log( "CHILD: url received from parent process", url) Ĭonst browser = await puppeteer. The code snippet below is a simple example of running parallel downloads with Puppeteer.Ĭonst downloadPath = path. You can use it next to puppeteer, puppeteer-core or puppeteer-firefox, interchangeably. 💡 If you are not familiar with how child process work in Node I highly encourage you to give this article a read. browserless is backed by puppeteer, so you need to install it as well. We can combine the child process module with our Puppeteer script and download files in parallel. Child process is how Node.js handles parallel programming. View More, Next Page, Free Download for Pro Subscribers.
We can fork multiple child_proces in Node. Puppeteer and Playwright scripts show faster execution time (close to 20 in E2E scenarios). Our CPU cores can run multiple processes at the same time. Being an end-user product, puppeteer automates several workflows using reasonable defaults that can be customized. As of version 3. When installed, it downloads a version of Chrome, which it then drives using puppeteer-core. To use Puppeteer with Firefox, install the puppeteer package and set its product option to firefox. 💡 Learn more about the single threaded architecture of node here puppeteer puppeteer-core puppeteer is a product for browser automation. Therefore if we have to download 10 files each 1 gigabyte in size and each requiring about 3 mins to download then with a single process we will have to wait for 10 x 3 = 30 minutes for the task to finish. It can only execute one process at a time.
You see Node.js in its core is a single-threaded system. However, if you have to download multiple large files things start to get complicated. In this next part, we will dive deep into some of the advanced concepts.
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