now I use puppeteer to crawl data on a web page. I need chrome,. Every time I finish crawling data, chrome takes up a lot of cpu and memory, as shown in the following figure:

my code is as follows:
const puppeteer = require ("puppeteer");
(async () = > {

const browser = await puppeteer.launch({
    args: ["--no-sandbox"],
    dumpio: false
});

const page = await browser.newPage();

await page.goto("https://book.douban.com/chart");

try {
    let issue = await page.$eval("div.main > div.wrap > ul.lot-award > li.currentAward > div.period > span ",el => el.innerHTML);
    let num = await page.$eval("div.main > div.wrap > ul.lot-award > li.currentAward > -sharpNum.lot-nums ",el => el.innerHTML);
    let num1 = num.replace(/ /g, "");

    let num2 = num1.replace(/[\@\-sharp\$\%\^\&\*\(\)\{\}\:\"\L\<\>\?\[\]]/g,"");
    
    let num3 = num2.replace(/spanclass/g,"").replace(/span/g,"").replace(/no/g,"").replace(/=/g,"");
    let num4 = num3.substring(0,num3.length - 1);
    let num5 = num4.split("/");
    console.log(num3);
    console.log(num4);
    console.log(num5);
    console.log(issue);
} catch (err) {
    console.log("pid: ",process.pid," :"," : \r\n ",err.stack)
} finally {
    browser.close(); // 
}

}) ();

excuse me, what should I do? Do you gods have any good methods or ideas? Thank you!