Editing 在100万个key里查找300个key存在情况

<!DOCTYPE html>
<html>

<head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta charset="utf-8" />
    <title>在100万个key里查找300个key存在情况</title>
</head>

<body>
    <button class="flag-init">初始化数据（先点击一次）</button>
    <button class="flag-object">Object in（可多次点击）</button>
    <button class="flag-array">Array includes（可多次点击）</button>
</body>

</html>

let nr = {
    tsKeyObject: {},
    tsKeyArray: [],
    init: (num = 1000000) => {
        if (nr.tsKeyArray.length == 0) {
            console.debug(`正在构建 ${num} 条数据`);
            console.time();
            for (let i = 0; i < num; i++) {
                let item = nr.UUID();
                nr.tsKeyObject[item] = true;
                nr.tsKeyArray.push(item);
            }
            console.timeEnd();
        }
    },
    findObject: () => {
        if (nr.tsKeyArray.length) {
            console.time();
            let data = nr.newData();
            let result = {};
            data.forEach(item => {
                result[item] = item in nr.tsKeyObject;
            });
            console.debug('find object (fast)', result)
            console.timeEnd();
        }
    },
    findArray: () => {
        if (nr.tsKeyArray.length) {
            console.time();
            let data = nr.newData();
            let result = {};
            data.forEach(item => {
                result[item] = nr.tsKeyArray.includes(item);
            });
            console.debug('find array (slow)', result)
            console.timeEnd();
        }
    },
    newData: (num = 300) => {
        let data = [];
        for (let i = 0; i < num; i++) {
            data.push(nr.UUID());
        }
        return data;
    },

    UUID: () => window["crypto"] && window["crypto"]["randomUUID"] ? crypto.randomUUID() : URL.createObjectURL(new Blob([])).split('/').pop(),
}

document.querySelector(".flag-init").addEventListener("click", function () {
    nr.init();
});
document.querySelector(".flag-object").addEventListener("click", function () {
    nr.findObject();
});
document.querySelector(".flag-array").addEventListener("click", function () {
    nr.findArray();
});