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'use strict'; const common = require('../common.js'); const assert = require('assert'); const bench = common.createBenchmark(main, { method: [ 'object', 'nullProtoObject', 'nullProtoLiteralObject', 'storageObject', 'fakeMap', 'map', ], n: [1e6] }); function runObject(n) { const m = {}; bench.start(); for (var i = 0; i < n; i++) { m[`i${i}`] = i; m[`s${i}`] = String(i); assert.strictEqual(String(m[`i${i}`]), m[`s${i}`]); m[`i${i}`] = undefined; m[`s${i}`] = undefined; } bench.end(n); } function runNullProtoObject(n) { const m = Object.create(null); bench.start(); for (var i = 0; i < n; i++) { m[`i${i}`] = i; m[`s${i}`] = String(i); assert.strictEqual(String(m[`i${i}`]), m[`s${i}`]); m[`i${i}`] = undefined; m[`s${i}`] = undefined; } bench.end(n); } function runNullProtoLiteralObject(n) { const m = { __proto__: null }; bench.start(); for (var i = 0; i < n; i++) { m[`i${i}`] = i; m[`s${i}`] = String(i); assert.strictEqual(String(m[`i${i}`]), m[`s${i}`]); m[`i${i}`] = undefined; m[`s${i}`] = undefined; } bench.end(n); } function StorageObject() {} StorageObject.prototype = Object.create(null); function runStorageObject(n) { const m = new StorageObject(); bench.start(); for (var i = 0; i < n; i++) { m[`i${i}`] = i; m[`s${i}`] = String(i); assert.strictEqual(String(m[`i${i}`]), m[`s${i}`]); m[`i${i}`] = undefined; m[`s${i}`] = undefined; } bench.end(n); } function fakeMap() { const m = {}; return { get(key) { return m[`$${key}`]; }, set(key, val) { m[`$${key}`] = val; }, get size() { return Object.keys(m).length; }, has(key) { return Object.prototype.hasOwnProperty.call(m, `$${key}`); } }; } function runFakeMap(n) { const m = fakeMap(); bench.start(); for (var i = 0; i < n; i++) { m.set(`i${i}`, i); m.set(`s${i}`, String(i)); assert.strictEqual(String(m.get(`i${i}`)), m.get(`s${i}`)); m.set(`i${i}`, undefined); m.set(`s${i}`, undefined); } bench.end(n); } function runMap(n) { const m = new Map(); bench.start(); for (var i = 0; i < n; i++) { m.set(`i${i}`, i); m.set(`s${i}`, String(i)); assert.strictEqual(String(m.get(`i${i}`)), m.get(`s${i}`)); m.set(`i${i}`, undefined); m.set(`s${i}`, undefined); } bench.end(n); } function main({ n, method }) { switch (method) { case '': // Empty string falls through to next line as default, mostly for tests. case 'object': runObject(n); break; case 'nullProtoObject': runNullProtoObject(n); break; case 'nullProtoLiteralObject': runNullProtoLiteralObject(n); break; case 'storageObject': runStorageObject(n); break; case 'fakeMap': runFakeMap(n); break; case 'map': runMap(n); break; default: throw new Error(`Unexpected method "${method}"`); } }