3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A implements \JsonSerializable { public $prop; public function jsonSerialize() { $obj = new stdClass; if ($this->prop) { $obj->prop = $this->prop; } return $obj; } } class B implements \JsonSerializable { public $a; public function jsonSerialize() { $obj = new stdClass; if ($this->a) { $obj->a = $this->a; } return $obj; } } $a = new A; $b = new B; $b->a = $a; var_dump(json_encode($b));

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)
8.4.120.0060.00423.88
8.4.110.0110.00922.69
8.4.100.0110.00520.44
8.4.90.0060.00318.99
8.4.80.0140.00520.47
8.4.70.0130.00818.34
8.4.60.0120.00818.80
8.4.50.0040.00618.59
8.4.40.0030.00717.96
8.4.30.0100.01019.30
8.4.20.0130.00720.55
8.4.10.0090.00017.70
8.3.250.0100.00919.12
8.3.240.0090.01017.12
8.3.230.0110.00616.36
8.3.220.0130.00518.94
8.3.210.0170.00416.67
8.3.200.0050.00416.48
8.3.190.0090.01017.10
8.3.180.0100.00717.41
8.3.170.0070.01118.90
8.3.160.0110.00716.93
8.3.150.0060.01217.36
8.3.140.0060.00916.56
8.3.130.0090.00618.65
8.3.120.0090.00319.16
8.3.110.0150.00320.94
8.3.100.0070.00324.06
8.3.90.0130.00726.77
8.3.80.0040.00418.68
8.3.70.0090.01216.74
8.3.60.0040.01118.43
8.3.50.0040.01018.13
8.3.40.0060.00918.86
8.3.30.0060.00918.84
8.3.20.0080.00018.86
8.3.10.0040.00419.16
8.3.00.0040.00423.57
8.2.290.0120.00620.20
8.2.280.0070.01018.49
8.2.270.0070.00317.14
8.2.260.0110.00718.41
8.2.250.0150.00018.44
8.2.240.0060.00317.55
8.2.230.0060.00322.58
8.2.220.0060.00337.54
8.2.210.0040.00426.77
8.2.200.0060.00316.50
8.2.190.0120.00316.75
8.2.180.0110.00718.18
8.2.170.0110.00422.96
8.2.160.0150.00020.43
8.2.150.0030.00524.18
8.2.140.0080.00024.66
8.2.130.0040.00419.66
8.2.120.0040.00426.35
8.2.110.0070.00420.38
8.2.100.0000.01117.78
8.2.90.0040.00417.63
8.2.80.0050.00318.78
8.2.70.0030.00617.55
8.2.60.0080.00017.93
8.2.50.0000.00918.10
8.2.40.0040.00419.33
8.2.30.0040.00419.45
8.2.20.0050.00318.00
8.2.10.0000.00918.02
8.2.00.0040.00419.31
8.1.330.0160.00822.12
8.1.320.0150.00516.32
8.1.310.0180.00016.89
8.1.300.0030.00718.51
8.1.290.0090.00030.84
8.1.280.0130.01025.92
8.1.270.0000.00822.04
8.1.260.0100.00026.35
8.1.250.0080.00028.09
8.1.240.0080.00021.05
8.1.230.0060.00621.04
8.1.220.0030.00517.74
8.1.210.0040.00418.77
8.1.200.0050.00317.47
8.1.190.0040.00417.25
8.1.180.0000.00818.10
8.1.170.0040.00418.47
8.1.160.0030.00618.84
8.1.150.0000.00718.95
8.1.140.0000.00717.71
8.1.130.0000.00719.07
8.1.120.0040.00417.38
8.1.110.0000.00717.29
8.1.100.0040.00417.53
8.1.90.0040.00417.53
8.1.80.0070.00017.48
8.1.70.0030.00317.50
8.1.60.0060.00317.54
8.1.50.0050.00317.45
8.1.40.0090.00317.41
8.1.30.0000.00917.55
8.1.20.0000.00717.63
8.1.10.0000.00817.54
8.1.00.0000.00817.38
8.0.300.0000.00818.77
8.0.290.0050.00316.75
8.0.280.0040.00418.35
8.0.270.0000.00717.18
8.0.260.0030.00319.00
8.0.250.0030.00316.84
8.0.240.0030.00317.01
8.0.230.0070.00016.99
8.0.220.0050.00216.89
8.0.210.0000.00716.91
8.0.200.0030.00317.02
8.0.190.0040.00416.85
8.0.180.0040.00416.83
8.0.170.0080.00016.89
8.0.160.0030.00316.98
8.0.150.0000.00716.92
8.0.140.0040.00416.70
8.0.130.0030.00313.30
8.0.120.0000.00816.81
8.0.110.0070.00016.75
8.0.100.0000.00716.77
8.0.90.0040.00416.79
8.0.80.0050.01016.91
8.0.70.0040.00416.86
8.0.60.0070.00016.87
8.0.50.0000.00716.86
8.0.30.0100.00917.06
8.0.20.0150.00317.40
8.0.10.0050.00217.01
8.0.00.0130.00716.70
7.4.330.0000.00615.55
7.4.320.0030.00316.52
7.4.300.0030.00316.61
7.4.290.0000.00716.44
7.4.280.0030.00516.61
7.4.270.0110.00016.49
7.4.260.0000.00716.56
7.4.250.0000.00716.47
7.4.240.0000.00716.51
7.4.230.0040.00416.39
7.4.220.0030.00516.54
7.4.210.0090.00516.59
7.4.200.0000.00716.70
7.4.160.0080.00916.47
7.4.140.0070.01217.86
7.4.130.0160.00316.46
7.4.120.0100.00916.57
7.4.110.0100.01316.48
7.4.100.0130.00316.65
7.4.90.0130.00316.41
7.4.80.0090.01319.39
7.4.70.0110.00716.53
7.4.60.0000.01916.47
7.4.50.0040.01116.51
7.4.40.0060.01216.65
7.4.00.0120.00515.08
7.3.330.0000.00513.12
7.3.320.0000.00813.17
7.3.310.0070.00016.29
7.3.300.0000.00716.30
7.3.290.0000.00816.32
7.3.280.0070.00916.31
7.3.260.0060.01216.44
7.3.240.0110.00516.51
7.3.230.0070.01016.48
7.3.210.0110.00716.17
7.3.200.0130.00316.24
7.3.190.0000.02216.42
7.3.180.0110.01116.59
7.3.170.0060.01216.53
7.3.160.0040.01116.57
7.3.120.0050.01116.11
7.3.110.0070.01115.95
7.3.100.0050.00815.99
7.3.90.0040.01115.98
7.3.80.0020.01216.14
7.3.70.0050.00816.00
7.3.60.0020.00915.95
7.3.50.0060.00515.93
7.3.40.0040.00416.04
7.3.30.0050.00815.84
7.3.20.0080.00616.83
7.3.10.0030.01216.85
7.3.00.0080.00316.76
7.2.330.0110.00816.63
7.2.320.0160.00316.46
7.2.310.0100.00716.39
7.2.300.0240.00316.76
7.2.290.0130.00316.50
7.2.250.0130.00614.58
7.2.240.0060.00915.99
7.2.230.0070.01016.15
7.2.220.0020.01215.88
7.2.210.0030.01116.00
7.2.200.0060.00816.11
7.2.190.0040.01016.02
7.2.180.0050.00616.15
7.2.170.0020.01315.99
7.2.160.0060.00317.15
7.2.150.0030.01317.15
7.2.140.0000.01117.15
7.2.130.0150.00317.15
7.2.120.0030.00617.15
7.2.110.0000.01217.15
7.2.100.0100.00317.15
7.2.90.0060.00317.20
7.2.80.0080.00817.15
7.2.70.0070.01017.15
7.2.60.0250.00916.10
7.2.50.0950.01016.09
7.2.40.0110.01116.23
7.2.30.0500.00916.17
7.2.20.1090.01116.29
7.2.10.0140.00616.21
7.2.00.0930.00816.29
7.1.330.0110.00516.51
7.1.320.0020.01416.57
7.1.310.0070.00716.54
7.1.300.0060.00716.55
7.1.290.0060.00516.37
7.1.280.0030.00816.51
7.1.270.0090.00816.50
7.1.260.0030.00716.41
7.1.250.0000.00817.15
7.1.200.0000.00715.87
7.1.170.0100.00713.93
7.1.160.2440.01016.88
7.1.150.2100.01316.54
7.1.140.0150.01316.68
7.1.130.2030.01016.80
7.1.120.1860.00816.82
7.1.110.2090.00915.99
7.1.100.1980.01015.76
7.1.90.1740.00816.41
7.1.80.1900.01216.07
7.1.70.1940.00915.29
7.1.60.1950.01433.30
7.1.50.2040.01133.14
7.1.40.1830.01732.53
7.1.30.1970.01532.64
7.1.20.2400.01132.54
7.1.10.2080.01414.84
7.1.00.1880.00915.04

preferences:
30.43 ms | 403 KiB | 5 Q