Blackbird

Blackbird measures your ecommerce site speed and shows you the impact it has on sales. Try free for 30 days.

[Brodie Clark @brodieseo]

Impressive read on how a few tweaks could more than halve the load time for a fashion retailer.

Plenty of practical advice included, which I would highly recommend checking out.

-> Improving Page Speed for Norse Projects by @davepeiris via @tryblackbird https://t.co/8lsSIS7Ppr

[Harry Roberts @csswizardry]

Simple yet significant thing all developers should keep in mind: CSS resources (fonts, background images) are not requested by your CSS, but by the DOM node that needs them [Note: slight oversimplification, but the correct way to think about it.]

[Blackbird @tryblackbird]

From today, Blackbird has switched over to the new method of tracking Cumulative Layout Shift, so your data should be similar to Google's tooling too

[Chrome for Developers @ChromiumDev]

Starting today, a CLS change that better accounts for long-lived pages has been rolled out across a number of Chrome's web tooling surfaces including @____lighthouse, PageSpeed Insights, and @ChromeUXReport ✨

https://t.co/wcmGtCrn0y

[Blackbird @tryblackbird]

If you're using polyfills to ensure your site works for older browsers, you can use nomodule to save modern browsers having to download that script: https://t.co/K0wjJX3CBk

[Dave Peiris @davepeiris]

I found some web performance issues with Tesla's Cybertruck page, and then spent longer than I want to admit on this: https://t.co/XikPFvY1N4

[Blackbird @tryblackbird]

Amazing work from the Jewellerybox team!

[Blackbird @tryblackbird]

Big fan of the UI update to WebPageTest - really great, clean design, and super useful to see FCP, LCP and layout shifts in the waterfall

[Ranks.com @ranks_com]

Issue 114: Blending Data & Lessons Learned

Post of the Week 🔥
@AndrewCMiller

Sponsor 💪
@contentking

Featuring 👇
@ItamarBlauer
@tryblackbird
@tomcritchlow
@marysryu
@NickLeRoy
@wissi_analytics

👉 https://t.co/TG31tk8kOu

[Blackbird @tryblackbird]

@TheWeeklySEO @AndrewCMiller @contentking @ItamarBlauer @tomcritchlow @marysryu @NickLeRoy @wissi_analytics Thanks for including us!

[Blackbird @tryblackbird]

Learn how to use Local Overrides to test site speed changes quickly, without having to involve your dev team: https://t.co/EbsMIeYeeO

[Harry Roberts @csswizardry]

📱 Ever had to test site-speed in iOS Safari? It’s pretty straightforward once you have it all set up: https://t.co/VmSHnhPlR7

[Smashing Magazine 🇺🇦 🏳️‍🌈 @smashingmag]

Core Web Vitals and SEO:

"The update on May 31 (2021) will result in a positive ranking signal for page experience in mobile search only for groups of similar URLs which meet all three Web Vital targets. The impact of the signal is expected to be small.”

https://t.co/NUYqHvqIYb

[Dave Peiris @davepeiris]

💌 The first Making Websites Fast email has just gone out, with useful articles from @csswizardry, @ksylor, @simonhearne, @addyosmani and @smashingmag

⚡️ If you’re into site speed, this is for you: https://t.co/gcNQLOOTvO

You can sign up for more here: https://t.co/2IqucYbP4e

[Matt Hobbs (@[email protected]) @TheRealNooshu]

If anyone missed my talk about "How to read a WebPageTest waterfall chart" from @LDNWebPerf on Tuesday, it's now been uploaded to YouTube: https://t.co/JWEz39RIO9

#webperf #perfmatters

[Dave Peiris @davepeiris]

If you're into site speed (or want to be better at it), then you might like the new monthly newsletter I'm putting together, Making Websites Fast, showcasing the best of web perf: https://t.co/2IqucYbP4e

[Blackbird @tryblackbird]

This is a really, really great listen - lots of useful info including how HTTP/2 really works, the hidden cost of JavaScript frameworks, and why custom metrics in #webperf are so important.

[Harry Roberts @csswizardry]

🎙 I had a really, really great time chatting with @drewm for @SmashingPod. We take a look at the state of web performance in 2021, and I’d highly recommend you give it a listen! https://t.co/UoFipQ7m8G

[Harry Roberts @csswizardry]

🧵 Two of my most- and first-used checks when doing a performance audit are surprisingly old school: 1) Validate HTML 2) Disable JS.

[Blackbird @tryblackbird]

Understanding the critical path is a huge step towards improving your ecommerce site speed

Load your CSS as fast as possible
Be careful with synchronous JavaScript in the <head>
Self-host critical CSS, JS and fonts

https://t.co/j6rx75MAUa

[Blackbird @tryblackbird]

Speed metrics like LCP are great, but there could be things that are more important for you to track (like when the first product image loads on your ecom category pages). Here's how to track your own custom speed metrics: https://t.co/jFxP9w6ISV

[Simon Hearne @simonhearne]

So much #webperf goodness here. I'm *especially* excited about f-mods and the potential to prevent layout shifts on font swaps 💖