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PHP mt_rand() Randomosity Tester

+1,000 data
+1 +10 +100 +1K +10K +MAX
range: 1-50, data points: 11,011, groups: 32
High / Low / Range / Average
Frequency: 263 / 185 / 78 / 220.22
Rows: 4 / 1 / 3 / 1.56
Frequency
Rows
263
1
260
1
250
1
247
1
243
1
238
3
236
1
234
1
233
1
231
2
229
1
227
3
226
1
222
4
221
1
219
2
218
2
217
1
216
1
215
1
213
1
212
2
211
3
210
3
209
3
205
1
203
2
202
1
197
1
192
1
188
1
185
1

Test runs: 1,000Avg run : 0.000000 seconds Test time: 0.000431 seconds Data Save: 0.029805 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.

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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