Speed Up Your PDF Generation with Puppeteer in Node.js скачать в хорошем качестве

Speed Up Your PDF Generation with Puppeteer in Node.js

Discover how to accelerate PDF generation in Node.js using Puppeteer, helping your application perform faster and more efficiently. --- This video is based on the question https://stackoverflow.com/q/66748197/ asked by the user 'Albert Alberto' ( https://stackoverflow.com/u/9087548/ ) and on the answer https://stackoverflow.com/a/66748541/ provided by the user 'rockingskier' ( https://stackoverflow.com/u/682968/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Node js speed up puppeteer html to pdf Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Speed Up Your PDF Generation with Puppeteer in Node.js: A Comprehensive Guide In the world of web applications, generating PDFs dynamically can be a vital feature. However, it often comes with its own set of challenges, particularly when it comes to speed. If you're using Node.js along with Puppeteer to create PDFs, you might face situations where the generation process takes an unexpectedly long time. One common scenario is needing to produce a PDF file of about 100 KB, which can take around 10 seconds to complete. Fortunately, there's a way to significantly speed up this process. In this guide, we will explore effective strategies to optimize your PDF generation workflow, focusing specifically on sharing a single browser instance to avoid the overhead of launching a browser for every request. The Problem: Slow PDF Generation When your Node.js application needs to generate a PDF file, the typical approach involves launching a headless browser instance using Puppeteer, creating a new page, loading the HTML content, and finally, generating the PDF. However, the time taken for this workflow can be a bottleneck—especially if multiple users are requesting PDFs simultaneously. Launching a new browser instance for every single request can be inefficient. The Solution: Reusing Browser Instances To drastically reduce the time for PDF generation, you can modify your implementation to reuse a single browser instance for multiple PDF requests. By doing so, you avoid the overhead of launching a new browser for each request, leading to faster response times. Below, we’ll break down the changes needed to implement this solution. Step 1: Create a Utility for Browser Instance Management First, we’ll create a utility function that will handle the creation of the page and manage the browser instance. This reusable function will ensure that you only launch a browser once and then reuse the same page across multiple PDF generation requests. Here’s how to set it up: [[See Video to Reveal this Text or Code Snippet]] Step 2: Update Your PDF Generation Logic Now that you have a utility function for managing the browser instance, you can update your existing downloadPDF function to utilize this utility: [[See Video to Reveal this Text or Code Snippet]] Benefits of This Approach Implementing this solution comes with several notable advantages: Reduced Latency: By reusing the browser and page, you can significantly reduce the time taken for PDF generation. Enhanced Performance: Your application can handle more concurrent PDF requests without straining system resources. Scalability: As your application grows, this pattern of reusing resources helps maintain performance. Conclusion Incorporating these optimizations in your Node.js application using Puppeteer can lead to faster and more responsive PDF generation. By launching a headless browser only once and reusing the page for each request, you can reduce the overhead associated with PDF generation, providing a better experience for your users. Now, implement these changes and see the improvement in speed firsthand. Happy coding!