How to run a WebPageTest test
Let's examine the WebPageTest homepage and investigate what all the settings do, including examples of what you can use them for.
Tagged “ramblings”: Page 2
Fixing a legacy HTTP/1.1 server configuration with Cloudflare Workers a CDN
It's amazing what a difference a single little response header can have on web performance. Lets 'fix' it at the edge with a <s>Cloudflare Worker</s> CDN.
Why you should be testing your 404 pages web performance
Your may not think it, but your 404 page is an important part of your potential user journey. You should test its web performance as it can have a big impact on your users experience.
Measuring and examining TLS 1.3, IPv4, and IPv6 performance
TLS 1.3 is the new kid on the cryptographic protocols block. It offers better security and better initial connection web performance. And IPv6 is a 'new' internet protocol. Lets examine some shiny new things!
Bringing HTTP/2 to GOV.UK - Resources
A simple blog post bringing all the resources I used and created in the GOV.UK HTTP/2 work.
Example synthetic web performance monitoring dashboards using SpeedCurve
Custom dashboards and graphs are a really powerful feature of SpeedCurve. Here's a few examples of how we at GDS are using them for synthetic web performance monitoring.
Improving perceived performance with the CSS `font-display` property
The `font-display` property is a great way to tweak the way your fonts load, especially useful as fonts have a large effect on the perceived performance of your website.
The impact of SSL certificate revocation on web performance
SSL certificate revocation is complex, but absolutely necessary. And your choice of what certificate to use for your site is important, and you should consider its impact on web performance when doing so too.
How to read a WebPageTest Connection View chart
There's more to WebPageTest than the Waterfall View. In this post I look at the the 'Connection View' and how it can be used to spot web performance issues.
HTTP/2 and Subresource Integrity don't always get on
Enabling HTTP/2 doesn't always lead to web performance gains. I believe I may have finally solved a mystery of why performance got worse in some cases.
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