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'use strict'; const common = require('../common.js'); const assert = require('assert'); const bench = common.createBenchmark(main, { method: ['swap', 'destructure'], n: [1e8] }); function runSwapManual(n) { var x, y, r; bench.start(); for (var i = 0; i < n; i++) { x = 1, y = 2; r = x; x = y; y = r; assert.strictEqual(x, 2); assert.strictEqual(y, 1); } bench.end(n); } function runSwapDestructured(n) { var x, y; bench.start(); for (var i = 0; i < n; i++) { x = 1, y = 2; [x, y] = [y, x]; assert.strictEqual(x, 2); assert.strictEqual(y, 1); } bench.end(n); } function main({ n, method }) { switch (method) { case '': // Empty string falls through to next line as default, mostly for tests. case 'swap': runSwapManual(n); break; case 'destructure': runSwapDestructured(n); break; default: throw new Error(`Unexpected method "${method}"`); } }