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PHP rand() Randomosity Tester

+1,000 data
+1 +10 +100 +1K +10K +MAX
range: 1-10,000, data points: 444,652, groups: 49
High / Low / Range / Average
Frequency: 73 / 21 / 52 / 44.47
Rows: 625 / 1 / 624 / 204.08
Frequency
Rows
73
1
72
1
70
1
68
3
67
3
66
1
65
11
64
10
63
15
62
23
61
35
60
50
59
51
58
80
57
112
56
136
55
179
54
208
53
211
52
311
51
340
50
424
49
431
48
497
47
575
46
544
45
596
44
625
43
606
42
564
41
541
40
520
39
464
38
382
37
334
36
287
35
214
34
176
33
130
32
104
31
71
30
62
29
27
28
13
27
21
26
3
25
4
24
1
21
2

Test runs: 1,000Avg run : 0.000001 seconds Test time: 0.000509 seconds Data Save: 0.033783 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 10,000.

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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