Performance Engineering Blog

Impact of 3G vs 4G Connections on User Experience across Countries

Nov 28, 2017

It is no secret that the faster the user's internet connection is, the faster the website will load. It is a crucial factor in the success of a business, but one that it can not directly control (long live #netneutrality). It is also hard to quantify how connection speeds directly affect user experience, and consequently important business metrics such as bounce rate. In this post, we use Chrome User Experience Report to analyze the impact of internet speed on real-world user experience.

Chrome User Experience Report Explained with Google BigQuery

Nov 27, 2017

Google recently announced Chrome User Experience Report (CrUX), consisting data from the usage of 10,000 websites in Google Chrome. In this post, we will further explain the report, its importance to businesses and the potential pitfalls when analyzing the data.

HTTP/2 PUSH vs HTTP Preload

Nov 18, 2017

HTTP/2 PUSH is a feature which lets server pre-emptively push resources to the client (without a corresponding request). HTTP Preload is a way to indicate to the browser resources it would require while loading the current page. In this post, we will discuss the key differences between PUSH and Preload, with a detailed explanation of which one to choose based on your use case.

Native HTTP/2 support in Node frameworks - Hapi, Koa, Express and more

Nov 5, 2017

In this post, we will track the native HTTP/2 support status in some of the most popular Node frameworks. We will also provide examples of how to implement static file server where possible.

How to create a zero dependency HTTP/2 static file server with Node.js (with examples)

Oct 28, 2017

Node.js just launched support (v8.8.1) for HTTP/2 as part of their core. In this post, we will create a simple HTTP/2 server to serve static files and then demonstrate some cool features like HTTP/2 PUSH.

Why Brotli Adoption is so Low Among Websites

Dec 29, 2016

Brotli is a new compression method for text based assets poised to dethrone the king of compression on the web (gzip) soon. It is already being used internally as part of the WOFF2 font format but recently browsers have exposed it as a compression method to compress other assets like your HTML, JavaScript, CSS, SVG, etc.

Beyond Offline: Other Interesting Use Cases with Service Workers

Jul 14, 2016

Service workers is probably the single most powerful API added to the web platform recently. It gives you access to a programmable proxy in JavaScript land. You can do anything you want with each request made and the response received by the browser - cancel the request, re-route it, modify the response(in some cases), cache it, etc.

Impact of metadata on Image Performance

Jul 1, 2016

In this post, we will specifically focus on the different kinds of metadata stored in JPEG images and the impact this has on performance of a webpage.

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Impact of 3G vs 4G Connections on User Experience across Countries

Chrome User Experience Report Explained with Google BigQuery

HTTP/2 PUSH vs HTTP Preload

Native HTTP/2 support in Node frameworks - Hapi, Koa, Express and more

How to create a zero dependency HTTP/2 static file server with Node.js (with examples)

Why Brotli Adoption is so Low Among Websites

Beyond Offline: Other Interesting Use Cases with Service Workers

Impact of metadata on Image Performance

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