3v4l.org

run code in 300+ PHP versions simultaneously
<?php class SerializableObject implements JsonSerializable { public function jsonSerialize() { return array('foo' => 'bar'); } } class MultipleNonCircularReference implements JsonSerializable { public function jsonSerialize() { $obj = new SerializableObject(); return array('a' => $obj, 'b' => $obj, 'c' => array('d' => $obj)); } } var_dump(json_encode(new SerializableObject()));

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)
8.3.40.0160.00618.71
8.3.30.0100.00318.92
8.3.20.0080.00020.16
8.3.10.0070.00023.66
8.3.00.0040.00417.59
8.2.170.0070.00722.96
8.2.160.0070.00720.39
8.2.150.0070.00024.18
8.2.140.0040.00424.66
8.2.130.0050.00226.16
8.2.120.0040.00421.03
8.2.110.0090.00022.16
8.2.100.0060.00619.63
8.2.90.0070.00019.22
8.2.80.0040.00417.97
8.2.70.0000.00917.50
8.2.60.0050.00217.80
8.2.50.0030.00618.07
8.2.40.0000.00817.90
8.2.30.0040.00418.05
8.2.20.0040.00417.75
8.2.10.0040.00418.12
8.2.00.0040.00417.65
8.1.270.0000.00924.01
8.1.260.0000.00826.35
8.1.250.0070.00028.09
8.1.240.0030.00723.98
8.1.230.0080.00319.02
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0060.00517.00
8.1.190.0000.00917.35
8.1.180.0060.00318.10
8.1.170.0060.00318.59
8.1.160.0070.00021.94
8.1.150.0040.00418.74
8.1.140.0100.00017.37
8.1.130.0000.00717.66
8.1.120.0040.00317.46
8.1.110.0040.00417.35
8.1.100.0030.00517.37
8.1.90.0030.00617.42
8.1.80.0000.00717.27
8.1.70.0040.00417.43
8.1.60.0060.00317.40
8.1.50.0050.00317.34
8.1.40.0030.00517.36
8.1.30.0050.00317.62
8.1.20.0030.00517.54
8.1.10.0050.00217.50
8.1.00.0040.00417.36
8.0.300.0070.00018.77
8.0.290.0040.00416.75
8.0.280.0000.00818.50
8.0.270.0000.00817.16
8.0.260.0070.00017.25
8.0.250.0030.00316.95
8.0.240.0070.00016.92
8.0.230.0070.00016.80
8.0.220.0000.00716.86
8.0.210.0000.00716.79
8.0.200.0030.00316.78
8.0.190.0040.00416.88
8.0.180.0040.00416.89
8.0.170.0080.00016.88
8.0.160.0070.00016.77
8.0.150.0000.00716.81
8.0.140.0040.00316.82
8.0.130.0000.00613.23
8.0.120.0080.00016.81
8.0.110.0040.00416.79
8.0.100.0040.00416.69
8.0.90.0000.00716.69
8.0.80.0120.00916.85
8.0.70.0060.00316.87
8.0.60.0070.00016.71
8.0.50.0040.00416.81
8.0.30.0140.00617.04
8.0.20.0090.01117.40
8.0.10.0040.00416.99
8.0.00.0150.00216.74
7.4.330.0000.00515.13
7.4.320.0030.00316.39
7.4.300.0000.00616.47
7.4.290.0070.00016.38
7.4.280.0000.00716.42
7.4.270.0030.00316.54
7.4.260.0020.00516.48
7.4.250.0040.00416.51
7.4.240.0000.00716.42
7.4.230.0030.00516.52
7.4.220.0090.01016.64
7.4.210.0030.01016.50
7.4.200.0040.00416.53
7.4.160.0070.01116.35
7.4.150.0030.01417.40
7.4.140.0090.00717.86
7.4.130.0130.00316.60
7.4.120.0080.01216.44
7.4.110.0120.00316.35
7.4.100.0060.01216.33
7.4.90.0130.00416.42
7.4.80.0130.01319.39
7.4.70.0200.00016.39
7.4.60.0090.00916.38
7.4.50.0030.00616.60
7.4.40.0070.01516.21
7.4.30.0160.00016.58
7.4.00.0080.01115.01
7.3.330.0000.00713.16
7.3.320.0030.00313.11
7.3.310.0030.00316.19
7.3.300.0000.00616.27
7.3.290.0030.01316.21
7.3.280.0070.01016.20
7.3.270.0070.01017.40
7.3.260.0030.01416.61
7.3.250.0110.00616.45
7.3.240.0110.00616.19
7.3.230.0090.00916.39
7.3.210.0030.01316.25
7.3.200.0140.00419.39
7.3.190.0090.01316.37
7.3.180.0100.00716.55
7.3.170.0060.01116.30
7.3.160.0060.00916.34
7.3.120.0060.01114.71
7.3.110.0080.00514.84
7.3.100.0050.00914.79
7.3.90.0090.00514.80
7.3.80.0090.00414.80
7.3.70.0050.00914.61
7.3.60.0060.00714.87
7.3.50.0060.00514.78
7.3.40.0040.00814.65
7.3.30.0060.00514.76
7.3.20.0040.00916.22
7.3.10.0070.00416.54
7.3.00.0050.00816.48
7.2.330.0120.00616.42
7.2.320.0140.00316.50
7.2.310.0130.00416.46
7.2.300.0060.01016.34
7.2.290.0130.00316.59
7.2.250.0080.01014.95
7.2.240.0080.01114.97
7.2.230.0070.00714.91
7.2.220.0040.00714.96
7.2.210.0050.00814.79
7.2.200.0060.00414.97
7.2.190.0050.00914.92
7.2.180.0080.00314.92
7.2.170.0030.00914.83
7.2.160.0060.00714.85
7.2.150.0050.01116.85
7.2.140.0090.00516.62
7.2.130.0060.00616.61
7.2.120.0080.00516.86
7.2.110.0040.01116.76
7.2.100.0040.01116.71
7.2.90.0050.01116.70
7.2.80.0030.01316.73
7.2.70.0050.00916.73
7.2.60.0060.01116.64
7.2.50.0090.00716.82
7.2.40.0080.00516.73
7.2.30.0080.00916.74
7.2.20.0060.00616.88
7.2.10.0070.00716.65
7.2.00.0100.00416.57
7.1.330.0080.00615.81
7.1.320.0040.00815.64
7.1.310.0030.01115.67
7.1.300.0050.00415.54
7.1.290.0070.00615.60
7.1.280.0050.00915.61
7.1.270.0040.00815.44
7.1.260.0070.00715.64
7.1.250.0050.00815.73
7.1.100.0060.00618.07
7.1.70.0030.00317.10
7.1.60.0090.01219.40
7.1.50.0090.01216.89
7.1.00.0000.07322.48
7.0.200.0040.01116.63
7.0.140.0000.07722.08
7.0.90.0530.05019.96
7.0.80.0600.08019.88
7.0.70.0700.07720.13
7.0.60.0330.04319.97
7.0.50.0500.05020.36
7.0.40.0130.04020.13
7.0.30.0070.09020.14
7.0.20.0130.08020.13
7.0.10.0100.06320.13
7.0.00.0070.09319.95
5.6.280.0030.07021.08
5.6.240.0030.05020.73
5.6.230.0000.08720.63
5.6.220.0070.06320.65
5.6.210.0070.06720.44
5.6.200.0000.05721.03
5.6.190.0100.04721.04
5.6.180.0100.08721.04
5.6.170.0030.09321.09
5.6.160.0130.07320.94
5.6.150.0030.08021.05
5.6.140.0130.04321.05
5.6.130.0130.07321.00
5.6.120.0100.05321.00
5.6.110.0170.08021.04
5.6.100.0130.07721.02
5.6.90.0070.04721.02
5.6.80.0070.08020.47
5.6.70.0130.06320.55
5.6.60.0100.08020.45
5.6.50.0070.07720.46
5.6.40.0000.08320.32
5.6.30.0070.04720.39
5.6.20.0070.08020.43
5.6.10.0130.07020.46
5.6.00.0030.08320.42
5.5.380.0070.07720.43
5.5.370.0070.08320.36
5.5.360.0000.04720.33
5.5.350.0070.04020.45
5.5.340.0070.07320.64
5.5.330.0130.07020.92
5.5.320.0070.07720.89
5.5.310.0030.08020.81
5.5.300.0100.08020.89
5.5.290.0070.10320.73
5.5.280.0070.07720.64
5.5.270.0070.06020.64
5.5.260.0100.09020.85
5.5.250.0070.04020.73
5.5.240.0100.07720.03
5.5.230.0100.05020.30
5.5.220.0070.08720.23
5.5.210.0100.06720.29
5.5.200.0070.06720.27
5.5.190.0070.08020.18
5.5.180.0030.05720.15
5.5.160.0070.04320.19
5.5.150.0130.06720.08
5.5.140.0070.05020.17
5.5.130.0100.07320.21
5.5.120.0100.04320.17
5.5.110.0130.07020.12
5.5.100.0100.04320.07
5.5.90.0030.04720.04
5.5.80.0030.04020.11
5.5.70.0070.04720.15
5.5.60.0030.05320.03
5.5.50.0130.07720.00
5.5.40.0030.05720.06
5.5.30.0030.05320.08
5.5.20.0070.04020.07
5.5.10.0130.07020.02
5.5.00.0100.06019.92
5.4.450.0100.07319.58
5.4.440.0100.05319.23
5.4.430.0070.04319.55
5.4.420.0030.05019.50
5.4.410.0100.07719.09
5.4.400.0100.06719.13
5.4.390.0070.07719.05
5.4.380.0130.07019.25
5.4.370.0030.08019.09
5.4.360.0070.07718.88
5.4.350.0030.05018.90
5.4.340.0100.07018.88
5.4.320.0100.04019.04
5.4.310.0100.05719.16
5.4.300.0070.05719.23
5.4.290.0030.05019.20
5.4.280.0130.06018.91
5.4.270.0030.06319.18
5.4.260.0100.04019.03
5.4.250.0000.07018.94
5.4.240.0130.03018.94
5.4.230.0070.04018.84
5.4.220.0130.03718.87
5.4.210.0170.06719.05
5.4.200.0030.08019.20
5.4.190.0100.04019.03
5.4.180.0070.06718.86
5.4.170.0100.07719.22
5.4.160.0100.07018.83
5.4.150.0070.05019.02
5.4.140.0100.07016.36
5.4.130.0070.06316.28
5.4.120.0130.05716.13
5.4.110.0130.07016.39
5.4.100.0070.05016.34
5.4.90.0100.03316.39
5.4.80.0100.07016.33
5.4.70.0100.05716.38
5.4.60.0070.06716.34
5.4.50.0130.04716.45
5.4.40.0000.04716.39
5.4.30.0070.07316.36
5.4.20.0100.07016.40
5.4.10.0070.06716.29
5.4.00.0130.06715.57
5.3.290.0000.06014.66
5.3.280.0030.05014.60
5.3.270.0070.07314.55
5.3.260.0070.04014.74
5.3.250.0030.05714.70
5.3.240.0000.05314.64
5.3.230.0100.07314.57
5.3.220.0030.05014.68
5.3.210.0000.06014.57
5.3.200.0100.07014.67
5.3.190.0030.05314.63
5.3.180.0070.06314.67
5.3.170.0070.07314.53
5.3.160.0100.07714.49
5.3.150.0070.07714.70
5.3.140.0030.07714.57
5.3.130.0100.03714.64
5.3.120.0130.06714.51
5.3.110.0200.06014.64
5.3.100.0100.06014.15
5.3.90.0070.07714.11
5.3.80.0070.04014.02
5.3.70.0100.03314.01
5.3.60.0130.07313.90
5.3.50.0030.08013.96
5.3.40.0100.07014.05
5.3.30.0100.03713.97
5.3.20.0100.04313.83
5.3.10.0070.03713.64
5.3.00.0070.07313.79
5.2.170.0070.05711.62
5.2.160.0000.06711.62
5.2.150.0030.03711.62
5.2.140.0000.05711.62
5.2.130.0130.05311.62
5.2.120.0070.03011.62
5.2.110.0000.06711.62
5.2.100.0000.05011.62
5.2.90.0030.04011.62
5.2.80.0100.05311.62
5.2.70.0030.03711.62
5.2.60.0030.04711.62
5.2.50.0030.06311.62
5.2.40.0130.04311.62
5.2.30.0030.06311.62
5.2.20.0030.04011.62
5.2.10.0070.04011.62
5.2.00.0030.05711.62
5.1.60.0030.05311.62
5.1.50.0030.02311.62
5.1.40.0000.04011.62
5.1.30.0030.02711.62
5.1.20.0030.03011.62
5.1.10.0070.04311.62
5.1.00.0070.03011.62
5.0.50.0070.04311.62
5.0.40.0070.01711.62
5.0.30.0100.05711.62
5.0.20.0030.04011.62
5.0.10.0070.04011.62
5.0.00.0030.05311.62
4.4.90.0070.03311.62
4.4.80.0100.03311.62
4.4.70.0030.02011.62
4.4.60.0070.02711.62
4.4.50.0100.02311.62
4.4.40.0030.03711.62
4.4.30.0000.01711.62
4.4.20.0000.02711.62
4.4.10.0030.03311.62
4.4.00.0070.04711.62
4.3.110.0000.03711.62
4.3.100.0030.03311.62
4.3.90.0000.03011.62
4.3.80.0000.05311.62
4.3.70.0070.01711.62
4.3.60.0030.01711.62
4.3.50.0030.03311.62
4.3.40.0070.04311.62
4.3.30.0030.02311.62
4.3.20.0000.03011.62
4.3.10.0000.03311.62
4.3.00.0030.02011.62

preferences:
64.11 ms | 400 KiB | 5 Q