PHP mt_rand() Randomosity Tester

TIMEOUT

+908,941 data

+1 +10 +100 +1K +10K +MAX
range: 1-100, data points: 908,942, groups: 91
High / Low / Range / Average
Frequency: 9,375 / 8,825 / 550 / 9,089.42
Rows: 2 / 1 / 1 / 1.10

9,375

9,336

9,302

9,298

9,289

9,242

9,213

9,212

9,211

9,209

9,206

9,205

9,193

9,188

9,182

9,181

9,177

9,175

9,168

9,167

9,164

9,163

9,158

9,156

9,154

9,151

9,150

9,149

9,148

9,147

9,139

9,137

9,131

9,129

9,124

9,123

9,120

9,119

9,116

9,115

9,110

9,107

9,098

9,090

9,089

9,088

9,080

9,079

9,078

9,077

9,075

9,070

9,069

9,065

9,061

9,056

9,054

9,047

9,042

9,041

9,037

9,031

9,028

9,027

9,024

9,021

9,019

9,015

9,013

9,012

9,010

9,009

9,008

9,006

9,005

9,004

8,992

8,991

8,984

8,981

8,976

8,975

8,974

8,971

8,966

8,963

8,952

8,945

8,926

8,924

8,825

Test runs: 908,942Avg run : 0.000002 seconds Test time: 1.430974 seconds Data Save: 0.195282 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:

SQLite ORDER BY RANDOM()
PHP rand()
PHP mt_rand()
PHP random_int()

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:

Frequency: the list of unique frequencies (the number of times a row was randomly selected)
Rows: the number of rows for each frequency present

This site was created with Open Source software. Find out more on Github: randomosity-tester v0.2.2

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