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PHP mt_rand() Randomosity Tester

TIMEOUT
+1,048,576 data
+1 +10 +100 +1K +10K +MAX
range: 1-100,000, data points: 1,048,577, groups: 27
High / Low / Range / Average
Frequency: 26 / 0 / 26 / 10.49
Rows: 12,325 / 5 / 12,320 / 3,703.70
Frequency
Rows
26
5
25
8
24
9
23
28
22
74
21
152
20
268
19
573
18
1,008
17
1,747
16
2,853
15
4,404
14
6,224
13
8,329
12
10,282
11
11,848
10
12,325
9
11,783
8
10,007
7
7,896
6
5,147
5
2,901
4
1,454
3
499
2
149
1
21
0
6

Test runs: 1,048,577Avg run : 0.000001 seconds Test time: 1.308177 seconds Data Save: 3.888832 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 100,000.

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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