3v4l.org

run code in 300+ PHP versions simultaneously
<?php class test implements JsonSerializable { public $a = 2; public function JsonSerialize() { return array('b' => 2, 'test'=>$this); } } var_dump(json_encode(new test())); var_dump(json_last_error_msg());

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)
8.3.40.0070.01118.67
8.3.30.0100.00318.82
8.3.20.0080.00020.15
8.3.10.0040.00423.66
8.3.00.0090.00017.50
8.2.170.0070.01022.96
8.2.160.0100.00320.34
8.2.150.0000.00724.18
8.2.140.0000.00824.66
8.2.130.0030.00526.16
8.2.120.0030.00620.82
8.2.110.0060.00322.15
8.2.100.0040.00717.91
8.2.90.0000.00719.05
8.2.80.0040.00417.97
8.2.70.0030.00617.63
8.2.60.0000.00818.04
8.2.50.0000.00818.07
8.2.40.0080.00018.16
8.2.30.0030.00518.11
8.2.20.0030.00617.73
8.2.10.0050.00318.05
8.2.00.0000.00817.79
8.1.270.0090.00023.78
8.1.260.0050.00226.35
8.1.250.0110.00428.09
8.1.240.0060.00323.96
8.1.230.0030.00819.07
8.1.220.0030.00617.80
8.1.210.0000.00818.77
8.1.200.0040.00717.36
8.1.190.0080.00017.35
8.1.180.0000.00818.10
8.1.170.0120.00018.50
8.1.160.0070.00021.99
8.1.150.0000.00918.81
8.1.140.0060.00317.34
8.1.130.0070.00017.86
8.1.120.0000.00817.41
8.1.110.0040.00417.33
8.1.100.0040.00417.48
8.1.90.0000.00717.41
8.1.80.0000.00717.44
8.1.70.0000.00717.40
8.1.60.0000.00917.55
8.1.50.0030.00517.34
8.1.40.0050.00317.48
8.1.30.0030.00517.61
8.1.20.0040.00417.55
8.1.10.0060.00317.31
8.1.00.0030.00617.36
8.0.300.0070.00018.77
8.0.290.0070.00016.75
8.0.280.0000.00718.42
8.0.270.0030.00317.25
8.0.260.0040.00417.25
8.0.250.0030.00316.88
8.0.240.0060.00016.93
8.0.230.0070.00016.87
8.0.220.0000.00816.81
8.0.210.0030.00316.79
8.0.200.0000.00616.88
8.0.190.0040.00416.92
8.0.180.0040.00416.73
8.0.170.0060.00316.77
8.0.160.0000.00716.82
8.0.150.0080.00316.68
8.0.140.0030.00516.73
8.0.130.0000.00613.22
8.0.120.0040.00416.80
8.0.110.0070.00016.68
8.0.100.0030.00516.83
8.0.90.0000.00716.61
8.0.80.0030.01816.79
8.0.70.0070.00016.85
8.0.60.0050.00316.84
8.0.50.0070.00016.65
8.0.30.0120.00616.98
8.0.20.0150.00517.40
8.0.10.0000.00816.79
8.0.00.0060.01516.71
7.4.330.0030.00315.03
7.4.320.0000.00616.57
7.4.300.0020.00516.41
7.4.290.0080.00016.37
7.4.280.0050.00316.42
7.4.270.0040.00416.47
7.4.260.0050.00516.50
7.4.250.0040.00416.47
7.4.240.0030.00316.49
7.4.230.0070.00016.60
7.4.220.0080.01016.56
7.4.210.0100.01316.54
7.4.200.0030.00316.26
7.4.160.0040.01116.45
7.4.150.0070.01017.40
7.4.140.0110.00717.86
7.4.130.0200.00416.40
7.4.120.0090.00716.42
7.4.110.0090.00616.56
7.4.100.0100.01316.45
7.4.90.0060.01816.41
7.4.80.0040.01219.39
7.4.70.0100.00616.47
7.4.60.0090.01216.24
7.4.50.0000.00816.46
7.4.40.0130.00316.45
7.4.30.0060.01516.40
7.4.00.0030.01014.76
7.3.330.0030.00313.16
7.3.320.0000.00513.16
7.3.310.0030.00316.28
7.3.300.0000.00616.21
7.3.290.0000.01416.30
7.3.280.0080.00816.26
7.3.270.0040.01417.40
7.3.260.0300.02016.34
7.3.240.0160.00716.25
7.3.230.0070.01016.39
7.3.210.0130.00316.54
7.3.200.0120.01019.39
7.3.190.0110.00716.27
7.3.180.0130.00316.43
7.3.170.0110.00516.49
7.3.160.0120.00316.35
7.3.120.0090.00617.15
7.3.110.0090.00617.15
7.3.100.0030.01017.15
7.3.90.0030.01017.15
7.3.80.0030.00917.15
7.3.70.0060.01017.15
7.3.60.0090.00617.15
7.3.50.0090.00617.15
7.3.40.0000.01617.15
7.3.30.0030.01417.15
7.3.20.0030.01417.15
7.3.10.0030.01317.15
7.3.00.0060.00917.15
7.2.330.0070.01116.56
7.2.320.0030.01616.35
7.2.310.0060.00916.62
7.2.300.0150.00416.39
7.2.290.0030.01216.62
7.2.240.0000.01417.15
7.2.230.0030.01017.15
7.2.220.0060.00917.15
7.2.210.0100.00317.15
7.2.200.0060.00917.15
7.2.190.0060.00917.15
7.2.180.0090.00317.15
7.2.170.0030.00917.15
7.2.160.0040.00717.15
7.2.150.0110.00417.15
7.2.140.0120.00317.15
7.2.130.0050.00517.15
7.2.120.0080.00817.15
7.2.110.0030.01017.15
7.2.100.0040.01117.15
7.2.90.0000.01617.15
7.2.80.0000.01317.15
7.2.70.0040.01117.15
7.2.60.0050.01116.95
7.2.50.0120.00617.00
7.2.40.0110.00717.15
7.2.30.0100.00617.15
7.2.20.0000.01217.15
7.2.10.0070.00717.15
7.2.00.0070.01017.15
7.1.330.0080.00817.15
7.1.320.0070.00717.15
7.1.310.0090.00617.15
7.1.300.0060.00917.15
7.1.290.0040.01217.15
7.1.280.0000.01517.15
7.1.270.0070.00717.15
7.1.260.0000.00817.15
7.1.250.0090.00617.15
7.1.200.0140.00915.37
7.1.70.0030.01016.92
7.1.60.0060.01919.40
7.1.50.0100.01016.90
7.1.00.0000.08022.40
7.0.200.0170.00714.52
7.0.140.0030.07321.95
7.0.90.0400.09319.85
7.0.80.0470.05319.99
7.0.70.0630.07319.95
7.0.60.0570.08719.91
7.0.50.0570.04320.33
7.0.40.0030.06320.05
7.0.30.0070.08020.09
7.0.20.0130.08020.19
7.0.10.0170.07319.99
7.0.00.0000.08720.07
5.6.280.0100.06720.86
5.6.240.0100.07720.69
5.6.230.0070.05020.69
5.6.220.0100.07320.59
5.6.210.0030.08020.47
5.6.200.0170.07721.04
5.6.190.0070.04321.01
5.6.180.0070.08021.08
5.6.170.0030.09021.04
5.6.160.0130.08021.14
5.6.150.0130.07321.14
5.6.140.0070.06020.93
5.6.130.0170.07721.02
5.6.120.0030.08321.01
5.6.110.0070.06320.96
5.6.100.0070.04721.04
5.6.90.0070.04321.00
5.6.80.0070.05320.32
5.6.70.0200.07020.41
5.6.60.0100.07720.46
5.6.50.0030.07720.34
5.6.40.0100.07020.39
5.6.30.0130.07320.41
5.6.20.0130.07020.32
5.6.10.0100.07720.43
5.6.00.0100.08020.42
5.5.380.0170.07020.35
5.5.370.0100.08320.38
5.5.360.0030.06020.43
5.5.350.0100.07720.45
5.5.340.0100.08320.80
5.5.330.0100.08020.84
5.5.320.0000.05320.84
5.5.310.0170.04020.63
5.5.300.0030.04720.90
5.5.290.0070.08720.91
5.5.280.0000.08720.87
5.5.270.0170.07320.79
5.5.260.0070.04720.63
5.5.250.0030.08320.68
5.5.240.0070.04320.12
5.5.230.0130.07020.25
5.5.220.0030.08020.26
5.5.210.0070.07720.21
5.5.200.0000.08020.15
5.5.190.0030.08320.21
5.5.180.0070.07720.16
5.5.160.0070.08020.20
5.5.150.0100.06720.22
5.5.140.0070.05020.23
5.5.130.0130.04320.25
5.5.120.0030.05720.23
5.5.110.0100.07320.20
5.5.100.0130.04020.17
5.5.90.0100.07720.15
5.5.80.0100.04320.07
5.5.70.0100.07320.04
5.5.60.0130.04020.12
5.5.50.0000.07720.10
5.5.40.0000.05720.06
5.5.30.0030.05720.07
5.5.20.0070.05020.04
5.5.10.0000.07320.10
5.5.00.0070.07720.05
5.4.450.0000.05719.41
5.4.440.0100.04319.27
5.4.430.0070.05319.36
5.4.420.0070.04719.36
5.4.410.0030.05319.10
5.4.400.0100.07319.03
5.4.390.0070.08319.18
5.4.380.0030.07318.91
5.4.370.0070.07719.15
5.4.360.0100.07318.87
5.4.350.0130.05019.16
5.4.340.0130.07019.16
5.4.320.0100.07019.23
5.4.310.0000.08019.18
5.4.300.0130.07319.16
5.4.290.0130.04018.94
5.4.280.0100.07319.03
5.4.270.0000.08018.92
5.4.260.0200.06719.17
5.4.250.0130.06719.22
5.4.240.0130.07319.13
5.4.230.0170.05718.84
5.4.220.0030.04318.84
5.4.210.0000.05319.13
5.4.200.0130.06018.87
5.4.190.0030.05718.89
5.4.180.0130.07319.18
5.4.170.0130.07719.24
5.4.160.0070.05318.85
5.4.150.0030.06319.18
5.4.140.0070.07716.37
5.4.130.0070.07316.29
5.4.120.0030.06716.29
5.4.110.0070.07716.46
5.4.100.0100.07716.53
5.4.90.0030.04716.35
5.4.80.0030.04716.33
5.4.70.0000.04716.26
5.4.60.0000.04016.41
5.4.50.0030.07016.36
5.4.40.0130.06716.49
5.4.30.0030.05333.16
5.4.20.0200.06733.05
5.4.10.0170.08333.21
5.4.00.0200.04732.39
5.3.290.0070.07314.77
5.3.280.0130.07714.70
5.3.270.0130.07014.69
5.3.260.0030.07314.74
5.3.250.0070.04014.61
5.3.240.0030.05014.50
5.3.230.0070.04714.65
5.3.220.0170.06014.63
5.3.210.0130.07714.66
5.3.200.0070.05014.59
5.3.190.0100.03714.69
5.3.180.0100.06014.66
5.3.170.0030.05014.51
5.3.160.0030.07014.69
5.3.150.0070.06314.66
5.3.140.0070.04314.51
5.3.130.0000.07314.50
5.3.120.0130.04014.46
5.3.110.0070.04714.56
5.3.100.0100.06714.10
5.3.90.0070.04313.94
5.3.80.0070.04014.08
5.3.70.0030.05013.92
5.3.60.0070.05314.06
5.3.50.0170.03013.95
5.3.40.0070.03313.88
5.3.30.0070.05013.88
5.3.20.0070.04013.68
5.3.10.0070.04013.58
5.3.00.0070.07313.56
5.2.170.0000.05711.04
5.2.160.0000.04011.14
5.2.150.0030.04311.21
5.2.140.0030.06011.17
5.2.130.0130.03011.13
5.2.120.0100.05011.11
5.2.110.0070.02711.04
5.2.100.0070.03011.19
5.2.90.0030.04011.20
5.2.80.0030.04311.00
5.2.70.0030.05711.08
5.2.60.0000.06311.10
5.2.50.0030.05311.14
5.2.40.0000.04011.09
5.2.30.0030.03011.04
5.2.20.0030.06011.07
5.2.10.0030.03310.95
5.2.00.0030.04310.73
5.1.60.0130.04310.06
5.1.50.0030.0539.98
5.1.40.0070.0539.81
5.1.30.0130.02710.20
5.1.20.0000.05710.44
5.1.10.0000.03310.06
5.1.00.0070.0509.91
5.0.50.0070.0338.57
5.0.40.0070.0238.24
5.0.30.0070.0578.28
5.0.20.0000.0278.31
5.0.10.0030.0238.26
5.0.00.0100.0578.00
4.4.90.0030.0377.60
4.4.80.0030.0237.60
4.4.70.0000.0207.60
4.4.60.0030.0237.60
4.4.50.0030.0277.60
4.4.40.0000.0537.60
4.4.30.0000.0237.60
4.4.20.0100.0337.60
4.4.10.0030.0377.60
4.4.00.0030.0537.60
4.3.110.0070.0137.60
4.3.100.0000.0377.60
4.3.90.0030.0277.60
4.3.80.0000.0437.60
4.3.70.0000.0237.60
4.3.60.0000.0207.60
4.3.50.0030.0207.60
4.3.40.0000.0437.60
4.3.30.0030.0207.60
4.3.20.0030.0177.60
4.3.10.0030.0337.60
4.3.00.0030.0207.60

preferences:
45.48 ms | 400 KiB | 5 Q