Monday, April 8th, 2019
loading attribute for images and iframes is coming to Chrome. The best part:
You can also use
loadingas a progressive enhancement. Browsers that support the attribute can get the new lazy-loading behavior with
loading=lazyand those that don’t will still have images load.
Saturday, March 9th, 2019
I like Tim’s definition here:
A performance budget is a clearly defined limit on one or more performance metrics that the team agrees not to exceed, and that is used to guide design and development.
And I agree about the four attributes required for a performance budget to succeed. It must be:
The point is not to let the performance budget try to stand on its own, somewhere hidden in company documentation collecting dust. You need to be proactive about making the budget become a part of your everyday work.
Wednesday, February 20th, 2019
If you really, really have to add Google Analytics to a sites, here’s a way to do it in a more performant way, without the odious Google Tag Manager.
Tuesday, February 19th, 2019
Honestly, cryptocurrencies are useless. They’re only used by speculators looking for quick riches, people who don’t like government-backed currencies, and criminals who want a black-market way to exchange money.
Bruce Schneier on the blockchain:
What blockchain does is shift some of the trust in people and institutions to trust in technology. You need to trust the cryptography, the protocols, the software, the computers and the network. And you need to trust them absolutely, because they’re often single points of failure.
Friday, February 1st, 2019
Following on from that proposal for a browser feature that I linked to yesterday, Tim thinks through all the permutations and possibilities of user agents allowing users to throttle resources:
If a limit does get enforced (it’s important to remember this is still a big if right now), as long as it’s handled with care I can see it being an excellent thing for the web that prioritizes users, while still giving developers the ability to take control of the situation themselves.
Wednesday, January 9th, 2019
When you stop to consider all the implications of poor performance, it’s hard not to come to the conclusion that poor performance is an ethical issue.
Wednesday, December 19th, 2018
Sunday, December 2nd, 2018
Wednesday, November 21st, 2018
The terrific Hugo-winning short story about inequality, urban planning, and automation, written by Hao Jinfang and translated by Ken Liu (who translated The Three Body Problem series).
Hao Jinfang also wrote this essay about the story:
I’ve been troubled by inequality for a long time. When I majored in physics as an undergraduate, I once stared at the distribution curve for American household income that showed profound inequality, and tried to fit the data against black-body distribution or Maxwell–Boltzmann distribution. I wanted to know how such a curve came about, and whether it implied some kind of universality: something as natural as particle energy distribution functions, so natural it led to despair.
Sunday, October 28th, 2018
Harry divides his web performance work into three categories:
I feel like a lot of businesses are still unsure where to even start when it comes to performance monitoring, and as such, they never do. By demystifying it and breaking it down into three clear categories, each with their own distinct time, place, and purpose, it immediately takes a lot of the effort away from them: rather than worrying what their strategy should be, they now simply need to ask ‘Do we have one?’
Tuesday, October 9th, 2018
Great ideas from Addy on where to start with creating a performance budget that can act as a red line you don’t want to cross.
If it’s worth getting fast, it’s worth staying fast.
Monday, October 8th, 2018
When a storm comes, some of the big news sites like CNN and NPR strip down to a zippy performant text-only version that delivers the content without the bells and whistles.
I’d argue though that in some aspects, they are actually better than the original.
The “full” NPR site in comparison takes ~114 requests and weighs close to 3MB on average. Time to first paint is around 20 seconds on slow connections. It includes ads, analytics, tracking scripts and social media widgets.
Meanwhile, the actual news content is roughly the same.
I quite like the idea of storm-driven development.
Wednesday, September 26th, 2018
This is fascinating! A website that’s fast and nimble, not for performance reasons, but to reduce energy consumption. It’s using static files, system fonts and dithered images. And no third-party scripts.
Thanks to a low-tech web design, we managed to decrease the average page size of the blog by a factor of five compared to the old design – all while making the website visually more attractive (and mobile-friendly). Secondly, our new website runs 100% on solar power, not just in words, but in reality: it has its own energy storage and will go off-line during longer periods of cloudy weather.
Ping! That’s the sound of my brain going “service worker!”
I’ve sent them an email offering my help.
Monday, September 24th, 2018
Procedurally generated medieval town plans. Pick a size and then have some fun with the “warp” option.
Thursday, September 6th, 2018
Testing time with Tim.
Long story short, the NOSCRIPT intervention looks like a really great feature for users. More often than not it provides significant reduction in data usage, not to mention the reduction in CPU time—no small thing for the many, many people running affordable, low-powered devices.
Wednesday, September 5th, 2018
This checklist came in very handy during a performance-related workshop I was running today (I may have said the sentence “Always ask yourself What Would Zach Do?”).
- Start Important Font Downloads Earlier (Start a Web Font load)
- Prioritize Readable Text (Behavior while a Web Font is loading)
- Make Fonts Smaller (Reduce Web Font load time)
- Reduce Movement during Page Load (Behavior after a Web Font has loaded)
The first two are really straightforward to implement (with
font-display). The second two take more work (with subsetting and the font loading API).
Monday, August 27th, 2018
Power to the people!
Thursday, August 16th, 2018
A great post by Tim following on from the post by Eric I linked to last week.
Is a secure site you can’t access better than an insecure one you can?
He rightly points out that security without performance is exlusionary.
…we’ve made a move to increase the security of the web by doing everything we can to get everything running over HTTPS. It’s undeniably a vital move to make. However this combination—poor performance but good security—now ends up making the web inaccessible to many.
Security. Performance. Accessibility. All three matter.
Friday, August 10th, 2018
Overwhelmingly, our software is built by well-paid teams with huge monitors and incredibly fast computers running on a high-bandwidth internet connection. We run MacBook Pros, we have cinema displays, we carry iPhones.
That’s not what the rest of the world looks like.