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' => 123)); } } 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)
5.4.320.0050.03612.52
5.4.310.0060.03812.51
5.4.300.0070.03512.51
5.4.290.0060.03812.51
5.4.280.0050.03712.41
5.4.270.0050.03612.41
5.4.260.0090.03412.41
5.4.250.0070.03712.41
5.4.240.0050.03812.41
5.4.230.0080.04112.40
5.4.220.0040.03812.40
5.4.210.0070.03512.40
5.4.200.0050.03812.41
5.4.190.0050.03612.40
5.4.180.0070.03612.40
5.4.170.0040.03612.40
5.4.160.0070.03512.40
5.4.150.0050.03512.39
5.4.140.0070.03612.09
5.4.130.0070.03412.07
5.4.120.0080.03512.03
5.4.110.0050.03612.03
5.4.100.0040.03712.03
5.4.90.0040.04212.03
5.4.80.0060.03712.03
5.4.70.0050.03412.03
5.4.60.0060.03412.03
5.4.50.0080.03212.03
5.4.40.0050.03612.01
5.4.30.0050.03812.01
5.4.20.0070.03412.01
5.4.10.0040.03512.01
5.4.00.0050.03511.50
5.3.290.0050.03912.80
5.3.280.0070.04412.71
5.3.270.0080.04012.72
5.3.260.0070.03912.72
5.3.250.0050.03912.72
5.3.240.0090.03812.72
5.3.230.0060.04612.71
5.3.220.0080.03812.68
5.3.210.0060.03912.68
5.3.200.0080.03512.68
5.3.190.0050.03812.68
5.3.180.0040.03812.67
5.3.170.0080.03412.67
5.3.160.0070.03612.67
5.3.150.0070.03612.68
5.3.140.0050.03612.66
5.3.130.0050.04212.66
5.3.120.0080.03812.65
5.3.110.0070.03812.66
5.3.100.0050.04112.13
5.3.90.0070.03512.11
5.3.80.0040.03812.10
5.3.70.0060.03612.10
5.3.60.0040.03812.08
5.3.50.0100.03812.03
5.3.40.0090.04112.03
5.3.30.0080.03511.98
5.3.20.0070.04111.77
5.3.10.0070.04311.73
5.3.00.0050.04111.73
5.2.170.0040.0349.22
5.2.160.0050.0329.22
5.2.150.0040.0319.22
5.2.140.0070.0299.22
5.2.130.0040.0299.18
5.2.120.0050.0299.18
5.2.110.0040.0309.19
5.2.100.0040.0309.18
5.2.90.0040.0309.18
5.2.80.0040.0329.18
5.2.70.0040.0309.18
5.2.60.0040.0309.13
5.2.50.0060.0329.10
5.2.40.0070.0279.08
5.2.30.0030.0329.05
5.2.20.0030.0319.04
5.2.10.0030.0308.95
5.2.00.0050.0288.82
5.1.60.0080.0198.09
5.1.50.0040.0248.09
5.1.40.0040.0248.07
5.1.30.0070.0238.42
5.1.20.0050.0258.44
5.1.10.0030.0278.17
5.1.00.0050.0238.17
5.0.50.0030.0226.65
5.0.40.0020.0226.51
5.0.30.0040.0316.32
5.0.20.0040.0196.29
5.0.10.0040.0216.26
5.0.00.0020.0346.25
4.4.90.0030.0154.78
4.4.80.0030.0144.75
4.4.70.0030.0154.76
4.4.60.0020.0154.75
4.4.50.0020.0164.77
4.4.40.0020.0254.71
4.4.30.0030.0154.76
4.4.20.0030.0154.84
4.4.10.0030.0184.85
4.4.00.0020.0254.76
4.3.110.0010.0174.67
4.3.100.0040.0144.67
4.3.90.0030.0144.63
4.3.80.0020.0254.58
4.3.70.0040.0144.63
4.3.60.0040.0174.63
4.3.50.0040.0144.62
4.3.40.0030.0234.54
4.3.30.0020.0153.30
4.3.20.0020.0163.28
4.3.10.0010.0163.23
4.3.00.0070.0177.59

preferences:
144.01 ms | 1394 KiB | 7 Q