3v4l.org

run code in 300+ PHP versions simultaneously
<?php function entropy($a, $b) { $options = array_filter(func_get_args()); $total = array_sum($options); $entropy = 0; foreach ($options as $size) { $part = $size / $total; $entropy -= $part * log($part, 2); } return $entropy; } var_dump('1 4', entropy(1, 4)); // abbbb echo "\n"; var_dump('2 2', entropy(2, 2)); // aabb echo "\n"; var_dump('2 2 2', entropy(2, 2, 2)); // aabbcc echo "\n"; var_dump('2 2 2 2', entropy(2, 2, 2, 2)); // aabbccdd echo "\n";

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)
8.3.60.0090.01216.63
8.3.50.0100.00822.14
8.3.40.0130.00318.97
8.3.30.0040.01119.16
8.3.20.0070.00020.32
8.3.10.0080.00021.66
8.3.00.0060.00319.38
8.2.180.0070.00716.38
8.2.170.0070.00722.96
8.2.160.0100.00320.43
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0070.00026.16
8.2.120.0150.00019.48
8.2.110.0030.00619.33
8.2.100.0070.00417.88
8.2.90.0040.00419.22
8.2.80.0060.00317.97
8.2.70.0040.00417.73
8.2.60.0080.00018.05
8.2.50.0000.01118.07
8.2.40.0080.00020.19
8.2.30.0040.00418.27
8.2.20.0000.00817.91
8.2.10.0040.00418.27
8.2.00.0000.00717.73
8.1.280.0090.00925.92
8.1.270.0040.00419.07
8.1.260.0000.00826.35
8.1.250.0040.00428.09
8.1.240.0060.00324.01
8.1.230.0000.01217.79
8.1.220.0030.00617.78
8.1.210.0040.00418.77
8.1.200.0040.00417.35
8.1.190.0040.00417.35
8.1.180.0000.00818.10
8.1.170.0060.00319.00
8.1.160.0050.00222.10
8.1.150.0040.00419.05
8.1.140.0030.00617.59
8.1.130.0000.00717.79
8.1.120.0040.00417.56
8.1.110.0080.00017.44
8.1.100.0040.00417.53
8.1.90.0040.00417.52
8.1.80.0000.00717.53
8.1.70.0000.00717.61
8.1.60.0040.00417.71
8.1.50.0040.00417.64
8.1.40.0070.00317.54
8.1.30.0030.00617.75
8.1.20.0050.00217.71
8.1.10.0000.00717.59
8.1.00.0040.00417.52
8.0.300.0030.00518.77
8.0.290.0000.00716.75
8.0.280.0030.00318.54
8.0.270.0000.00717.34
8.0.260.0000.00617.41
8.0.250.0030.00316.96
8.0.240.0080.00017.04
8.0.230.0030.00317.01
8.0.220.0070.00016.83
8.0.210.0070.00016.93
8.0.200.0000.00716.91
8.0.190.0050.00316.99
8.0.180.0040.00417.07
8.0.170.0040.00416.87
8.0.160.0000.00717.05
8.0.150.0000.00716.88
8.0.140.0040.00416.98
8.0.130.0000.00613.41
8.0.120.0030.00616.91
8.0.110.0050.00316.89
8.0.100.0070.00016.98
8.0.90.0050.00316.84
8.0.80.0030.01216.97
8.0.70.0060.00316.93
8.0.60.0000.00716.86
8.0.50.0040.00417.00
8.0.30.0160.00717.23
8.0.20.0130.00617.40
8.0.10.0020.00517.14
8.0.00.0100.01116.88
7.4.330.0050.00015.15
7.4.320.0060.00016.70
7.4.300.0080.00016.82
7.4.290.0000.00916.82
7.4.280.0030.00616.57
7.4.270.0030.00316.74
7.4.260.0000.00716.68
7.4.250.0040.00516.67
7.4.240.0020.00516.61
7.4.230.0000.00716.84
7.4.220.0240.00316.64
7.4.210.0070.01016.66
7.4.200.0040.00416.91
7.4.160.0060.01016.45
7.4.150.0080.01217.40
7.4.140.0120.00817.86
7.4.130.0090.00816.60
7.4.120.0110.00816.74
7.4.110.0130.00616.66
7.4.100.0060.01216.48
7.4.90.0130.00316.61
7.4.80.0070.01019.39
7.4.70.0060.01116.63
7.4.60.0030.01616.44
7.4.50.0030.00616.84
7.4.40.0140.00916.53
7.4.30.0120.00616.50
7.4.00.0040.00415.23
7.3.330.0000.00713.40
7.3.320.0090.00413.57
7.3.310.0040.00416.68
7.3.300.0030.00316.59
7.3.290.0000.00616.48
7.3.280.0070.00816.46
7.3.270.0170.00717.40
7.3.260.0090.00916.39
7.3.250.0130.00816.53
7.3.240.0060.01216.54
7.3.230.0030.02016.70
7.3.210.0130.00316.70
7.3.200.0110.01119.39
7.3.190.0110.00816.68
7.3.180.0090.00616.54
7.3.170.0150.00616.52
7.3.160.0150.00316.64
7.2.330.0120.00416.59
7.2.320.0040.01316.76
7.2.310.0140.00316.48
7.2.300.0090.00616.67
7.2.290.0070.01016.78
7.2.00.0000.01619.78
7.1.100.0000.01118.43
7.1.70.0000.00817.50
7.1.60.0140.00817.46
7.1.50.0070.01117.30
7.1.00.0070.07322.59
7.0.200.0030.01316.98
7.0.140.0070.06722.25
7.0.60.0000.08320.29
7.0.50.0070.03718.19
7.0.40.0070.08020.45
7.0.30.0200.04320.43
7.0.20.0200.04020.34
7.0.10.0100.06020.38
7.0.00.0030.04320.50
5.6.280.0070.06721.23
5.6.210.0100.08020.91
5.6.200.0030.05018.44
5.6.190.0170.07720.71
5.6.180.0470.05721.02
5.6.170.0100.04720.84
5.6.160.0070.07020.86
5.6.150.0170.07018.41
5.6.140.0030.08018.49
5.6.130.0100.05318.42
5.6.120.0200.07321.18
5.6.110.0030.09321.32
5.6.100.0030.08721.23
5.6.90.0030.06021.37
5.6.80.0230.06320.82
5.5.350.0300.07020.72
5.5.340.0170.07718.22
5.5.330.0100.07320.59
5.5.320.0430.07020.59
5.5.310.0170.03720.63
5.5.300.0030.04318.33
5.5.290.0100.07718.33
5.5.280.0170.07721.19
5.5.270.0170.07721.04
5.5.260.0030.04321.18
5.5.250.0030.04320.96
5.5.240.0000.08020.36
5.4.450.0670.06019.75
5.4.440.0700.05019.68
5.4.430.0170.05319.47
5.4.420.1000.06019.59
5.4.410.0630.06019.66
5.4.400.0300.05018.89
5.4.390.0270.05018.75
5.4.380.0270.05318.77
5.4.370.0270.05018.86
5.4.360.0230.05718.91
5.4.350.0230.06018.70
5.4.340.0270.05018.63
5.4.320.0300.06718.74
5.4.310.0100.06718.96
5.4.300.0400.05718.87
5.4.290.0230.06718.77
5.4.280.0270.05318.88
5.4.270.0200.05718.70
5.4.260.0130.06018.87
5.4.250.0070.09318.91
5.4.240.0170.06018.91
5.4.230.0230.07018.64
5.4.220.0330.05018.89
5.4.210.0200.07718.61
5.4.200.0370.05316.84
5.4.190.0300.05318.85
5.4.180.0130.06718.87
5.4.170.0200.06318.85
5.4.160.0270.04718.86
5.4.150.0230.05318.63
5.4.140.0270.06716.42
5.4.130.0130.07716.47
5.4.120.0200.06316.53
5.4.110.0300.06016.30
5.4.100.0230.07316.43
5.4.90.0230.07016.43
5.4.80.0230.05016.37
5.4.70.0230.05716.38
5.4.60.0130.06016.34
5.4.50.0330.04716.41
5.4.40.0170.06016.44
5.4.30.0230.05016.43
5.4.20.0330.04316.51
5.4.10.0170.07016.28
5.4.00.0170.07015.83
5.3.290.0300.06715.00
5.3.280.0330.05314.79
5.3.270.0230.06014.72
5.3.260.0230.07314.77
5.3.250.0300.04314.73
5.3.240.0130.06714.73
5.3.230.0230.06314.93
5.3.220.0200.05014.68
5.3.210.0130.06714.72
5.3.200.0230.04714.72
5.3.190.0200.05314.74
5.3.180.0230.04714.64
5.3.170.0200.07314.68
5.3.160.0270.06714.68
5.3.150.0370.04014.77
5.3.140.0200.05314.66
5.3.130.0200.06314.67
5.3.120.0730.07014.66
5.3.110.0230.07014.78
5.3.100.0230.05314.27
5.3.90.0230.06714.17
5.3.80.0270.06014.18
5.3.70.0270.06014.25
5.3.60.0300.05314.29
5.3.50.0130.06014.18
5.3.40.0700.05014.23
5.3.30.1070.04314.16
5.3.20.0370.05313.84
5.3.10.0330.06713.77
5.3.00.0300.06313.72
5.2.170.1370.06011.30
5.2.160.0130.06311.39
5.2.150.0230.03711.26
5.2.140.0170.04311.30
5.2.130.0130.04711.22
5.2.120.0170.04011.38
5.2.110.0130.04711.24
5.2.100.1270.06711.43
5.2.90.0100.05311.27
5.2.80.0830.05311.27
5.2.70.0430.04311.25
5.2.60.0230.05311.28
5.2.50.0200.05711.09
5.2.40.0170.04011.23
5.2.30.0430.03011.22
5.2.20.0100.05011.11
5.2.10.0170.04711.02
5.2.00.0230.05010.85
5.1.60.0170.04710.25
5.1.50.0100.05310.18
5.1.40.0170.03310.23
5.1.30.0100.04010.66
5.1.20.0300.03310.46
5.1.10.0130.04010.18
5.1.00.0330.03010.33
5.0.50.0200.0338.69
5.0.40.0170.0308.51
5.0.30.0000.0538.47
5.0.20.0130.0238.28
5.0.10.0130.0278.26
5.0.00.1070.0408.30
4.4.90.0230.0277.20
4.4.80.0200.0277.20
4.4.70.0030.0307.20
4.4.60.0170.0237.20
4.4.50.0130.0207.20
4.4.40.0070.0407.20
4.4.30.0100.0307.20
4.4.20.0100.0277.20
4.4.10.0100.0277.20
4.4.00.0100.0407.20
4.3.110.0070.0307.20
4.3.100.0100.0277.20
4.3.90.0100.0307.20
4.3.80.0070.0477.20
4.3.70.0170.0237.20
4.3.60.0100.0307.20
4.3.50.1530.0307.20
4.3.40.0230.0437.20
4.3.30.0030.0337.20
4.3.20.0030.0337.20
4.3.10.0070.0237.20
4.3.00.0130.0207.41

preferences:
46.7 ms | 401 KiB | 5 Q