3v4l.org

run code in 300+ PHP versions simultaneously
<?php $null = null; $time = microtime(true); for ($i = 0; $i < 10000000; $i++) { $test = is_null($null); } $time1 = microtime(true); for ($i = 0; $i < 10000000; $i++) { $test = null === $null; } $time2 = microtime(true); echo 'is_null: '.($time1 - $time)."\n===: ".($time2 - $time1);

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)
7.2.00.0030.33618.91
7.1.70.0030.27917.15
7.1.60.0100.34819.47
7.1.50.0130.33416.64
7.1.00.0030.39722.36
7.0.200.0570.38914.50
7.0.60.0270.48719.98
7.0.50.1430.47720.44
7.0.40.1370.48320.39
7.0.30.1070.47320.41
7.0.20.1130.49320.43
7.0.10.1200.53720.40
7.0.00.1670.61720.42
5.6.280.0031.51021.07
5.6.210.0201.74720.78
5.6.200.1201.74021.04
5.6.190.1171.82721.05
5.6.180.0971.66021.02
5.6.170.1101.65021.07
5.6.160.1271.81021.20
5.6.150.0271.77321.05
5.6.140.1231.62721.12
5.6.130.1231.63021.05
5.6.120.0431.86721.04
5.6.110.0631.84721.04
5.6.100.1602.08321.05
5.6.90.2331.30720.98
5.6.80.1231.17720.39
5.6.70.1231.16320.45
5.6.60.0771.15020.43
5.6.50.0871.02020.56
5.6.40.1231.35720.56
5.6.30.0772.07020.42
5.6.20.1132.20320.51
5.6.10.1131.77320.41
5.6.00.1671.84320.37
5.5.350.0572.00320.48
5.5.340.1201.84020.83
5.5.330.1171.71720.95
5.5.320.1201.65020.82
5.5.310.0971.69320.86
5.5.300.1131.75720.77
5.5.290.0932.08320.82
5.5.280.0302.05020.84
5.5.270.1171.96320.70
5.5.260.1401.45321.02
5.5.250.1271.65320.64
5.5.240.0301.19320.41
5.5.230.1071.05320.14
5.5.220.1001.16720.21
5.5.210.1201.19020.14
5.5.200.1131.60320.34
5.5.190.0871.98020.12
5.5.180.1132.17020.11
5.5.160.1031.94020.21
5.5.150.1031.62720.09
5.5.140.1201.51720.06
5.5.130.1071.56020.08
5.5.120.1601.42320.34
5.5.110.1231.17720.30
5.5.100.0801.09020.11
5.5.90.0800.84720.00
5.5.80.1000.92020.26
5.5.70.1170.61719.95
5.5.60.1030.98020.10
5.5.50.0830.97320.12
5.5.40.0701.09020.11
5.5.30.1001.07020.11
5.5.20.1001.08020.05
5.5.10.0801.21319.97
5.5.00.1031.19320.11

preferences:
30.78 ms | 400 KiB | 5 Q