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PHP rand() Randomosity Tester

+1 data
+1 +10 +100 +1K +10K +MAX
range: 1-100, data points: 10,001, groups: 37
High / Low / Range / Average
Frequency: 126 / 80 / 46 / 100.01
Rows: 6 / 1 / 5 / 2.70
Frequency
Rows
126
1
124
1
121
1
120
1
119
2
117
1
116
2
115
2
113
1
111
5
110
1
109
4
108
3
107
1
106
4
105
2
104
4
103
4
102
3
101
1
100
5
99
5
98
1
97
4
96
6
95
3
94
1
93
1
92
5
91
4
90
5
89
3
88
3
86
3
85
5
82
1
80
1

Test runs: 1Avg run : 0.000010 seconds Test time: 0.000010 seconds Data Save: 0.011700 seconds Test Tools: Restart test: Random range 1 to: 1 2 3 4 5 10 50 100 500 1K 5K 10K 50K 100K Random Generator Method: SQLite ORDER BY RANDOM() PHP rand() PHP mt_rand() PHP random_int() Back to top

About the Randomosity Tester

This page tests the frequency distribution and timing of random number generation via these methods:

Random number results are stored in a test table. The test table is defined as:

CREATE TABLE 'test' ( 'id' INTEGER PRIMARY KEY, 'frequency' INTEGER DEFAULT '0' );

The table is initialized by creating all rows with frequency = 0. The number of rows in the table is defined by the range setting. The current test is set to use range: 1 to 100.

For each random number chosen, the table is updated via:

UPDATE test SET frequency = frequency + 1 WHERE id = :random_number

For SQLite tests, results are individually generated via the SQL call:

SELECT id FROM test ORDER BY RANDOM() LIMIT 1;

Generate more random numbers by clicking a  +  number button to start a test run.

Each test run is limted to ~1.42 seconds.

A Frequency of Frequencies chart displays:

This site was created with Open Source software. Find out more on Github: randomosity-tester v0.2.2

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