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PHP mt_rand() Randomosity Tester

TIMEOUT
+220,804 data
+1 +10 +100 +1K +10K +MAX
range: 1-10, data points: 220,805, groups: 10
High / Low / Range / Average
Frequency: 22,367 / 21,843 / 524 / 22,080.50
Rows: 1 / 1 / 0 / 1.00
Frequency
Rows
22,367
1
22,202
1
22,197
1
22,132
1
22,085
1
22,064
1
22,048
1
21,956
1
21,911
1
21,843
1

Test runs: 220,805Avg run : 0.000006 seconds Test time: 1.422090 seconds Data Save: 0.218372 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 10.

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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