3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = 'string'; $a = []; $a['foo'] =& $s; var_dump($a); $a = []; $a['foo'] = $s; var_dump($a);

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)
8.3.60.0090.00616.50
8.3.50.0080.00816.07
8.3.40.0110.00318.68
8.3.30.0080.00818.36
8.3.20.0040.00424.18
8.3.10.0080.00024.66
8.3.00.0020.00526.16
8.2.180.0110.00725.92
8.2.170.0070.01518.95
8.2.160.0120.00322.96
8.2.150.0000.00825.66
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0040.00426.35
8.2.110.0000.00922.30
8.2.100.0090.00317.78
8.2.90.0050.00317.63
8.2.80.0000.00718.78
8.2.70.0000.00817.80
8.2.60.0060.00618.20
8.2.50.0040.00418.10
8.2.40.0050.00321.02
8.2.30.0000.00719.24
8.2.20.0040.00417.97
8.2.10.0040.00419.30
8.2.00.0070.00019.20
8.1.280.0120.00625.92
8.1.270.0000.00823.99
8.1.260.0040.00428.09
8.1.250.0050.00228.09
8.1.240.0050.00522.10
8.1.230.0040.00817.70
8.1.220.0040.00417.78
8.1.210.0030.00518.77
8.1.200.0050.00517.35
8.1.190.0040.00417.00
8.1.180.0040.00418.10
8.1.170.0080.00018.54
8.1.160.0040.00419.00
8.1.150.0000.00918.77
8.1.140.0000.00718.72
8.1.130.0000.00720.11
8.1.120.0030.00317.28
8.1.110.0030.00617.41
8.1.100.0000.00717.27
8.1.90.0000.00717.37
8.1.80.0040.00417.39
8.1.70.0080.00417.39
8.1.60.0000.00817.48
8.1.50.0060.00317.50
8.1.40.0030.00517.37
8.1.30.0000.01117.59
8.1.20.0030.00617.51
8.1.10.0040.00417.47
8.1.00.0040.00417.51
8.0.300.0070.00018.77
8.0.290.0040.00416.63
8.0.280.0030.00318.42
8.0.270.0070.00016.71
8.0.260.0060.00018.28
8.0.250.0030.00516.87
8.0.240.0050.00216.77
8.0.230.0030.00316.77
8.0.220.0050.00216.68
8.0.210.0030.00416.70
8.0.200.0030.00316.90
8.0.190.0050.00516.75
8.0.180.0000.00716.72
8.0.170.0000.00916.85
8.0.160.0030.00316.81
8.0.150.0030.00316.74
8.0.140.0080.00316.81
8.0.130.0000.00513.18
8.0.120.0060.00316.86
8.0.110.0000.00716.77
8.0.100.0050.00216.80
8.0.90.0000.00716.69
8.0.80.0050.01116.81
8.0.70.0040.00416.79
8.0.60.0040.00416.81
8.0.50.0040.00416.79
8.0.30.0030.01316.81
8.0.20.0080.00816.90
8.0.10.0110.00316.93
8.0.00.0030.01217.00
7.4.330.0030.00315.55
7.4.320.0000.00716.48
7.4.300.0000.00616.53
7.4.290.0030.00516.50
7.4.280.0040.00416.47
7.4.270.0000.00716.39
7.4.260.0030.00313.13
7.4.250.0030.00316.39
7.4.240.0000.00716.36
7.4.230.0000.00816.38
7.4.220.0020.00516.57
7.4.210.0110.00616.48
7.4.200.0070.00016.58
7.4.160.0110.00416.60
7.4.150.0000.01416.28
7.4.140.0060.01416.47
7.4.130.0040.01016.37
7.4.120.0140.00716.26
7.4.110.0060.01516.36
7.4.100.0090.01316.50
7.4.90.0180.00316.48
7.4.80.0000.01416.42
7.4.70.0120.00916.44
7.4.60.0110.00316.44
7.4.50.0070.00716.38
7.4.40.0160.00316.41
7.4.30.0080.00516.47
7.4.20.0060.00816.42
7.4.10.0060.00916.32
7.4.00.0000.01416.50
7.3.330.0030.00316.33
7.3.320.0000.00513.18
7.3.310.0030.00316.12
7.3.300.0030.00316.23
7.3.290.0130.00816.28
7.3.270.0090.00916.33
7.3.260.0080.00816.24
7.3.250.0030.01316.21
7.3.240.0120.00916.24
7.3.230.0090.01316.28
7.3.220.0110.01116.15
7.3.210.0100.00316.16
7.3.200.0040.01616.22
7.3.190.0100.01016.24
7.3.180.0080.00816.24
7.3.170.0090.00616.28
7.3.160.0100.00316.22
7.3.150.0110.00416.23
7.3.140.0090.00516.15
7.3.130.0070.00716.20
7.3.120.0060.00916.15
7.3.110.0070.01016.11
7.3.100.0060.01216.02
7.3.90.0030.01016.39
7.3.80.0070.00716.16
7.3.70.0110.00316.21
7.3.60.0100.00716.31
7.3.50.0100.00716.30
7.3.40.0030.01416.41
7.3.30.0150.00616.31
7.3.20.0070.01316.29
7.3.10.0160.00416.30
7.3.00.0130.00416.25

preferences:
58.19 ms | 400 KiB | 5 Q