3v4l.org

run code in 300+ PHP versions simultaneously
<?php $source = ["a" => 1, "b" => 2, "c" => 3]; echo json_encode(["d" => 4, "b" => 10] + $source) . PHP_EOL; echo json_encode(array_merge($source, ["d" => 4, "b" => 10])) . PHP_EOL;

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)
8.4.120.0100.00920.64
8.4.110.0060.00317.79
8.4.100.0110.01017.77
8.4.90.0120.00920.40
8.4.80.0110.00518.57
8.4.70.0110.00618.84
8.4.60.0100.00920.25
8.4.50.0090.00518.66
8.4.40.0130.00717.75
8.4.30.0040.01420.27
8.4.20.0120.00917.83
8.4.10.0130.00319.74
8.3.250.0120.00716.45
8.3.240.0100.00418.52
8.3.230.0040.00516.70
8.3.220.0090.00918.94
8.3.210.0080.01016.49
8.3.200.0050.00616.60
8.3.190.0050.00516.93
8.3.180.0020.00618.83
8.3.170.0140.00319.06
8.3.160.0090.00918.91
8.3.150.0060.01216.34
8.3.140.0050.00318.90
8.3.130.0030.00518.32
8.3.120.0080.00019.04
8.3.110.0070.00320.94
8.3.100.0080.00016.38
8.3.90.0070.00726.77
8.3.80.0030.00616.63
8.3.70.0070.00718.34
8.3.60.0160.00318.31
8.3.50.0100.01024.43
8.3.40.0140.00718.79
8.3.30.0030.01318.76
8.3.20.0040.00424.18
8.3.10.0030.00624.66
8.3.00.0070.00026.16
8.2.290.0150.00416.42
8.2.280.0120.01218.44
8.2.270.0120.00618.63
8.2.260.0070.01116.93
8.2.250.0060.00319.04
8.2.240.0090.00017.00
8.2.230.0070.00422.58
8.2.220.0040.00424.06
8.2.210.0190.00026.77
8.2.200.0080.00016.38
8.2.190.0090.00916.63
8.2.180.0110.00425.92
8.2.170.0120.00318.89
8.2.160.0090.00622.96
8.2.150.0080.00025.66
8.2.140.0080.00024.66
8.2.130.0070.00026.16
8.2.120.0050.00326.35
8.2.110.0040.00422.20
8.2.100.0070.00417.84
8.2.90.0040.00417.88
8.2.80.0080.00018.85
8.2.70.0030.00617.50
8.2.60.0100.00018.04
8.2.50.0000.00818.07
8.2.40.0040.00418.16
8.2.30.0040.00417.93
8.2.20.0000.00718.11
8.2.10.0000.00719.09
8.2.00.0000.00819.05
8.1.330.0060.00216.27
8.1.320.0100.00915.89
8.1.310.0080.00016.73
8.1.300.0040.00418.53
8.1.290.0090.00030.84
8.1.280.0110.01125.92
8.1.270.0040.00423.99
8.1.260.0050.00228.09
8.1.250.0070.00028.09
8.1.240.0090.00022.17
8.1.230.0040.00717.62
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0030.00617.35
8.1.190.0050.00217.23
8.1.180.0030.00618.10
8.1.170.0080.00018.64
8.1.160.0080.00018.88
8.1.150.0000.00718.88
8.1.140.0050.00318.88
8.1.130.0070.00020.01
8.1.120.0000.00817.45
8.1.110.0000.00817.43
8.1.100.0030.00717.49
8.1.90.0040.00417.34
8.1.80.0030.00617.33
8.1.70.0040.00417.45
8.1.60.0000.00717.56
8.1.50.0000.00817.50
8.1.40.0030.00617.52
8.1.30.0000.00817.56
8.1.20.0030.00517.67
8.1.10.0030.00617.51
8.1.00.0040.00717.33
8.0.300.0000.00718.77
8.0.290.0040.00416.75
8.0.280.0030.00318.39
8.0.270.0000.00717.99
8.0.260.0060.00018.53
8.0.250.0070.00017.05
8.0.240.0060.00417.05
8.0.230.0040.00417.01
8.0.220.0030.00316.85
8.0.210.0060.00016.96
8.0.200.0060.00316.95
8.0.190.0040.00416.87
8.0.180.0040.00416.95
8.0.170.0030.00616.85
8.0.160.0000.00716.80
8.0.150.0040.00416.91
8.0.140.0030.00316.96
8.0.130.0000.00513.39
8.0.120.0000.00816.88
8.0.110.0040.00416.80
8.0.100.0000.00816.91
8.0.90.0050.00216.82
8.0.80.0100.00716.90
8.0.70.0040.00416.81
8.0.60.0000.00716.89
8.0.50.0040.00416.77
8.0.30.0100.00717.07
8.0.20.0130.00616.96
8.0.10.0090.01416.98
8.0.00.0140.00517.17
7.4.330.0000.00515.55
7.4.320.0030.00316.51
7.4.300.0000.00616.52
7.4.290.0030.00316.40
7.4.280.0000.00716.40
7.4.270.0000.00716.43
7.4.260.0000.00513.18
7.4.250.0050.00316.55
7.4.240.0000.00716.52
7.4.230.0000.00616.33
7.4.220.0040.00516.40
7.4.210.0080.00916.52
7.4.200.0000.00716.34
7.4.150.0060.01216.35
7.4.140.0150.00516.35
7.4.130.0110.00716.40
7.4.120.0120.00616.32
7.4.110.0090.01416.41
7.4.100.0070.01116.22
7.4.90.0100.01016.35
7.4.80.0110.00816.32
7.4.70.0120.00916.28
7.4.60.0150.00716.39
7.4.50.0110.00916.38
7.4.40.0110.01116.32
7.4.30.0090.01016.22
7.4.20.0130.00816.35
7.4.10.0130.01016.37
7.4.00.0110.00916.36
7.3.330.0060.00316.27
7.3.320.0060.00013.02
7.3.310.0070.00016.25
7.3.300.0030.00316.21
7.3.290.0120.00516.24
7.3.270.0080.00916.34
7.3.260.0120.00616.47
7.3.250.0140.00816.30
7.3.240.0160.00416.21
7.3.230.0110.01116.47
7.3.220.0070.01016.38
7.3.210.0120.00716.40
7.3.200.0130.00716.36
7.3.190.0130.00916.43
7.3.180.0090.01016.43
7.3.170.0100.01216.50
7.3.160.0100.00916.42
7.3.150.0100.01016.20
7.3.140.0140.00516.40
7.3.130.0130.00716.36
7.3.120.0100.00916.47
7.3.110.0120.00716.40
7.3.100.0150.00716.38
7.3.90.0120.00816.41
7.3.80.0120.01016.48
7.3.70.0170.00816.26
7.3.60.0100.00916.43
7.3.50.0160.01116.26
7.3.40.0070.01316.24
7.3.30.0120.00916.24
7.3.20.0130.00816.38
7.3.10.0160.00516.35
7.3.00.0120.00516.35

preferences:
28.98 ms | 403 KiB | 5 Q