Front-End Performance Checklist 2021

Earlier, performance was not a big concern amongst website owners. However, times have changed now. In fact, it affects everything, including accessibility, usability, SEO. Stellar performance needs quality measurement, monitoring, and a refined approach. Meanwhile, the growing complexity poses new challenges making it hard to track metrics because data vary depending upon device, browser, protocol, network type, and latency.

As you stick with the article, we’ll focus on ways to improve performance. Here’s the checklist that you need to follow in 2021 to experience smooth interaction so that your site neutralizes the drainage of the user’s bandwidth.

Planning and Metrics

Website development company Columbus recommend micro-optimizations for keeping the performance on track, yet don’t forget to define targets- measurable goals throughout the process. Some of the priorities include

Create A Performance Culture

Front-end developers understand the underlying issues. Lack of established endorsement of performance culture breaks up the process. A strong alignment between the development team and the marketing team can sustain long-term performance.

Don’t forget to run performance experiments and measure its outcome on both mobile and desktop. Collect the case study and work on it. Here, performance isn’t enough, and you need some measurable and trackable goals.

Faster Than Your Competitor

Website updates and maintenance team prefers to put your system at least 20% faster than your competitor. Study all the competitors, grab their performance metrics, and set your own threshold to outperform them. For that, you can take help from Chrome UX Report. The reports will be Chrome-specific, yet it will give you a fair distribution.

Understanding the Right Metrics

Not all metrics are important. Make a list of what matters to you and start working on it. This will help you with optimization.

Setting Goal-oriented Target

For a smooth interaction, the interface has 100ms to respond to their user’s input. Any longer may make the user feel laggy. For high-pressure points like animation, you need not do anything where you can and the absolute minimum where you cant.

Remember, each frame of animation should be completed in less than 16 milliseconds, i,e—60 frames per second. You should be pessimistic during performance expectations but optimistic in interface design and use idle time wisely. Additionally, these are for runtime performance but loading performance.

The Environment

Stick to the environment for building as long as you get a good result. Build-up tools like Rollup keep gaining traction, including Snowpack; however, Webpack is more established- hundreds of plug-in are available to optimize the size of the builds. One notable strategy recently applied includes Granular blending with Webpack in Next.js and Gatsby to minimize duplicate code.

Keeping progressive augmentation as the guiding principle of your front-end architecture and deploying it the best thing. Design and build the core experience and enhance the experience with advanced features for capable browsers, developing exceptional experience.

Remember, website Design Company Columbus has one thing to say here. If the site runs fast on a slow machine having a poor screen, a poor browser on a sub-optimal network, it will definitely run faster on a fast system with a good browser and decent network.


Better index an inventory of total assets including JavaScript, images, fonts, third-party scripts, and other modules on the pages such as carousels, multimedia content, and infographics and further split them down in combinations. When optimizing for performance, we need to focus on priorities. Therefore, define your core experience (fully accessible core content), the enhanced experience for browsers (an enriched, full experience), and the extras (assets that aren’t required specifically- web fonts, social media widgets, large images).

Networking & HTTP

When working on the networking, there are a range of things you need to keep in your mind, this includes,

  • OCSP Enabled Stapling

By enabling OCSP (The Online Certificate Status Protocol) stapling, you can speed up your TLS handshakes. OCSP does not need the browser to spend time downloading and searching for certificate information; thereby, reducing the time for the handshake.

  • IPv6

Major mobile networks are now adopting IPv6. Moreover, if you want to secure the future, it’s the right time to update your DNS to IPv6. Remember, the dual-stack support is provided across the network, allowing IPv4 and IPv6 to run simultaneously alongside each other.

  • HTTP/2

Google is pushing towards more secure HTTPS web for the past few years. However, HTTP/2 isn’t perfect and comes with a prioritization issue, yet it’s supported well. Also, HTTPS/2 Server Push is being removed from Chrome; if the implementation depends on Server Push, make sure you do a re-visit. The only advantage of HTTP/2 is that it allows us to send down wire over a single connection.

Testing & Monitoring

Optimize your auditing workflow. This might not look significant, but this saves you time in testing when you have the right setting at your fingertip. Testing is not limited to Chrome and Firefox. Don’t forget to look at how proxy browsers and legacy browser carry their performance. Website updates and maintenance team recommends testing the internet speed of local areas to avoid any big surprise.

Performance Of 404 Pages

Most of the time, we don’t think twice about 404 pages. When the page doesn’t pop up, the server shows 404 pages. But what is important is that most 404 responses are due to missing favicons, WordPress uploads requests, JavaScript requests, and CSS and font files. Check the caching strategy for 404 pages. The intention here is to facilitate HTML to the browser when it demands HTML response and deliver an error for others.

Final Thought

Optimization might sometimes be out of your scope, and that’s all fine. Use a general checklist and create your own list of issues that applies to your context. However, always make sure to test, measure and monitor for better performance. Good Luck!