.00816.50
7.4.200.0030.00316.28
7.4.190.0040.00416.62
7.4.160.0090.00616.61
7.4.150.0060.01216.45
7.4.140.0110.00716.38
7.4.130.0100.01016.37
7.4.120.0070.01116.50
7.4.110.0080.00816.37
7.4.100.0150.00616.48
7.4.90.0070.01616.48
7.4.80.0100.00816.51
7.4.70.0040.01516.21
7.4.60.0070.01016.46
7.4.50.0040.00416.48
7.4.40.0040.00716.46
7.4.30.0100.00716.68
7.4.10.0060.01214.88
7.4.00.0090.00715.05
7.3.330.0000.00613.05
7.3.320.0030.00313.09
7.3.310.0040.00416.20
7.3.300.0000.00716.26
7.3.290.0150.00616.17
7.3.280.0120.00416.16
7.3.270.0100.01316.47
7.3.260.0120.01316.53
7.3.250.0130.00816.55
7.3.240.0090.00916.36
7.3.230.0090.00916.55
7.3.210.0030.01516.18
7.3.200.0070.01419.39
7.3.190.0120.01016.44
7.3.180.0060.01016.20
7.3.170.0030.01216.40
7.3.160.0080.00816.32
7.3.130.0120.00014.97
7.3.120.0090.00714.90
7.3.110.0100.01014.80
7.3.100.0060.00914.78
7.3.90.0110.00715.00
7.3.80.0080.00414.83
7.3.70.0130.00014.53
7.3.60.0090.00614.84
7.3.50.0040.01514.37
7.3.40.0060.00314.82
7.3.30.0060.00914.48
7.3.20.0030.01216.66
7.3.10.0090.00316.65
7.3.00.0030.01016.58
7.2.330.0090.00916.71
7.2.320.0160.00616.59
7.2.310.0130.00916.57
7.2.300.0030.01316.64
7.2.290.0030.01316.81
7.2.260.0040.01514.83
7.2.250.0000.01815.14
7.2.240.0040.01115.23
7.2.230.0130.00715.08
7.2.220.0040.01215.03
7.2.210.0040.00815.16
7.2.200.0040.01114.76
7.2.190.0030.01715.13
7.2.180.0070.01115.20
7.2.170.0060.00915.13
7.2.160.0080.00515.02
7.2.150.0070.00716.85
7.2.140.0060.00617.09
7.2.130.0090.00616.84
7.2.120.0120.00017.02
7.2.110.0060.00616.89
7.2.100.0060.00316.71
7.2.90.0040.00716.98
7.2.80.0030.00917.03
7.2.70.0030.01316.96
7.2.60.0090.00316.64
7.2.50.0030.01316.88
7.2.40.0090.00917.11
7.2.30.0030.01017.06
7.2.20.0060.00316.85
7.2.10.0030.00616.77
7.2.00.0060.01017.97
7.1.330.0100.00315.92
7.1.320.0070.00715.55
7.1.310.0080.00515.79
7.1.300.0030.01215.64
7.1.290.0030.01315.89
7.1.280.0120.00315.71
7.1.270.0030.01015.91
7.1.260.0030.00915.62
7.1.250.0000.00915.55
7.1.240.0000.01715.42
7.1.230.0060.00615.62
7.1.220.0040.00815.57
7.1.210.0030.00915.66
7.1.200.0070.00715.78
7.1.190.0090.00315.86
7.1.180.0070.00715.88
7.1.170.0070.01315.67
7.1.160.0090.00915.90
7.1.150.0000.01415.75
7.1.140.0080.00815.96
7.1.130.0030.01015.91
7.1.120.0070.00715.85
7.1.110.0110.00315.95
7.1.100.0050.01017.02
7.1.90.0090.00615.75
7.1.80.0100.00715.64
7.1.70.0050.00716.49
7.1.60.0050.01217.45
7.1.50.0050.01416.23
7.1.40.0070.00715.86
7.1.30.0110.00315.68
7.1.20.0030.00715.69
7.1.10.0000.01515.80
7.1.00.0030.03119.09
7.0.330.0070.00315.12
7.0.320.0080.00815.21
7.0.310.0030.00915.54
7.0.300.0030.01515.50
7.0.290.0080.00815.27
7.0.280.0060.00815.48
7.0.270.0030.00715.45
7.0.260.0030.00515.29
7.0.250.0100.00315.54
7.0.240.0090.00615.42
7.0.230.0070.01015.37
7.0.220.0040.00715.42
7.0.210.0060.00615.27
7.0.200.0100.00815.00
7.0.190.0070.00715.33
7.0.180.0080.00415.25
7.0.170.0000.01115.45
7.0.160.0060.00615.58
7.0.150.0060.00315.46
7.0.140.0050.04218.77
7.0.130.0060.00615.20
7.0.120.0050.03918.86
7.0.110.0110.00415.51
7.0.100.0060.00615.51
7.0.90.0060.00915.50
7.0.80.0100.00315.39
7.0.70.0040.01115.50
7.0.60.0070.03817.60
7.0.50.0070.04416.62
7.0.40.0030.03216.84
7.0.30.0110.02616.84
7.0.20.0150.05116.82
7.0.10.0070.02216.86
7.0.00.0070.04316.88
5.6.400.0040.00914.49
5.6.390.0040.00414.05
5.6.380.0030.01013.86
5.6.370.0040.01114.45
5.6.360.0150.00414.56
5.6.350.0040.01114.38
5.6.340.0100.00314.45
5.6.330.0050.00514.33
5.6.320.0100.00714.41
5.6.310.0090.00314.62
5.6.300.0130.00314.30
5.6.290.0100.00613.86
5.6.280.0080.03617.66
5.6.270.0080.00814.73
5.6.260.0060.00914.40
5.6.250.0070.01014.24
5.6.240.0090.00614.39
5.6.230.0000.00914.10
5.6.220.0000.01414.25
5.6.210.0030.04517.63
5.6.200.0100.04016.27
5.6.190.0090.02217.42
5.6.180.0120.02817.42
5.6.170.0180.04017.37
5.6.160.0020.02517.22
5.6.150.0100.04216.29
5.6.140.0110.02016.34
5.6.130.0080.03116.29
5.6.120.0030.04917.57
5.6.110.0100.01817.83
5.6.100.0100.03817.71
5.6.90.0080.02317.62
5.6.80.0070.03717.40
5.6.70.0070.00714.61
5.6.60.0100.00014.31
5.6.50.0100.00314.08
5.6.40.0090.00314.31
5.6.30.0090.00314.20
5.6.20.0020.01614.02
5.6.10.0070.00713.99
5.6.00.0000.01014.45
5.5.380.0000.01314.20
5.5.370.0060.00614.18
5.5.360.0090.00614.42
5.5.350.0150.03717.25
5.5.340.0050.04016.10
5.5.330.0040.02517.42
5.5.320.0180.03317.19
5.5.310.0200.04217.19
5.5.300.0080.04216.24
5.5.290.0050.02116.09
5.5.280.0100.02317.67
5.5.270.0070.04517.37
5.5.260.0100.04017.61
5.5.250.0110.03717.44
5.5.240.0090.03917.06
5.5.230.0060.00914.35
5.5.220.0090.00014.35
5.5.210.0040.00814.28
5.5.200.0000.01314.36
5.5.190.0070.00714.09
5.5.180.0030.00914.05
5.5.170.0070.01014.35
5.5.160.0000.01114.07
5.5.150.0100.00314.21
5.5.140.0040.01114.32
5.5.130.0030.01314.09
5.5.120.0040.00814.34
5.5.110.0030.01014.08
5.5.100.0070.00714.12
5.5.90.0030.01314.43
5.5.80.0070.00714.45
5.5.70.0040.01214.02
5.5.60.0040.00714.43
5.5.50.0090.00614.27
5.5.40.0110.00314.24
5.5.30.0040.01114.10
5.5.20.0060.00314.32
5.5.10.0080.00313.95
5.5.00.0030.01314.22
5.4.450.0080.04215.23
5.4.440.0020.03515.22
5.4.430.0050.02315.25
5.4.420.0020.02315.17
5.4.410.0050.02015.29
5.4.400.0070.03815.12
5.4.390.0000.04615.10
5.4.380.0070.03115.12
5.4.370.0070.02715.16
5.4.360.0040.03115.14
5.4.350.0070.03915.09
5.4.340.0030.02515.01
5.4.330.0040.00411.10
5.4.320.0050.02314.94
5.4.310.0020.02615.09
5.4.300.0050.02014.94
5.4.290.0070.01715.09
5.4.280.0070.03315.14
5.4.270.0080.02115.09
5.4.260.0040.03915.12
5.4.250.0050.04015.12
5.4.240.0050.04115.13
5.4.230.0110.03614.99
5.4.220.0050.02015.09
5.4.210.0050.04215.13
5.4.200.0060.02615.08
5.4.190.0070.02015.01
5.4.180.0080.01715.14
5.4.170.0070.02115.13
5.4.160.0090.02215.18
5.4.150.0030.04315.04
5.4.140.0030.02213.67
5.4.130.0040.03213.79
5.4.120.0070.01713.75
5.4.110.0040.04213.67
5.4.100.0080.03113.69
5.4.90.0030.03913.79
5.4.80.0050.03913.72
5.4.70.0030.02413.67
5.4.60.0030.02813.66
5.4.50.0040.01913.68
5.4.40.0030.02113.66
5.4.30.0000.02613.83
5.4.20.0050.01713.72
5.4.10.0030.02113.68
5.4.00.0000.02513.45
5.3.290.0030.02412.82
5.3.280.0080.03012.81
5.3.270.0040.04012.81
5.3.260.0050.02912.90
5.3.250.0080.04012.90
5.3.240.0040.04012.79
5.3.230.0070.03712.76
5.3.220.0070.03712.79
5.3.210.0080.02312.79
5.3.200.0050.04212.79
5.3.190.0020.03812.80
5.3.180.0050.04012.79
5.3.170.0030.04012.77
5.3.160.0070.03812.78
5.3.150.0020.03812.82
5.3.140.0080.01712.79
5.3.130.0030.02012.79
5.3.120.0030.02112.78
5.3.110.0050.02012.72
5.3.100.0040.02212.61
5.3.90.0050.02112.50
5.3.80.0000.02212.54
5.3.70.0040.02412.53
5.3.60.0020.01912.54
5.3.50.0090.02012.57
5.3.40.0030.03712.49
5.3.30.0040.03312.40
5.3.20.0020.02112.37
5.3.10.0040.02112.35
5.3.00.0060.01812.34
5.2.170.0070.03011.03
5.2.160.0030.03011.03
5.2.150.0000.05011.07
5.2.140.0100.05011.00
5.2.130.0000.03311.10
5.2.120.0030.02711.04
5.2.110.0000.03011.03
5.2.100.0070.02311.19
5.2.90.0070.03011.01
5.2.80.0000.03011.00
5.2.70.0000.03011.04
5.2.60.0030.02710.89
5.2.50.0000.03010.87
5.2.40.0030.03010.93
5.2.30.0030.02711.05
5.2.20.0070.02710.78
5.2.10.0030.02710.87
5.2.00.0070.02310.71
5.1.60.0000.02310.07
5.1.50.0030.02310.02
5.1.40.0000.0279.98
5.1.30.0000.02710.37
5.1.20.0000.02710.36
5.1.10.0000.02710.14
5.1.00.0030.02310.07
5.0.50.0030.0208.52
5.0.40.0000.0208.31
5.0.30.0100.0278.24
5.0.20.0000.0208.20
5.0.10.0000.0208.12
5.0.00.0000.0308.30
4.4.90.0000.0177.88
4.4.80.0000.0177.88
4.4.70.0000.0177.88
4.4.60.0030.0137.88
4.4.50.0030.0137.88
4.4.40.0000.0277.88
4.4.30.0000.0177.88
4.4.20.0000.0177.88
4.4.10.0000.0177.88
4.4.00.0000.0237.88
4.3.110.0030.0137.88
4.3.100.0000.0277.88
4.3.90.0070.0137.88
4.3.80.0000.0237.88
4.3.70.0000.0137.88
4.3.60.0000.0177.88
4.3.50.0000.0137.88
4.3.40.0000.0237.88
4.3.30.0000.0177.88
4.3.20.0000.0137.88
4.3.10.0000.0137.88
4.3.00.0000.0137.88

preferences:
93.94 ms | 401 KiB | 5 Q