A WebAssembly port of xoroshiro128starstar.c using AssemblyScript.
Uses 2 u64 globals for the state so the WebAssembly module does not allocate any pages of memory and is only 262 bytes.
npm install xoroshiro128starstarconst random = require("random");
const SEED = 12345;
random.use(require("xoroshiro128starstar")(SEED));
// log normal distributed random variable
// mu = 0 and sigma = 1
random.logNormal(0, 1);const SEED = 12345;
const Math.random = require("xoroshiro128starstar")(SEED);
function randomInt(start, end) {
return (Math.random() * (end - start + 1) + start) | 0;
}
// returns a uniform random between 0 and 100 inclusive.
randomInt(0, 100);➜ xoroshiro128starstar git:(master) ✗ node --version
v10.3.0
➜ xoroshiro128starstar git:(master) ✗ node --expose-gc bench.js
testing
- wasmrandom (0 <= int < 10)
- mathrandom (0 <= int < 10)
- seedrandom (0 <= int < 10)
running first test, please wait...
frequency
[ '0: 41069751',
'1: 41073989',
'2: 41078799',
'3: 41070726',
'4: 41072933',
'5: 41084158',
'6: 41074424',
'7: 41084506',
'8: 41084073',
'9: 41083843' ]
wasmrandom (0 <= int < 10) ... 81,321,598.18 op/s
frequency
[ '0: 37063747',
'1: 37079010',
'2: 37069394',
'3: 37063328',
'4: 37062678',
'5: 37069730',
'6: 37068098',
'7: 37068668',
'8: 37066801',
'9: 37058401' ]
mathrandom (0 <= int < 10) ... 73,658,101.35 op/s
frequency
[ '0: 11982125',
'1: 11982173',
'2: 11981276',
'3: 11980644',
'4: 11984042',
'5: 11983492',
'6: 11986362',
'7: 11977713',
'8: 11986711',
'9: 11982949' ]
seedrandom (0 <= int < 10) ... 24,057,933.98 op/s
fastest: wasmrandom (0 <= int < 10)