3v4l.org

run code in 300+ PHP versions simultaneously
<?php $isset = true; $array = array(); $notSetArray = array(0=>''); $string = ''; // Test Source function TestEmpty() { $array = array(); unset($array); $i = 0; /* The Test */ $t = microtime(true); while($i < 2000) { empty($arrday); ++$i; } echo (microtime(true) - $t); } function TestEmpty2() { $array = array(); unset($array); $i = 0; /* The Test */ $t = microtime(true); while($i < 2000) { ($array == []); ++$i; } echo (microtime(true) - $t); } function TestEmpty3() { $array = array(); unset($array); $i = 0; /* The Test */ $t = microtime(true); while($i < 2000) { ($array === []); ++$i; } echo (microtime(true) - $t); } TestEmpty(); echo "\n\n"; TestEmpty2(); echo "\n\n"; TestEmpty3();

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)
7.2.00.0060.00619.44
7.1.70.0000.01016.76
7.1.60.0030.02019.39
7.1.50.0140.01117.20
7.1.00.0000.07722.45
7.0.200.0070.00716.73
7.0.140.0030.07321.96
7.0.100.0100.03720.08
7.0.90.0370.07019.86
7.0.80.0130.06319.93
7.0.70.0030.06319.87
7.0.60.0170.07719.91
7.0.50.0400.07320.30
7.0.40.0030.08720.05
7.0.30.0100.08320.05
7.0.20.0100.04320.15
7.0.10.0130.07020.12
7.0.00.0200.06719.95
5.6.280.0030.07721.10
5.6.250.0100.03020.69
5.6.240.0130.07320.55
5.6.230.0130.07720.70
5.6.220.0070.07720.57
5.6.210.0170.07320.63
5.6.200.0130.04721.18
5.6.190.0070.07720.97
5.6.180.0030.04321.03
5.6.170.0170.07021.04
5.6.160.0030.09021.05
5.6.150.0130.07020.97
5.6.140.0130.07020.94
5.6.130.0200.04020.93
5.6.120.0070.07020.94
5.6.110.0070.04721.02
5.6.100.0070.07721.04
5.6.90.0100.08321.01
5.6.80.0030.08020.47
5.6.70.0170.05320.41
5.6.60.0000.06720.45
5.6.50.0070.06320.50
5.6.40.0170.06720.42
5.6.30.0030.04320.38
5.6.20.0070.08720.41
5.6.10.0070.06020.42
5.6.00.0030.04720.41
5.5.380.0030.08720.35
5.5.370.0170.05720.33
5.5.360.0030.07720.37
5.5.350.0070.09320.55
5.5.340.0200.07720.87
5.5.330.0270.07020.98
5.5.320.0130.06020.93
5.5.310.0100.08320.75
5.5.300.0130.05320.89
5.5.290.0130.05320.81
5.5.280.0100.07020.92
5.5.270.0230.07320.88
5.5.260.0070.06320.68
5.5.250.0070.06720.71
5.5.240.0030.06720.25
5.5.230.0100.05020.31
5.5.220.0030.06320.11
5.5.210.0070.06720.27
5.5.200.0030.05720.27
5.5.190.0070.06320.29
5.5.180.0100.06020.34
5.5.160.0070.06020.25
5.5.150.0170.08020.20
5.5.140.0000.09020.24
5.5.130.0170.07720.33
5.5.120.0070.05720.31
5.5.110.0130.05320.28
5.5.100.0130.05720.19
5.5.90.0100.05720.21
5.5.80.0130.06020.20
5.5.70.0100.05320.23
5.5.60.0100.07320.15
5.5.50.0100.06020.21
5.5.40.0100.07020.15
5.5.30.0130.07020.14
5.5.20.0200.05320.23
5.5.10.0100.05320.05
5.5.00.0100.06320.04
5.4.450.0030.06719.38
5.4.440.0100.08019.45
5.4.430.0030.06719.15
5.4.420.0130.06319.38
5.4.410.0200.05319.42
5.4.400.0070.07718.86
5.4.390.0070.05719.04
5.4.380.0070.06019.02
5.4.370.0070.07718.98
5.4.360.0300.04018.96
5.4.350.0100.04018.99
5.4.340.0130.07019.05
5.4.320.0100.08018.89
5.4.310.0100.07018.97
5.4.300.0070.07718.83
5.4.290.0100.06719.03
5.4.280.0070.05718.91
5.4.270.0230.06018.83
5.4.260.0100.05019.07
5.4.250.0100.06319.21
5.4.240.0000.06019.02
5.4.230.0000.08018.83
5.4.220.0130.05319.05
5.4.210.0200.04019.21
5.4.200.0030.07319.03
5.4.190.0130.06718.81
5.4.180.0030.05318.95
5.4.170.0130.04719.06
5.4.160.0100.04719.11
5.4.150.0100.07318.91
5.4.140.0170.03716.48
5.4.130.0130.05016.30
5.4.120.0170.06716.38
5.4.110.0070.03716.38
5.4.100.0030.05316.54
5.4.90.0070.06716.45
5.4.80.0070.03316.28
5.4.70.0130.04316.50
5.4.60.0130.05716.46
5.4.50.0070.07016.43
5.4.40.0100.06016.25
5.4.30.0130.04316.46
5.4.20.0170.05716.34
5.4.10.0100.04716.22
5.4.00.0070.07015.83
5.3.290.0030.08315.67
5.3.280.0070.07015.67
5.3.270.0130.05015.67
5.3.260.0000.06715.67
5.3.250.0070.06315.67
5.3.240.0100.03715.67
5.3.230.0100.06315.67
5.3.220.0130.03715.67
5.3.210.0070.06015.67
5.3.200.0030.04315.67
5.3.190.0030.04315.67
5.3.180.0170.03315.67
5.3.170.0100.06315.67
5.3.160.0100.07315.67
5.3.150.0070.06315.67
5.3.140.0130.07015.67
5.3.130.0030.04015.67
5.3.120.0030.07315.67
5.3.110.0100.05015.67
5.3.100.0130.05015.67
5.3.90.0130.03715.67
5.3.80.0030.04715.67
5.3.70.0030.07015.67
5.3.60.0030.05315.67
5.3.50.0000.04315.67
5.3.40.0100.06015.67
5.3.30.0000.03315.67
5.3.20.0030.04715.67
5.3.10.0130.04715.67
5.3.00.0070.05015.67
5.2.170.0030.03315.67
5.2.160.0100.02715.67
5.2.150.0030.05315.67
5.2.140.0000.03315.67
5.2.130.0070.02715.67
5.2.120.0030.06315.67
5.2.110.0030.05715.67
5.2.100.0030.04715.67
5.2.90.0070.05315.67
5.2.80.0030.03315.67
5.2.70.0030.05715.67
5.2.60.0100.03315.67
5.2.50.0070.04015.67
5.2.40.0000.04715.67
5.2.30.0070.05015.67
5.2.20.0000.06315.67
5.2.10.0030.04315.67
5.2.00.0030.03315.67
5.1.60.0000.05715.67
5.1.50.0070.02315.67
5.1.40.0030.04015.67
5.1.30.0130.04315.67
5.1.20.0130.03315.67
5.1.10.0030.03015.67
5.1.00.0070.04715.67
5.0.50.0030.05015.67
5.0.40.0030.02015.67
5.0.30.0000.04715.67
5.0.20.0000.03015.67
5.0.10.0000.04315.67
5.0.00.0030.05715.67
4.4.90.0000.01715.67
4.4.80.0030.02715.67
4.4.70.0030.03315.67
4.4.60.0030.03315.67
4.4.50.0030.03715.67
4.4.40.0000.04015.67
4.4.30.0000.01715.67
4.4.20.0000.03715.67
4.4.10.0000.03015.67
4.4.00.0070.05315.67
4.3.110.0100.00715.67
4.3.100.0030.03315.67
4.3.90.0070.01715.67
4.3.80.0030.04715.67
4.3.70.0030.02715.67
4.3.60.0030.01715.67
4.3.50.0030.01715.67
4.3.40.0070.04715.67
4.3.30.0000.01715.67
4.3.20.0030.03315.67
4.3.10.0000.02315.67
4.3.00.0030.01315.67

preferences:
40.48 ms | 401 KiB | 5 Q