The 2 main performance debts of HTTP/1
HTTP/2 is already around since 2015. Heck, HTTP/3 even got standardized as of June 6th 2022. So why even bother talking about HTTP/1?
Pagespeed findings
Can't get enough? I'm regularly sharing snack bite tips and advice on LinkedIn as well.
Pagespeed best practices guide for using custom or Google fonts
We all get that woff2 is smaller than woff, or ditching custom fonts comes with best performance. But what are considerations if you really want to use custom fonts?
Still using WebFontLoader to load (Google) Fonts? Don't!
If you're concerned about the loading experience of your custom fonts, you might have run into the WebFontLoader. A 10 year old library. Should you still use it today.
One second image LCP booster: meet the fetchpriority attribute
If optimizing was only as simple as adding a few attributes. But this time, it really is and it's even easier to use than image preloading.
Interaction to Next Paint: WP and SPA's like PWA
So, FID is only tracking delay during first interaction and didn't come with real nuances per stack. But what about the new INP metric and WP, Magento or SPA's?
New JS metric: Meet Interaction to Next Paint (INP) metric
"Interaction to Next Paint", INP for short, measures the time between a user interaction (click, tab, type) and basically the visual feedback to a user. And it should be below 200ms.
Reducing response time with server side caching
Server side caching means that some form of caching is done server side. And from a pagespeed perspective, it makes most sense to do this for contents that tends to be dynamic. Let's dive into the basics of server side caching a bit more.
Plugins to improve your website or shop's pagespeed
In general, people know that I'm not the one to ask which plugins to use for their stack. However, given the fact that I'm a pagespeed and performance enthousiast, I'm sometimes asked which plugins people should be using.
3 similarities between pagespeed and accessibility
While two completely different things, there actually is a correlation between pagespeed and accessibility.
What the setup of my pagespeed cases look like
Even clients that are convinced they should work with me, still want to know how a collaboration and an auditing trajectory is going to look like. This article is giving background information.
Parsing and rendering process simplified
We've all heard of the 'eliminate render blocking resources' recommendation in Lighthouse. But to understand why it is important to fix this, it first is convenient to know a few basic principles of browsers.
Improving a CDN's cache hit ratio
A platform can take a long time to generate a webpage. But when the content is cached, TTFB and users will benefit, but the first user accessing new contents will pay a penalty. How to prevent this and improve the cache hit ratio?
Improve PageSpeed with 2x a single line of CSS
Rarely can you increase your PageSpeed with a single line of CSS. Today, though, I will share two separate CSS lines of code that will improve pagespeed and performance.
Don't use Page Load Time to predict conversion
I've seen pagespeed audits where Google Analytics' Average Page Load Time was used to determine bad performing pages and claiming the webshop was missing revenue. However, pagespeed is more nuanced.
Improving WordPress performance: an open letter
WordPress started a performance team to improve its Core Web Vitals scores. I read their pagespeed optimization spreadsheet and boy do I have an opinion regarding their performance backlog.
Click, tap and type: FID metric to change in 2022
Google hasn't been sitting still. Both LCP and CLS have been seeing drastic changes already, so why not changing the FID metric?
HTTP Archive meets Core Web Vitals: Technology Report
I've been sharing charts of Core Web Vitals passing platforms recently, so here's the shared source of truth for the way websites are both built and experienced.
Why Wordpress is not correct to blame jQuery for bad pagespeed
Wordpress recently wrote about the performance impact of jQuery, but it seems like they are choosing to not call out the real pagespeed bottleneck.
Twitter stops linking to AMP pages
There is nothing wrong with the mindset of AMP. However, news publishers felt forced to start using Google's AMP HTML framework for their articles for SEO reasons while you could achieve same pagespeed results without AMP.
Unexpected? Not really: new layout for PageSpeed Insights
If you're looking for PageSpeed Insights, you now get redirected to their new testing environment: The PageSpeed Insights layout has changed as of today.