Run results for: random contrast

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36

Browser: Chrome 93

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Math.random().toString(36).slice(-5)	3315275.0 Ops/sec
(+new Date).toString(36).slice(-5)	1857315.0 Ops/sec
btoa(Math.random()).slice(0, 5)	1069847.0 Ops/sec
btoa(+new Date).slice(-7, -2)	2213181.0 Ops/sec
btoa(+new Date).substr(-7, 5)	2247551.0 Ops/sec

Script Preparation code:

// Using Math.random and Base 36:
console.log(Math.random().toString(36).slice(-5));

// Using new Date and Base 36:
console.log((+new Date).toString(36).slice(-5));

// Using Math.random and Base 64 (btoa):
console.log(btoa(Math.random()).slice(0, 5));

// Using new Date and Base 64 (btoa):
console.log(btoa(+new Date).slice(-7, -2));
console.log(btoa(+new Date).substr(-7, 5));

Tests:

Math.random().toString(36).slice(-5)
Math.random().toString(36).slice(-5)
(+new Date).toString(36).slice(-5)
(+new Date).toString(36).slice(-5)
btoa(Math.random()).slice(0, 5)
btoa(Math.random()).slice(0, 5)
btoa(+new Date).slice(-7, -2)
btoa(+new Date).slice(-7, -2)
btoa(+new Date).substr(-7, 5)
btoa(+new Date).substr(-7, 5)