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function memoryUsed() { | |
gc(); | |
const mbUsed = process.memoryUsage().heapTotal / 1024 / 1024; | |
return mbUsed; | |
} | |
function getRandomString() { | |
// stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript | |
return ( | |
Math.random().toString(36).substring(2, 15) + | |
Math.random().toString(36).substring(2, 15) | |
); | |
} | |
function getRandomSmallIntegerString(max) { | |
return Math.floor(Math.random() * max).toString(); | |
} | |
function getRandomNumericString() { | |
return Math.random().toString(); | |
} | |
const randomKeyByType = { | |
"string-key": getRandomString, | |
"numeric-key": getRandomNumericString, | |
"integer-key": (max) => getRandomSmallIntegerString(max), | |
}; | |
const sizes = [ 10000, 50000, 100000, 500000, 1000000]; | |
const memoryUsage = {'object': {}, map: {}}; | |
const createByType = { object: createObject, map: createMap}; | |
function fn() { | |
["object", "map"].forEach((type) => { | |
sizes.forEach((size) => { | |
Object.keys(randomKeyByType).forEach((randomKeyType) => { | |
gc(); | |
const getRandomKey = randomKeyByType[randomKeyType] | |
const before = memoryUsed(); | |
const obj = createByType[type](getRandomKey, size); | |
const after = memoryUsed(); | |
const diff = after - before; | |
if (!memoryUsage[type][randomKeyType]) {memoryUsage[type][randomKeyType] = {}} | |
memoryUsage[type][randomKeyType][size] = diff; | |
gc(); | |
}); | |
}); | |
}); | |
} | |
fn(); | |
console.log(memoryUsage); | |
function createObject(getRandomKey, width) { | |
const obj = {}; | |
for (let i = 0; i < width; i++) { | |
obj[getRandomKey(width)] = {}; | |
} | |
return obj; | |
} | |
function createMap(getRandomKey, width) { | |
const map = new Map(); | |
for (let i = 0; i < width; i++) { | |
map.set(getRandomKey(width), i); | |
} | |
return map; | |
} |
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