stringify perf test

var fastSafeStringify = require('fast-safe-stringify');
var fastJsonStringify = require('fast-json-stringify');
var fastStableStringify = require('fast-stable-stringify');

const object = {
    foo: "bar",
    number: 12345,
    bool: true,
    name: "some really long string",
    message: "this is really weird"
};

const scheme = {
    type: 'object',
    properties: {
        foo: {type: "string"},
        name: {type: "string"},
        message: {type: "string"},
        number: {type: "number"},
        bool: {type: "boolean"}
    }
};

const count = 1000 * 1000;

console.time('JSON.stringify');
for (let i = 0; i < count; i++) {
    JSON.stringify(object);
}
console.timeEnd('JSON.stringify');

console.time('fastSafeStringify');
for (let i = 0; i < count; i++) {
    fastSafeStringify(object);
}
console.timeEnd('fastSafeStringify');

console.time('luhaStringify');
for (let i = 0; i < count; i++) {
    luhaStringify(object);
}
console.timeEnd('luhaStringify');

console.time('fastStableStringify');
for (let i = 0; i < count; i++) {
    fastStableStringify(object);
}
console.timeEnd('fastStableStringify');

console.time('fastJsonStringify');
const fastJsonStringifyFn = fastJsonStringify(scheme);
for (let i = 0; i < count; i++) {
    fastJsonStringifyFn(object);
}
console.timeEnd('fastJsonStringify');

function luhaStringify(object) {
    if (object) {
        let first = true;
        let str = "{";

        for (let key of Object.keys(object)) {
            if (first) {
                str += '"' + key + '"'; //`"${key}": `
                first = false;
            } else {
                str += ', "' + key + '": ';  // `, "${key}": `
            }

            if (typeof object[key] === 'string') {
                str += '"' + object[key] + '"'; //`"${object[key]}"`;
            } else {
                str += object[key].toString(); // `${object[key]}`;
            }
        }

        return str + "}";
    } else {
        throw new Error(`Cannot stringify empty object`);
    }
}