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PHP rand() Randomosity Tester

+10,000 data
+1 +10 +100 +1K +10K +MAX
range: 1-100,000, data points: 1,133,597, groups: 30
High / Low / Range / Average
Frequency: 29 / 0 / 29 / 11.34
Rows: 11,785 / 2 / 11,783 / 3,333.33
Frequency
Rows
29
4
28
2
27
5
26
7
25
20
24
51
23
87
22
187
21
323
20
613
19
1,012
18
1,792
17
2,870
16
4,207
15
6,038
14
7,878
13
9,694
12
11,312
11
11,785
10
11,590
9
10,034
8
8,170
7
5,751
6
3,428
5
1,927
4
826
3
293
2
80
1
8
0
6

Test runs: 10,000Avg run : 0.000000 seconds Test time: 0.003070 seconds Data Save: 0.176708 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 100,000.

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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