3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 1; $a = null; var_dump($a); echo isset($a)? 'true' : 'false',"\n"; unset($a); var_dump($a); echo isset($a)? 'true' : 'false',"\n";

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)
8.3.60.0040.01218.52
8.3.50.0110.00821.93
8.3.40.0120.00318.78
8.3.30.0040.01118.97
8.3.20.0080.00020.16
8.3.10.0050.00321.92
8.3.00.0080.00022.34
8.2.180.0130.00316.75
8.2.170.0100.00722.96
8.2.160.0080.00820.89
8.2.150.0070.00024.18
8.2.140.0030.00524.66
8.2.130.0080.00026.16
8.2.120.0080.00019.48
8.2.110.0000.00922.32
8.2.100.0080.00419.64
8.2.90.0040.00419.21
8.2.80.0040.00419.53
8.2.70.0040.00417.63
8.2.60.0090.00317.80
8.2.50.0050.00318.07
8.2.40.0030.00718.09
8.2.30.0040.00417.93
8.2.20.0040.00417.73
8.2.10.0060.00317.68
8.2.00.0040.00417.55
8.1.280.0110.00425.92
8.1.270.0000.00822.16
8.1.260.0080.00026.35
8.1.250.0080.00028.09
8.1.240.0070.00323.81
8.1.230.0000.01119.16
8.1.220.0050.00317.76
8.1.210.0040.00418.77
8.1.200.0040.00417.21
8.1.190.0080.00017.30
8.1.180.0050.00318.10
8.1.170.0030.00618.72
8.1.160.0040.00421.85
8.1.150.0040.00418.48
8.1.140.0040.00417.45
8.1.130.0000.00717.73
8.1.120.0030.00517.32
8.1.110.0000.00717.38
8.1.100.0000.00717.39
8.1.90.0040.00417.25
8.1.80.0000.00817.43
8.1.70.0000.00717.31
8.1.60.0030.00717.46
8.1.50.0040.00417.45
8.1.40.0070.00017.41
8.1.30.0070.00017.62
8.1.20.0040.00417.45
8.1.10.0050.00217.46
8.1.00.0000.00817.48
8.0.300.0070.00018.77
8.0.290.0040.00417.15
8.0.280.0030.00518.36
8.0.270.0030.00317.12
8.0.260.0030.00316.92
8.0.250.0000.00716.91
8.0.240.0030.00316.90
8.0.230.0000.00716.98
8.0.220.0000.00716.93
8.0.210.0000.00616.88
8.0.200.0030.00316.96
8.0.190.0000.00716.98
8.0.180.0040.00716.79
8.0.170.0040.00416.89
8.0.160.0050.00216.93
8.0.150.0040.00416.84
8.0.140.0050.00216.74
8.0.130.0000.00613.33
8.0.120.0000.00816.75
8.0.110.0000.00716.70
8.0.100.0050.00316.88
8.0.90.0070.00016.93
8.0.80.0080.00816.88
8.0.70.0040.00416.80
8.0.60.0070.00016.90
8.0.50.0040.00416.71
8.0.30.0120.00917.03
8.0.20.0110.00717.40
8.0.10.0000.00716.95
8.0.00.0150.00316.73
7.4.330.0000.00515.04
7.4.320.0030.00616.57
7.4.300.0000.00616.45
7.4.290.0030.00316.53
7.4.280.0060.00016.53
7.4.270.0000.00716.54
7.4.260.0000.00816.52
7.4.250.0000.00816.45
7.4.240.0000.00716.54
7.4.230.0030.00316.31
7.4.220.0120.00616.53
7.4.210.0110.00516.48
7.4.200.0000.00716.59
7.4.190.0070.00016.33
7.4.160.0080.00816.54
7.4.150.0060.01117.40
7.4.140.0110.00617.86
7.4.130.0090.01116.43
7.4.120.0090.01016.45
7.4.110.0130.00416.50
7.4.100.0120.00916.56
7.4.90.0100.01016.53
7.4.80.0100.01019.39
7.4.70.0070.01016.43
7.4.60.0030.01316.38
7.4.50.0000.00816.53
7.4.40.0040.01122.77
7.4.30.0120.00316.43
7.4.00.0070.01015.10
7.3.330.0030.00313.13
7.3.320.0020.00213.13
7.3.310.0070.00016.12
7.3.300.0000.00716.05
7.3.290.0030.01016.20
7.3.280.0070.00916.23
7.3.270.0030.02017.40
7.3.260.0140.00716.45
7.3.250.0050.01116.31
7.3.240.0080.00816.12
7.3.230.0100.01216.39
7.3.210.0030.01316.18
7.3.200.0030.01719.39
7.3.190.0100.01316.37
7.3.180.0120.00316.20
7.3.170.0120.00516.37
7.3.160.0100.00716.36
7.3.120.0030.01014.93
7.2.330.0090.00916.63
7.2.320.0110.01416.53
7.2.310.0130.01016.69
7.2.300.0040.01216.45
7.2.290.0130.00316.51
7.2.00.0070.00718.97
7.1.100.0000.01217.71
7.1.70.0040.00717.23
7.1.60.0140.01019.82
7.1.50.0130.01016.63
7.1.00.0000.08022.36
7.0.200.0000.01016.78
7.0.140.0030.07321.95
7.0.100.0370.03319.91
7.0.90.0230.05319.92
7.0.80.0330.08019.89
7.0.70.0370.07719.93
7.0.60.0270.08719.95
7.0.50.0330.08020.31
7.0.40.0100.07720.07
7.0.30.0100.07320.11
7.0.20.0070.05020.07
7.0.10.0070.08020.04
7.0.00.0030.09020.14
5.6.280.0000.07721.06
5.6.250.0070.07720.53
5.6.240.0200.07320.69
5.6.230.0070.07320.62
5.6.220.0100.08020.48
5.6.210.0030.08020.73
5.6.200.0070.08321.17
5.6.190.0070.07021.00
5.6.180.0070.08020.95
5.6.170.0100.07721.10
5.6.160.0070.08321.02
5.6.150.0070.08021.00
5.6.140.0130.08021.04
5.6.130.0170.07021.02
5.6.120.0130.08321.08
5.6.110.0170.08321.04
5.6.100.0100.07720.97
5.6.90.0130.04321.08
5.6.80.0100.06320.44
5.6.70.0100.07720.42
5.6.60.0100.04320.30
5.6.50.0170.06720.55
5.6.40.0100.07020.30
5.6.30.0070.07320.30
5.6.20.0100.07320.40
5.6.10.0100.04720.39
5.6.00.0170.06320.34
5.5.380.0170.07320.31
5.5.370.0130.08020.37
5.5.360.0130.08020.43
5.5.350.0070.04320.48
5.5.340.0030.08720.88
5.5.330.0070.07320.81
5.5.320.0030.07020.88
5.5.310.0030.08320.93
5.5.300.0030.07720.82
5.5.290.0130.07320.91
5.5.280.0100.07320.88
5.5.270.0170.07320.79
5.5.260.0000.09020.74
5.5.250.0130.07320.71
5.5.240.0130.06720.27
5.5.230.0030.08320.30
5.5.220.0070.08020.14
5.5.210.0070.08320.14
5.5.200.0030.08020.27
5.5.190.0070.07020.14
5.5.180.0130.07020.26
5.5.160.0070.07720.17
5.5.150.0100.07319.98
5.5.140.0200.06320.20
5.5.130.0070.08319.98
5.5.120.0100.07020.06
5.5.110.0070.08020.17
5.5.100.0070.04720.07
5.5.90.0170.06320.06
5.5.80.0030.06320.06
5.5.70.0170.06720.05
5.5.60.0030.08019.95
5.5.50.0100.07020.08
5.5.40.0000.08319.89
5.5.30.0130.07320.03
5.5.20.0070.04720.13
5.5.10.0070.07319.97
5.5.00.0070.08019.97
5.4.450.0130.07019.57
5.4.440.0030.05019.47
5.4.430.0100.07319.44
5.4.420.0100.06319.45
5.4.410.0100.07019.27
5.4.400.0030.08318.90
5.4.390.0030.07719.04
5.4.380.0100.06019.13
5.4.370.0170.06318.82
5.4.360.0070.07718.81
5.4.350.0070.04718.98
5.4.340.0070.05018.94
5.4.320.0100.06319.06
5.4.310.0100.06719.04
5.4.300.0100.07319.02
5.4.290.0100.04019.04
5.4.280.0030.07718.97
5.4.270.0030.08019.22
5.4.260.0100.07019.12
5.4.250.0030.07719.11
5.4.240.0100.06719.09
5.4.230.0100.07019.04
5.4.220.0070.04718.79
5.4.210.0100.07719.06
5.4.200.0100.04319.06
5.4.190.0070.07319.11
5.4.180.0070.07019.09
5.4.170.0100.07318.80
5.4.160.0000.08018.92
5.4.150.0170.06019.00
5.4.140.0070.07716.27
5.4.130.0100.06716.26
5.4.120.0130.06316.14
5.4.110.0100.07016.43
5.4.100.0100.06016.45
5.4.90.0100.04716.36
5.4.80.0030.06716.37
5.4.70.0000.03716.35
5.4.60.0000.03716.24
5.4.50.0000.03716.40
5.4.40.0070.03316.29
5.4.30.0030.03716.33
5.4.20.0030.03316.19
5.4.10.0030.04016.27
5.4.00.0000.03715.75
5.3.290.0030.04714.65
5.3.280.0000.07714.43
5.3.270.0100.04314.46
5.3.260.0100.06714.46
5.3.250.0170.06314.54
5.3.240.0070.07314.61
5.3.230.0130.07314.53
5.3.220.0070.04314.42
5.3.210.0070.08014.54
5.3.200.0170.07014.53
5.3.190.0070.07714.55
5.3.180.0070.07714.55
5.3.170.0070.03714.56
5.3.160.0030.05314.38
5.3.150.0130.02714.56
5.3.140.0030.04014.39
5.3.130.0030.03714.54
5.3.120.0000.05314.52
5.3.110.0000.04714.55
5.3.100.0000.03714.04
5.3.90.0070.03314.01
5.3.80.0070.05013.79
5.3.70.0070.03314.02
5.3.60.0000.04014.01
5.3.50.0030.03313.93
5.3.40.0000.04013.90
5.3.30.0100.04313.89
5.3.20.0030.06313.47
5.3.10.0100.04713.56
5.3.00.0070.03713.63
5.2.170.0030.02711.14
5.2.160.0030.04011.18
5.2.150.0000.03010.97
5.2.140.0000.04011.14
5.2.130.0070.03711.06
5.2.120.0000.06311.14
5.2.110.0000.03011.17
5.2.100.0100.02011.17
5.2.90.0000.03010.89
5.2.80.0100.05011.08
5.2.70.0030.02710.92
5.2.60.0030.03010.96
5.2.50.0030.03711.05
5.2.40.0030.02710.96
5.2.30.0070.02310.96
5.2.20.0000.03010.95
5.2.10.0000.03310.88
5.2.00.0000.03010.62
5.1.60.0000.02710.02
5.1.50.0070.03310.04
5.1.40.0030.0239.99
5.1.30.0000.02710.30
5.1.20.0000.03010.41
5.1.10.0000.0339.94
5.1.00.0030.02310.07
5.0.50.0070.0178.56
5.0.40.0030.0178.39
5.0.30.0030.0338.31
5.0.20.0000.0208.31
5.0.10.0000.0208.31
5.0.00.0030.0338.31
4.4.90.0030.0138.31
4.4.80.0030.0138.31
4.4.70.0000.0178.31
4.4.60.0000.0178.31
4.4.50.0000.0178.31
4.4.40.0000.0338.31
4.4.30.0000.0178.31
4.4.20.0000.0178.31
4.4.10.0070.0208.31
4.4.00.0000.0278.31
4.3.110.0000.0208.31
4.3.100.0000.0178.31
4.3.90.0100.0078.31
4.3.80.0000.0278.31
4.3.70.0030.0138.31
4.3.60.0000.0178.31
4.3.50.0030.0138.31
4.3.40.0000.0238.31
4.3.30.0030.0138.31
4.3.20.0000.0178.31
4.3.10.0000.0178.31
4.3.00.0030.0138.31

preferences:
40.77 ms | 401 KiB | 5 Q