3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A implements JsonSerializable { public function jsonSerialize() { return 'A'; } } $b = []; $b[] = new A(); $b[] = new A(); var_dump(json_encode($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)
8.5.20.0130.00719.53
8.5.10.0110.00716.72
8.5.00.0110.01020.11
8.4.160.0120.01023.95
8.4.150.0030.00014.05
8.4.140.0110.00917.61
8.4.130.0120.00718.79
8.4.120.0080.00524.13
8.4.110.0090.01018.89
8.4.100.0070.00318.97
8.4.90.0060.00219.07
8.4.80.0030.00518.82
8.4.70.0110.01018.17
8.4.60.0120.00818.95
8.4.50.0110.00918.41
8.4.40.0130.00719.46
8.4.30.0130.00620.48
8.4.20.0030.00519.01
8.4.10.0130.00719.71
8.3.290.0130.00720.64
8.3.280.0150.00618.38
8.3.270.0100.00916.88
8.3.260.0120.00816.68
8.3.250.0090.00919.08
8.3.240.0050.00517.17
8.3.230.0110.00416.68
8.3.220.0100.01018.88
8.3.210.0170.00318.63
8.3.200.0030.00616.98
8.3.190.0110.00819.00
8.3.180.0050.00317.27
8.3.170.0120.00620.71
8.3.160.0120.00618.68
8.3.150.0120.00617.23
8.3.140.0040.00418.71
8.3.130.0100.00018.79
8.3.120.0060.00319.05
8.3.110.0090.00016.88
8.3.100.0100.00724.06
8.3.90.0030.00526.77
8.3.80.0060.00316.88
8.3.70.0110.00417.00
8.3.60.0060.01218.68
8.3.50.0110.00716.59
8.3.40.0140.00018.71
8.3.30.0070.00718.71
8.3.20.0000.00824.18
8.3.10.0040.00424.66
8.3.00.0080.00026.16
8.2.300.0100.00822.13
8.2.290.0090.00920.50
8.2.280.0090.01218.50
8.2.270.0110.00317.54
8.2.260.0100.00016.83
8.2.250.0080.00018.48
8.2.240.0060.00318.99
8.2.230.0040.00420.94
8.2.220.0080.00037.54
8.2.210.0100.01026.77
8.2.200.0000.00916.75
8.2.190.0110.00718.29
8.2.180.0140.00725.92
8.2.170.0080.01118.91
8.2.160.0120.00322.96
8.2.150.0080.00025.66
8.2.140.0070.00024.66
8.2.130.0040.00426.16
8.2.120.0040.00426.16
8.2.110.0000.00920.52
8.2.100.0070.00417.84
8.2.90.0040.00417.91
8.2.80.0000.00917.97
8.2.70.0030.00617.50
8.2.60.0000.01117.79
8.2.50.0060.00318.05
8.2.40.0050.00319.88
8.2.30.0030.00518.10
8.2.20.0000.00718.20
8.2.10.0040.00419.26
8.2.00.0080.00019.22
8.1.340.0120.00821.77
8.1.330.0130.00721.98
8.1.320.0100.01016.10
8.1.310.0070.01118.70
8.1.300.0060.01318.42
8.1.290.0030.00618.88
8.1.280.0080.00625.92
8.1.270.0040.00423.99
8.1.260.0040.00426.35
8.1.250.0000.00928.09
8.1.240.0100.00020.69
8.1.230.0070.00322.73
8.1.220.0000.00917.74
8.1.210.0080.00018.85
8.1.200.0040.00417.35
8.1.190.0040.00417.35
8.1.180.0060.00318.10
8.1.170.0070.00718.22
8.1.160.0000.00718.95
8.1.150.0070.00018.79
8.1.140.0000.00718.80
8.1.130.0030.00320.18
8.1.120.0050.00217.43
8.1.110.0030.00517.41
8.1.100.0040.00417.29
8.1.90.0000.00717.46
8.1.80.0030.00717.42
8.1.70.0040.00417.46
8.1.60.0050.00317.53
8.1.50.0040.00417.47
8.1.40.0030.00517.40
8.1.30.0000.00817.66
8.1.20.0000.00817.70
8.1.10.0080.00317.50
8.1.00.0070.00517.41
8.0.300.0030.00320.03
8.0.290.0040.00416.75
8.0.280.0030.00518.50
8.0.270.0030.00318.01
8.0.260.0000.00618.48
8.0.250.0000.00716.95
8.0.240.0070.00016.85
8.0.230.0000.00716.92
8.0.220.0070.00016.91
8.0.210.0050.00216.81
8.0.200.0030.00316.94
8.0.190.0040.00416.93
8.0.180.0040.00416.96
8.0.170.0040.00416.88
8.0.160.0030.00616.89
8.0.150.0050.00316.82
8.0.140.0040.00416.91
8.0.130.0030.00313.34
8.0.120.0000.00716.75
8.0.110.0030.00516.82
8.0.100.0040.00416.86
8.0.90.0000.00816.90
8.0.80.0030.01416.82
8.0.70.0040.00416.77
8.0.60.0040.00416.88
8.0.50.0000.00716.80
8.0.30.0060.01116.84
8.0.20.0080.00816.87
8.0.10.0060.00916.97
8.0.00.0120.00317.05
7.4.330.0000.00415.55
7.4.320.0000.00616.60
7.4.300.0070.00016.60
7.4.290.0030.00616.46
7.4.280.0070.00016.42
7.4.270.0070.00016.59
7.4.260.0030.00313.29
7.4.250.0030.00316.45
7.4.240.0050.00216.61
7.4.230.0000.00716.68
7.4.220.0060.00216.40
7.4.210.0070.00616.52
7.4.200.0070.00016.50
7.4.160.0090.00616.48
7.4.150.0030.01216.39
7.4.140.0030.01616.36
7.4.130.0040.01216.33
7.4.120.0000.01416.34
7.4.110.0030.01016.42
7.4.100.0000.01416.51
7.4.90.0040.01116.50
7.4.80.0100.00316.44
7.4.70.0060.00816.35
7.4.60.0080.00616.39
7.4.50.0090.00616.40
7.4.40.0040.01116.34
7.4.30.0080.00816.55
7.4.20.0100.00616.55
7.4.10.0070.00716.41
7.4.00.0060.00916.67
7.3.330.0000.00716.38
7.3.320.0050.00013.29
7.3.310.0040.00416.20
7.3.300.0000.00716.19
7.3.290.0100.00516.32
7.3.280.0110.00416.26
7.3.270.0030.01216.34
7.3.260.0080.00616.33
7.3.250.0060.00916.26
7.3.240.0130.00016.27
7.3.230.0110.00316.31
7.3.220.0130.00316.23
7.3.210.0060.00916.21
7.3.200.0030.01016.14
7.3.190.0030.01416.22
7.3.180.0100.00316.28
7.3.170.0110.00716.20
7.3.160.0030.01316.25
7.3.150.0120.00316.21
7.3.140.0030.01016.23
7.3.130.0030.01016.20
7.3.120.0030.01016.24
7.3.110.0100.00316.14
7.3.100.0070.00716.14
7.3.90.0100.00316.50
7.3.80.0030.01016.32
7.3.70.0100.00316.38
7.3.60.0030.01016.35
7.3.50.0070.00716.23
7.3.40.0040.00816.24
7.3.30.0070.00616.24
7.3.20.0190.01316.42
7.3.10.0090.00616.29
7.3.00.0070.00716.35

preferences:
41.37 ms | 403 KiB | 5 Q