3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = null; # $y is not set var_dump($x); var_dump($y); var_dump(isset($x)); var_dump(isset($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)
8.3.40.0070.00718.77
8.3.30.0130.00318.92
8.3.20.0040.00420.21
8.3.10.0040.00423.48
8.3.00.0080.00018.95
8.2.170.0150.00022.96
8.2.160.0070.00720.38
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0030.01426.16
8.2.120.0050.00319.38
8.2.110.0040.00422.13
8.2.100.0070.00417.84
8.2.90.0000.00919.23
8.2.80.0000.00817.97
8.2.70.0040.00417.50
8.2.60.0030.00717.92
8.2.50.0050.00318.07
8.2.40.0060.00319.95
8.2.30.0000.00718.17
8.2.20.0000.00717.68
8.2.10.0000.00717.94
8.2.00.0030.00617.54
8.1.270.0090.00023.80
8.1.260.0070.00026.35
8.1.250.0040.00428.09
8.1.240.0000.00823.91
8.1.230.0110.00019.05
8.1.220.0040.00417.74
8.1.210.0030.00518.77
8.1.200.0060.00317.23
8.1.190.0050.00317.22
8.1.180.0000.00818.10
8.1.170.0050.00318.64
8.1.160.0030.00321.91
8.1.150.0070.00018.56
8.1.140.0000.00717.28
8.1.130.0030.00619.64
8.1.120.0070.00017.27
8.1.110.0050.00317.37
8.1.100.0000.00717.39
8.1.90.0070.00017.27
8.1.80.0000.00717.42
8.1.70.0030.00317.33
8.1.60.0000.00817.53
8.1.50.0030.00617.41
8.1.40.0030.00617.44
8.1.30.0040.00417.40
8.1.20.0040.00417.55
8.1.10.0000.00717.43
8.1.00.0070.00017.34
8.0.300.0000.00919.21
8.0.290.0000.00716.63
8.0.280.0000.00718.36
8.0.270.0030.00317.05
8.0.260.0060.00017.19
8.0.250.0000.00716.81
8.0.240.0000.00716.84
8.0.230.0000.00716.80
8.0.220.0000.00716.93
8.0.210.0030.00316.75
8.0.200.0060.00017.00
8.0.190.0040.00416.82
8.0.180.0000.00716.92
8.0.170.0050.00316.93
8.0.160.0070.00016.90
8.0.150.0000.00716.73
8.0.140.0030.00716.82
8.0.130.0000.00513.38
8.0.120.0070.00016.82
8.0.110.0040.00416.80
8.0.100.0030.00516.67
8.0.90.0000.00716.94
8.0.80.0090.01216.89
8.0.70.0040.00416.68
8.0.60.0000.00716.91
8.0.50.0040.00416.83
8.0.30.0090.00917.01
8.0.20.0090.00917.40
8.0.10.0070.00016.84
8.0.00.0070.01016.59
7.4.330.0000.00615.01
7.4.320.0060.00016.55
7.4.300.0000.00616.39
7.4.290.0000.00716.41
7.4.280.0000.00716.43
7.4.270.0050.00216.42
7.4.260.0040.00316.33
7.4.250.0070.00016.40
7.4.240.0030.00316.44
7.4.230.0030.00316.56
7.4.220.0100.00716.37
7.4.210.0110.00316.50
7.4.200.0070.00016.50
7.4.160.0140.00316.45
7.4.150.0180.00317.40
7.4.140.0070.01317.86
7.4.130.0100.01116.46
7.4.120.0130.00416.29
7.4.110.0100.00716.41
7.4.100.0040.01416.36
7.4.90.0080.01316.30
7.4.80.0060.01219.39
7.4.70.0090.00616.22
7.4.60.0090.00616.46
7.4.50.0000.00816.37
7.4.40.0120.00616.41
7.4.30.0110.00616.43
7.4.00.0080.00614.78
7.3.330.0060.00013.06
7.3.320.0000.00512.98
7.3.310.0030.00316.18
7.3.300.0000.00716.00
7.3.290.0100.00716.13
7.3.280.0100.00616.17
7.3.270.0070.01017.40
7.3.260.0100.00616.37
7.3.250.0150.00816.21
7.3.240.0080.00816.21
7.3.230.0100.00716.40
7.3.210.0080.00816.30
7.3.200.0180.00419.39
7.3.190.0100.01016.26
7.3.180.0040.01216.27
7.3.170.0080.01516.34
7.3.160.0090.00916.41
7.3.120.0090.00814.79
7.3.110.0070.01014.59
7.3.100.0060.01014.70
7.3.90.0000.01514.61
7.3.80.0130.00714.65
7.3.70.0030.00714.53
7.3.60.0060.00314.65
7.3.50.0060.00614.60
7.3.40.0060.00614.73
7.3.30.0050.00814.59
7.3.20.0040.00716.60
7.3.10.0110.00416.31
7.3.00.0120.00616.45
7.2.330.0150.00316.21
7.2.320.0100.00616.34
7.2.310.0120.00616.53
7.2.300.0090.01216.21
7.2.290.0070.01016.61
7.2.250.0070.01314.70
7.2.240.0070.01014.60
7.2.230.0040.01114.93
7.2.220.0030.01014.59
7.2.210.0030.01714.84
7.2.200.0070.01014.78
7.2.190.0070.01014.84
7.2.180.0110.00414.78
7.2.170.0040.01114.77
7.2.160.0040.00414.66
7.2.150.0040.01116.67
7.2.140.0040.01116.60
7.2.130.0060.01016.41
7.2.120.0100.00516.41
7.2.110.0100.00616.42
7.2.100.0040.01316.33
7.2.90.0090.01016.33
7.2.80.0150.00616.65
7.2.70.0130.00516.55
7.2.60.0130.01116.65
7.2.50.0090.00716.68
7.2.40.0060.01016.65
7.2.30.0120.00416.83
7.2.20.0090.00716.54
7.2.10.0120.00516.65
7.2.00.0090.00517.47
7.1.330.0000.01515.70
7.1.320.0000.02015.74
7.1.310.0070.00315.71
7.1.300.0030.00615.49
7.1.290.0080.00415.78
7.1.280.0090.00615.88
7.1.270.0000.01115.60
7.1.260.0060.01015.46
7.1.250.0120.00515.37
7.1.240.0100.00715.43
7.1.230.0030.00615.80
7.1.220.0070.00715.79
7.1.210.0080.00615.50
7.1.200.0140.00015.78
7.1.190.0000.01515.83
7.1.180.0080.00815.69
7.1.170.0060.00615.77
7.1.160.0110.00315.65
7.1.150.0040.00415.63
7.1.140.0070.00715.68
7.1.130.0000.01415.80
7.1.120.0030.01015.68
7.1.110.0080.00015.75
7.1.100.0140.00915.85
7.1.90.0070.00715.52
7.1.80.0050.00315.72
7.1.70.0060.00616.50
7.1.60.0090.00817.70
7.1.50.0110.00825.13
7.1.40.0070.00715.68
7.1.30.0040.00415.50
7.1.20.0080.00415.52
7.1.10.0030.01015.43
7.1.00.0030.04218.99
7.0.330.0060.01015.12
7.0.320.0000.01415.04
7.0.310.0100.00715.04
7.0.300.0030.00915.46
7.0.290.0110.00715.16
7.0.280.0000.01015.31
7.0.270.0060.00315.14
7.0.260.0000.01115.42
7.0.250.0040.00415.21
7.0.240.0000.00715.51
7.0.230.0000.00815.48
7.0.220.0000.00815.26
7.0.210.0070.00715.15
7.0.200.0020.00815.91
7.0.190.0040.00815.14
7.0.180.0030.01015.26
7.0.170.0000.01315.08
7.0.160.0060.00315.41
7.0.150.0000.01315.35
7.0.140.0020.04018.81
7.0.130.0080.00815.03
7.0.120.0070.00715.24
7.0.110.0070.00715.47
7.0.100.0070.04417.50
7.0.90.0050.02317.57
7.0.80.0090.04017.51
7.0.70.0080.02617.65
7.0.60.0070.03917.47
7.0.50.0130.04217.95
7.0.40.0070.04516.60
7.0.30.0090.04416.76
7.0.20.0070.04016.69
7.0.10.0030.02616.61
7.0.00.0030.03916.82
5.6.400.0060.00614.18
5.6.390.0150.00014.13
5.6.380.0060.00314.28
5.6.370.0030.01314.32
5.6.360.0030.00914.00
5.6.350.0070.01114.04
5.6.340.0040.01114.11
5.6.330.0050.00514.06
5.6.320.0000.00914.42
5.6.310.0060.00914.30
5.6.300.0030.01114.06
5.6.290.0060.00914.05
5.6.280.0080.03817.79
5.6.270.0060.00914.07
5.6.260.0030.01013.99
5.6.250.0030.04217.37
5.6.240.0120.04017.30
5.6.230.0030.05217.38
5.6.220.0060.03817.35
5.6.210.0080.04217.30
5.6.200.0100.03817.54
5.6.190.0140.02717.55
5.6.180.0050.04417.65
5.6.170.0100.04017.59
5.6.160.0080.04117.47
5.6.150.0070.03817.56
5.6.140.0080.04317.54
5.6.130.0070.04317.54
5.6.120.0100.04017.55
5.6.110.0020.04817.75
5.6.100.0050.05117.55
5.6.90.0080.04017.52
5.6.80.0090.03717.18
5.6.70.0150.03317.14
5.6.60.0030.04117.38
5.6.50.0020.04717.30
5.6.40.0090.02817.32
5.6.30.0080.03717.29
5.6.20.0120.04017.18
5.6.10.0020.03117.19
5.6.00.0120.03717.22
5.5.380.0030.04317.23
5.5.370.0030.04517.26
5.5.360.0020.03017.38
5.5.350.0120.02417.28
5.5.340.0070.03117.48
5.5.330.0080.04117.44
5.5.320.0060.02517.54
5.5.310.0100.03817.32
5.5.300.0080.04317.53
5.5.290.0020.04217.47
5.5.280.0050.05017.54
5.5.270.0030.02817.36
5.5.260.0090.04317.20
5.5.250.0000.04117.36
5.5.240.0030.03517.13
5.5.230.0090.04017.16
5.5.220.0050.03916.97
5.5.210.0080.04017.11
5.5.200.0140.03216.91
5.5.190.0120.03917.04
5.5.180.0000.04217.12
5.5.170.0090.00313.78
5.5.160.0050.03617.17
5.5.150.0040.02917.15
5.5.140.0140.03016.89
5.5.130.0070.04417.16
5.5.120.0030.03417.03
5.5.110.0080.02217.11
5.5.100.0070.02516.85
5.5.90.0030.02517.01
5.5.80.0060.02116.99
5.5.70.0040.02316.85
5.5.60.0030.02917.10
5.5.50.0050.02317.00
5.5.40.0090.01816.93
5.5.30.0020.02716.95
5.5.20.0030.02117.06
5.5.10.0080.01816.85
5.5.00.0030.02717.06
5.4.450.0050.03714.96
5.4.440.0030.04715.11
5.4.430.0060.02014.99
5.4.420.0120.03515.23
5.4.410.0020.04215.16
5.4.400.0030.03714.80
5.4.390.0050.04014.95
5.4.380.0070.02514.91
5.4.370.0050.03314.96
5.4.360.0080.03014.88
5.4.350.0060.04014.81
5.4.340.0030.02714.90
5.4.330.0030.00710.83
5.4.320.0080.02315.06
5.4.310.0100.03414.95
5.4.300.0050.04114.74
5.4.290.0100.01815.13
5.4.280.0020.03114.99
5.4.270.0030.02614.83
5.4.260.0020.02314.94
5.4.250.0050.02014.92
5.4.240.0050.02214.88
5.4.230.0000.02514.82
5.4.220.0050.02214.87
5.4.210.0050.02214.89
5.4.200.0030.02214.91
5.4.190.0070.02214.91
5.4.180.0030.02014.87
5.4.170.0030.02514.74
5.4.160.0050.02414.89
5.4.150.0020.02414.90
5.4.140.0060.02013.47
5.4.130.0050.01913.58
5.4.120.0060.02213.67
5.4.110.0050.02013.36
5.4.100.0040.02013.62
5.4.90.0030.02013.50
5.4.80.0090.01313.55
5.4.70.0030.02413.68
5.4.60.0020.02213.52
5.4.50.0030.02013.50
5.4.40.0030.01613.52
5.4.30.0030.02213.58
5.4.20.0070.01813.62
5.4.10.0000.02213.61
5.4.00.0030.01913.37
5.3.290.0070.02512.47
5.3.280.0060.02012.48
5.3.270.0020.03512.50
5.3.260.0070.01912.40
5.3.250.0060.01812.50
5.3.240.0010.02112.50
5.3.230.0020.02412.43
5.3.220.0050.01912.43
5.3.210.0050.01912.44
5.3.200.0030.02112.38
5.3.190.0030.02112.47
5.3.180.0050.02012.45
5.3.170.0000.02412.49
5.3.160.0000.01912.58
5.3.150.0080.01512.45
5.3.140.0030.02312.29
5.3.130.0030.02412.36
5.3.120.0020.02012.32
5.3.110.0030.02212.54
5.3.100.0020.01912.20
5.3.90.0060.01812.20
5.3.80.0020.01812.08
5.3.70.0050.02111.96
5.3.60.0030.01812.16
5.3.50.0030.01912.02
5.3.40.0030.01612.01
5.3.30.0030.02011.96
5.3.20.0070.01511.92
5.3.10.0060.01911.79
5.3.00.0040.01911.73
5.2.170.0030.02311.13
5.2.160.0000.03011.14
5.2.150.0070.02310.99
5.2.140.0030.02711.19
5.2.130.0000.02711.15
5.2.120.0000.02710.91
5.2.110.0070.03710.89
5.2.100.0030.03710.89
5.2.90.0070.02011.02
5.2.80.0000.03011.01
5.2.70.0100.02011.14
5.2.60.0070.05711.08
5.2.50.0030.05711.00
5.2.40.0000.02710.86
5.2.30.0030.06710.79
5.2.20.0100.02311.02
5.2.10.0030.04010.91
5.2.00.0070.05310.64
5.1.60.0130.0479.98
5.1.50.0000.0239.82
5.1.40.0070.0509.96
5.1.30.0000.05710.26
5.1.20.0170.04310.36
5.1.10.0030.02710.05
5.1.00.0070.04310.07
5.0.50.0070.0208.38
5.0.40.0030.0338.42
5.0.30.0070.0608.30
5.0.20.0000.0408.30
5.0.10.0030.0308.30
5.0.00.0030.0378.30
4.4.90.0070.0308.30
4.4.80.0030.0108.30
4.4.70.0000.0178.30
4.4.60.0000.0208.30
4.4.50.0030.0308.30
4.4.40.0030.0208.30
4.4.30.0000.0338.30
4.4.20.0000.0208.30
4.4.10.0030.0338.30
4.4.00.0030.0438.30
4.3.110.0070.0278.30
4.3.100.0030.0238.30
4.3.90.0000.0308.30
4.3.80.0030.0238.30
4.3.70.0030.0278.30
4.3.60.0070.0178.30
4.3.50.0000.0378.30
4.3.40.0000.0538.30
4.3.30.0000.0238.30
4.3.20.0000.0278.30
4.3.10.0000.0208.30
4.3.00.0000.0178.30

preferences:
36 ms | 400 KiB | 5 Q