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PHP rand() Randomosity Tester

TIMEOUT
+1,945,877 data
+1 +10 +100 +1K +10K +MAX
range: 1-50,000, data points: 193,943, groups: 45
High / Low / Range / Average
Frequency: 64 / 19 / 45 / 38.79
Rows: 347 / 1 / 346 / 111.11
Frequency
Rows
64
1
63
1
61
3
60
1
59
2
58
6
57
1
56
7
55
15
54
12
53
34
52
38
51
51
50
59
49
73
48
98
47
143
46
167
45
164
44
226
43
232
42
273
41
285
40
305
39
305
38
347
37
335
36
325
35
262
34
254
33
205
32
218
31
140
30
112
29
92
28
67
27
49
26
30
25
22
24
13
23
11
22
5
21
7
20
3
19
1

Test runs: 1,945,878Avg run : 0.000001 seconds Test time: 1.374050 seconds Data Save: 0.676675 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 50,000.

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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