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PHP mt_rand() Randomosity Tester

TIMEOUT
+754,800 data
+1 +10 +100 +1K +10K +MAX
range: 1-100,000, data points: 754,801, groups: 23
High / Low / Range / Average
Frequency: 22 / 0 / 22 / 7.55
Rows: 14,667 / 3 / 14,664 / 4,347.83
Frequency
Rows
22
3
21
4
20
9
19
26
18
52
17
132
16
293
15
570
14
1,192
13
2,250
12
3,749
11
5,909
10
8,509
9
11,894
8
13,566
7
14,667
6
13,458
5
10,880
4
7,103
3
3,788
2
1,493
1
391
0
62

Test runs: 754,801Avg run : 0.000001 seconds Test time: 1.106648 seconds Data Save: 2.198862 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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