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PHP rand() Randomosity Tester

+10,000 data
+1 +10 +100 +1K +10K +MAX
range: 1-1,000, data points: 13,142, groups: 23
High / Low / Range / Average
Frequency: 27 / 4 / 23 / 13.14
Rows: 119 / 1 / 118 / 43.48
Frequency
Rows
27
1
25
1
24
3
23
4
22
3
21
13
20
17
19
32
18
37
17
51
16
79
15
99
14
104
13
119
12
101
11
95
10
93
9
58
8
47
7
22
6
14
5
3
4
4

Test runs: 10,000Avg run : 0.000001 seconds Test time: 0.012865 seconds Data Save: 0.066803 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 1,000.

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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