Hide Ads
 Refresh   About   Tools 

PHP rand() Randomosity Tester

+10,000 data
+1 +10 +100 +1K +10K +MAX
range: 1-50, data points: 10,000, groups: 30
High / Low / Range / Average
Frequency: 224 / 171 / 53 / 200.00
Rows: 4 / 1 / 3 / 1.67
Frequency
Rows
224
1
221
1
220
1
215
2
214
1
213
1
212
1
210
2
209
4
208
1
207
3
206
1
205
1
203
1
202
1
201
4
200
1
199
2
197
2
196
4
195
2
193
1
191
1
187
1
186
1
185
4
183
1
182
1
181
2
171
1

Test runs: 10,000Avg run : 0.000000 seconds Test time: 0.004518 seconds Data Save: 0.004617 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

Back to top


Hide Ads