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SQLite ORDER BY RANDOM() Randomosity Tester

TIMEOUT
+21,405 data
+1 +10 +100 +1K +10K +MAX
range: 1-50, data points: 22,406, groups: 39
High / Low / Range / Average
Frequency: 497 / 407 / 90 / 448.12
Rows: 3 / 1 / 2 / 1.28
Frequency
Rows
497
1
489
1
478
1
477
2
475
1
474
1
473
1
471
1
470
1
469
1
467
1
465
1
463
2
462
3
461
1
460
1
457
2
456
1
454
1
450
1
449
1
447
2
446
1
444
1
440
1
439
2
437
1
435
1
434
1
429
1
428
1
427
2
422
1
419
1
418
2
417
2
413
1
411
1
407
2

Test runs: 21,406Avg run : 0.000066 seconds Test time: 1.418996 seconds Data Save: 0.023123 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 50.

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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