'use strict';

const common = require('../common.js');

const util = require('util');

const v8 = require('v8');

const bench = common.createBenchmark(main, {

type: ['extend', 'assign'],

n: [10e4]

});

function main(conf) {

let fn;

const n = conf.n | 0;

let v8command;

if (conf.type === 'extend') {

fn = util._extend;

v8command = '%OptimizeFunctionOnNextCall(util._extend)';

} else if (conf.type === 'assign') {

fn = Object.assign;

// Object.assign is built-in, cannot be optimized

v8command = '';

}

// Force-optimize the method to test so that the benchmark doesn't

// get disrupted by the optimizer kicking in halfway through.

for (var i = 0; i < conf.type.length * 10; i += 1)

fn({}, process.env);

v8.setFlagsFromString('--allow_natives_syntax');

eval(v8command);

var obj = new Proxy({}, { set: function(a, b, c) { return true; } });

bench.start();

for (var j = 0; j < n; j += 1)

fn(obj, process.env);

bench.end(n);

}