3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = null; $i = 1000000; $t = microtime(true); while ($i--) { $y = is_null($x); } echo microtime(true) - $t, PHP_EOL; $i = 1000000; $t = microtime(true); while ($i--) { $y = null === $x; } echo microtime(true) - $t, 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)
7.4.10.0030.05214.77
7.4.00.0070.04014.84
7.3.130.0030.04714.78
7.3.120.0100.05114.90
7.3.110.0100.05215.11
7.3.100.0100.03514.63
7.3.90.0000.04314.95
7.3.80.0070.04215.04
7.3.70.0030.04014.87
7.3.60.0070.04114.61
7.3.50.0070.03714.89
7.3.40.0070.04314.60
7.3.30.0060.04114.55
7.3.20.0060.03816.41
7.3.10.0050.04216.61
7.3.00.0050.04016.81
7.2.260.0070.05314.77
7.2.250.0100.04814.98
7.2.240.0060.03515.07
7.2.230.0060.05214.79
7.2.220.0070.04015.13
7.2.210.0030.04114.96
7.2.200.0030.04315.02
7.2.190.0000.03814.75
7.2.180.0070.04015.03
7.2.170.0070.03314.83
7.2.160.0070.03514.91
7.2.150.0040.03616.78
7.2.140.0000.04416.97
7.2.130.0080.03316.87
7.2.120.0080.03716.82
7.2.110.0070.03516.72
7.2.100.0050.03816.88
7.2.90.0080.03516.94
7.2.80.0100.03616.97
7.2.70.0050.03416.85
7.2.60.0020.03617.06
7.2.50.0070.03516.98
7.2.40.0030.04016.90
7.2.30.0020.04616.90
7.2.20.0080.03417.07
7.2.10.0050.04017.08
7.2.00.0070.04217.54
7.1.330.0100.09015.96
7.1.320.0000.10615.89
7.1.310.0070.08715.47
7.1.300.0060.08415.78
7.1.290.0100.08515.66
7.1.280.0100.08515.78
7.1.270.0000.09815.68
7.1.260.0000.09715.82
7.1.250.0050.09115.71
7.1.240.0030.08815.70
7.1.230.0030.08915.70
7.1.220.0030.09515.82
7.1.210.0030.09715.88
7.1.200.0000.09515.47
7.1.190.0000.09115.65
7.1.180.0030.09015.47
7.1.170.0100.08515.73
7.1.160.0030.10615.72
7.1.150.0070.10915.70
7.1.140.0000.09215.72
7.1.130.0000.08515.57
7.1.120.0030.10115.70
7.1.110.0000.08915.68
7.1.100.0070.08615.87
7.1.90.0000.10515.95
7.1.80.0070.08715.62
7.1.70.0000.06516.44
7.1.60.0070.08117.63
7.1.50.0110.07316.31
7.1.40.0100.07815.69
7.1.30.0070.08615.49
7.1.20.0000.09115.86
7.1.10.0000.09915.54
7.1.00.0030.08618.91
7.0.330.0000.09415.41
7.0.320.0030.12015.38
7.0.310.0100.08215.56
7.0.300.0070.08915.10
7.0.290.0070.08615.55
7.0.280.0100.08415.33
7.0.270.0000.10515.12
7.0.260.0070.08715.52
7.0.250.0100.08315.42
7.0.240.0030.08815.57
7.0.230.0070.09915.53
7.0.220.0000.09315.47
7.0.210.0070.08515.42
7.0.200.0050.05715.94
7.0.190.0070.08215.36
7.0.180.0030.09515.57
7.0.170.0030.08415.16
7.0.160.0070.09915.37
7.0.150.0030.08915.47
7.0.140.0120.09518.71
7.0.130.0070.08515.60
7.0.120.0160.08415.13
7.0.110.0000.09015.48
7.0.100.0000.09215.50
7.0.90.0030.08615.24
7.0.80.0000.09215.31
7.0.70.0070.09918.58
7.0.60.0020.10818.58
7.0.50.0050.09918.84
7.0.40.0070.10716.76
7.0.30.0050.10216.80
7.0.20.0050.11316.84
7.0.10.0080.11216.82
7.0.00.0030.10516.69
5.6.400.0100.21614.55
5.6.390.0000.21614.28
5.6.380.0070.25514.44
5.6.370.0070.23914.60
5.6.360.0030.24414.11
5.6.350.0030.23614.56
5.6.340.0030.24714.60
5.6.330.0000.23314.52
5.6.320.0070.22514.54
5.6.310.0030.22914.28
5.6.300.0070.26214.49
5.6.290.0000.23414.21
5.6.280.0070.20917.72
5.6.270.0070.20814.29
5.6.260.0030.21314.64
5.6.250.0000.28614.34
5.6.240.0070.23114.22
5.6.230.0030.26414.50
5.6.220.0050.20817.38
5.6.210.0070.21317.52
5.6.200.0070.21917.57
5.6.190.0070.22717.71
5.6.180.0050.25517.76
5.6.170.0070.21817.69
5.6.160.0050.22917.64
5.6.150.0080.20417.56
5.6.140.0020.20017.60
5.6.130.0030.18617.67
5.6.120.0020.18417.64
5.6.110.0070.22917.61
5.6.100.0020.21517.65
5.6.90.0030.19717.73
5.6.80.0030.19117.32
5.6.70.0080.20517.30
5.6.60.0020.24917.39
5.6.50.0030.21917.31
5.6.40.0050.20817.28
5.6.30.0050.23917.41
5.6.20.0070.22317.28
5.6.10.0070.23617.27
5.6.00.0070.20717.30
5.5.380.0030.29314.23
5.5.370.0030.24014.41
5.5.360.0080.22217.47
5.5.350.0050.21417.23
5.5.340.0080.21617.66
5.5.330.0020.22817.57
5.5.320.0020.22017.58
5.5.310.0080.21817.67
5.5.300.0030.20217.37
5.5.290.0050.20717.44
5.5.280.0050.23817.52
5.5.270.0080.21217.65
5.5.260.0030.19417.42
5.5.250.0070.24117.31
5.5.240.0000.24017.27
5.5.230.0100.23617.30
5.5.220.0020.24517.29
5.5.210.0080.21517.26
5.5.200.0120.18017.04
5.5.190.0020.23917.29
5.5.180.0070.22617.09
5.5.170.0070.23814.42
5.5.160.0050.20417.13
5.5.150.0020.17417.19
5.5.140.0050.18917.03
5.5.130.0100.22917.17
5.5.120.0020.19117.15
5.5.110.0050.19017.11
5.5.100.0050.21716.99
5.5.90.0030.23217.09
5.5.80.0050.22717.17
5.5.70.0020.19217.15
5.5.60.0050.20917.13
5.5.50.0070.20117.21
5.5.40.0050.19117.09
5.5.30.0030.21017.14
5.5.20.0000.21617.17
5.5.10.0030.19817.19
5.5.00.0070.20417.15
5.4.450.0050.21615.20
5.4.440.0020.21715.04
5.4.430.0050.24015.16
5.4.420.0020.18215.17
5.4.410.0050.20615.01
5.4.400.0000.21815.10
5.4.390.0050.22814.98
5.4.380.0030.19614.88
5.4.370.0070.22915.03
5.4.360.0050.19614.92
5.4.350.0050.22314.93
5.4.340.0000.19815.01
5.4.330.0000.22410.93
5.4.320.0050.22215.01
5.4.310.0050.25714.99
5.4.300.0070.24914.86
5.4.290.0030.22315.11
5.4.280.0030.23314.73
5.4.270.0050.19314.95
5.4.260.0030.20615.07
5.4.250.0020.22814.96
5.4.240.0020.26115.02
5.4.230.0080.23214.87
5.4.220.0050.21314.96
5.4.210.0130.22114.82
5.4.200.0020.21814.93
5.4.190.0070.21014.96
5.4.180.0030.22614.90
5.4.170.0070.21414.95
5.4.160.0020.22315.10
5.4.150.0030.19914.78
5.4.140.0050.21913.66
5.4.130.0020.23213.64
5.4.120.0030.21913.81
5.4.110.0050.21913.63
5.4.100.0080.21113.55
5.4.90.0030.23813.55
5.4.80.0050.22313.57
5.4.70.0020.21013.51
5.4.60.0100.21113.69
5.4.50.0050.21613.65
5.4.40.0030.21713.72
5.4.30.0030.23013.72
5.4.20.0030.22813.59
5.4.10.0030.20113.76
5.4.00.0050.23913.30
5.3.290.0030.23012.52
5.3.280.0000.25612.43
5.3.270.0030.20812.52
5.3.260.0050.27712.53
5.3.250.0120.25112.45
5.3.240.0000.26412.43
5.3.230.0030.25012.45
5.3.220.0020.23712.27
5.3.210.0030.24512.41
5.3.200.0020.26012.38
5.3.190.0020.24312.33
5.3.180.0020.25512.52
5.3.170.0020.25112.45
5.3.160.0070.22712.58
5.3.150.0020.25112.55
5.3.140.0050.25612.52
5.3.130.0030.28112.40
5.3.120.0030.24112.41
5.3.110.0050.26012.43
5.3.100.0050.24112.10
5.3.90.0000.25412.28
5.3.80.0030.25412.17
5.3.70.0080.22512.09
5.3.60.0050.25012.13
5.3.50.0030.25712.06
5.3.40.0020.26512.08
5.3.30.0000.27712.07
5.3.20.0020.24412.04
5.3.10.0020.22911.86
5.3.00.0030.24511.75
5.2.170.0070.21712.27
5.2.160.0000.24312.27
5.2.150.0070.21312.27
5.2.140.0030.21712.27
5.2.130.0030.21712.27
5.2.120.0030.22312.27
5.2.110.0000.20312.27
5.2.100.0000.22312.27
5.2.90.0000.23312.27
5.2.80.0000.23712.27
5.2.70.0030.22712.27
5.2.60.0000.22712.27
5.2.50.0030.17012.27
5.2.40.0130.23312.27
5.2.30.0000.23312.27
5.2.20.0000.26712.27
5.2.10.0070.23312.27
5.2.00.0030.19312.27
5.1.60.0000.21012.27
5.1.50.0030.14712.27
5.1.40.0000.18312.27
5.1.30.0000.12312.27
5.1.20.0000.16312.27
5.1.10.0030.16012.27
5.1.00.0100.13012.27
5.0.50.0030.33712.27
5.0.40.0000.34012.27
5.0.30.0030.25312.27
5.0.20.0000.29012.27
5.0.10.0000.25312.27
5.0.00.0030.31012.27
4.4.90.0070.36712.27
4.4.80.0030.36012.27
4.4.70.0000.37712.27
4.4.60.0030.34012.27
4.4.50.0030.33712.27
4.4.40.0070.34712.27
4.4.30.0000.28312.27
4.4.20.0030.29312.27
4.4.10.0000.30312.27
4.4.00.0000.28012.27
4.3.110.0000.27712.27
4.3.100.0130.23012.27
4.3.90.0000.29712.27
4.3.80.0000.29712.27
4.3.70.0000.32312.27
4.3.60.0030.35012.27
4.3.50.0000.36712.27
4.3.40.0030.37312.27
4.3.30.0030.33312.27
4.3.20.0030.36312.27
4.3.10.0000.38312.27
4.3.00.0030.34312.27

preferences:
32.09 ms | 401 KiB | 5 Q