3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = str_repeat('a', 1 * 1024 * 1024); echo 'Memory usage start: ' . memory_get_usage() . PHP_EOL; echo '$x is: ' . gettype($x) . PHP_EOL; do_unset( $x ); echo 'Memory usage after do_unset: ' . memory_get_usage() . PHP_EOL; echo '$x is: ' . gettype($x) . PHP_EOL; do_null( $x ); echo 'Memory usage after do_null: ' . memory_get_usage() . PHP_EOL; echo '$x is: ' . gettype($x) . PHP_EOL; function do_unset( & $x ) { unset($x); } function do_null( & $x ) { $x = null; }

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)
8.0.120.0050.00217.91
8.0.110.0040.00417.90
8.0.100.0040.00417.96
8.0.90.0040.00417.83
8.0.80.0000.00817.87
8.0.70.0080.00017.98
8.0.60.0000.00817.91
8.0.50.0040.00417.87
8.0.30.0040.00417.74
8.0.20.0040.00418.04
8.0.10.0040.00417.87
8.0.00.0090.00018.01
7.4.250.0000.00717.64
7.4.240.0000.00717.53
7.4.230.0000.00717.43
7.4.220.0000.00817.43
7.4.210.0000.00817.57
7.4.200.0080.00017.63
7.4.190.0040.00417.52
7.4.180.0030.00317.61
7.4.160.0040.00417.57
7.4.150.0000.00817.54
7.4.140.0050.00317.50
7.4.130.0070.00017.54
7.4.120.0050.00217.58
7.4.110.0000.00717.54
7.4.100.0030.00517.36
7.4.90.0000.00817.49
7.4.80.0040.00417.57
7.4.70.0000.00817.38
7.4.60.0000.00717.53
7.4.50.0040.00417.42
7.4.40.0000.00817.47
7.4.30.0050.00317.54
7.4.20.0030.00517.47
7.4.10.0040.00417.57
7.4.00.0000.00817.46
7.3.310.0000.00717.30
7.3.300.0000.00717.37
7.3.290.0030.00317.32
7.3.280.0030.00317.36
7.3.270.0000.00717.38
7.3.260.0050.00217.35
7.3.250.0000.00817.22
7.3.240.0000.00717.36
7.3.230.0040.00417.16
7.3.220.0040.00417.18
7.3.210.0060.00317.32
7.3.200.0000.00817.33
7.3.190.0000.00817.22
7.3.180.0030.00317.33
7.3.170.0040.00417.30
7.3.160.0060.00317.32
7.3.150.0080.00017.22
7.3.140.0090.00017.18
7.3.130.0040.00417.36
7.3.120.0000.00717.13
7.3.110.0000.00717.10
7.3.100.0000.00717.16
7.3.90.0040.00417.39
7.3.80.0060.00317.32
7.3.70.0040.00417.23
7.3.60.0050.00317.35
7.3.50.0070.00017.34
7.3.40.0040.00417.39
7.3.30.0030.00317.45
7.3.20.0090.00017.44
7.3.10.0040.00417.46
7.3.00.0000.00817.25

preferences:
29.66 ms | 400 KiB | 5 Q