JavaScript API性能对比系列二：深拷贝和浅拷贝性能对比（二）

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JavaScript API性能对比系列二：深拷贝和浅拷贝性能对比-优快云博客

以下是测试性能的环境

CPU	AMD Ryzen 9 5900HX with Radeon Graphics 八核
操作系统	Windows 11 家庭中文版 (64位)
内存	16GB(3200 MHz / 3200 MHz)
Nodejs	v18.16.0

测试四：元素全是对象类型的数组

测试代码

import {cloneDeep, clone} from "lodash-es";

const time = 1000000;
const date = new Date();
const arr = new Array(time).fill(null);
for (let i = 0; i < arr.length; i++) {
    arr[i] = {
        key1: 'string',
        key2: 'string2',
        key3: 'string3',
        key4: 'string4',
        key5: 'string5',
        key6: 'string6',
        key7: 'string7',
        key8: 'string8',
        key9: 'string9',
        key10: 123456789,
        key11: 123456789.12345,
        key12: 12345,
        key13: 12345.12,
        key14: null,
        key15: null,
        key16: undefined,
        key17: undefined,
        key18: {
            key1: '12345,67899,234567',
            key2: true,
            key3: true,
            key4: false,
            key5: null,
            key6: null,
            key7: null,
            key8: null,
            key9: 12345,
            key10: 65432,
        },
        key19: [1, 2, 3, 4, 5, 111, 222, 444.555, 222.11111, 333, 2222],
        key20: date
    };
}

let copy;
console.time('【深拷贝】JSON.parse');
copy = JSON.parse(JSON.stringify(arr));
console.timeEnd('【深拷贝】JSON.parse');

console.time('【深拷贝】lodash-es cloneDeep');
copy = cloneDeep(arr);
console.timeEnd('【深拷贝】lodash-es cloneDeep');

// 自己实现一个深拷贝，不考虑一些特殊场景
function deepClone(source) {
    if (typeof source !== 'object' || source == null) {
        return source;
    }
    const target = Array.isArray(source) ? [] : {};
    for (const key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
            if (typeof source[key] === 'object' && source[key] !== null) {
                target[k