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PHP mt_rand() Randomosity Tester

+10,000 data
+1 +10 +100 +1K +10K +MAX
range: 1-100, data points: 10,000, groups: 36
High / Low / Range / Average
Frequency: 125 / 73 / 52 / 100.00
Rows: 6 / 1 / 5 / 2.78
Frequency
Rows
125
1
119
2
118
1
116
1
114
5
113
3
112
3
110
2
109
3
108
2
107
6
106
4
105
3
104
5
103
4
102
3
101
2
100
4
99
3
98
3
96
4
95
3
94
2
93
3
92
4
91
5
90
4
89
4
88
2
86
1
85
3
83
1
81
1
79
1
75
1
73
1

Test runs: 10,000Avg run : 0.000000 seconds Test time: 0.004327 seconds Data Save: 0.004668 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.

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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