Zach’s ugly mug (his face) Zach Leatherman

Use speedlify’s AvatarSpeedlify to Continuously Measure Site Performance

June 29, 2020 #15 Popular

When launching a brand new web site, it’s fairly common to run testing tools to ensure that the site is fast and follows best practices. One popular tool to accomplish these goals is Google’s Lighthouse. It works great and is pretty comprehensive.

Here are some of the ways I’ve used Lighthouse to help test my sites:

Instantaneous measurement is a good first step. But how do we ensure that the site maintains good performance and best practices when deploys are happening every day? How do we keep the web site fast? The second step is continuous measurement. This is where Speedlify comes in. It’s an eleven_ty’s AvatarEleventy-generated web site published as an open source repository to help automate continuous performance measurements.

Source Code

  • Speedlify on GitHub

  • DIY: Run it manually, locally on your computer and check in the data to your repo.

  • Automated: If you want to automate it, Speedlify can run entirely self-contained on Netlify. Be aware that there’s a maximum of 15 minutes per build (if you do 3 runs each, I’d guess this will let you test a maximum of around 20 pages). Netlify’s free tier gives you 300 build minutes per month.

A very zoomed out screenshot of Speedlify

Next Steps

Speedlify is intended as a stepping stone to more robust performance monitoring solutions like:

Use it to sell ’em on the benefits and if you have budget, pay for something better 😅


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Resume/CV on the Jamstack

Zach Leatherman IndieWeb Avatar for https://zachleat.com/is a builder for the web at IndieWeb Avatar for https://fontawesome.com/Font Awesome and the creator/maintainer of IndieWeb Avatar for https://www.11ty.devEleventy (11ty), an award-winning open source site generator. At one point he became entirely too fixated on web fonts. He has given 83 talks in nine different countries at events like Beyond Tellerrand, Smashing Conference, Jamstack Conf, CSSConf, and The White House. Formerly part of CloudCannon, Netlify, Filament Group, NEJS CONF, and NebraskaJS. Learn more about Zach »

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24 Comments
  1. Paul Applegate

    You had me at pretty colorful graphs aka a dashboard.

  2. Stefan Judis

    That is very cool! Thanks for sharing that Zach! Quick question about the netlify build cache, if you don't mind. 🙈 The history won't persist if I rebuild with "clear cache" or?

  3. The Realest

    Will the official 11ty boards switch to this? Maybe update daily?

  4. Zach Leatherman

    It is very possible, they’re both using performance-leaderboard. Though it will require more work to orchestrate 348 sites and stay under that 15m build limit 😅

  5. Nicolas Hoizey

    Wow, I was hacking my own version of github.com/zachleat/perfo… today, I should have waited a little! 😍

  6. Todd Parker

    This is sweet!

  7. Andy Bell

    This is ridiculously good zach

  8. Nicolas Hoizey

    This new tool looks amazing, I'm trying it right now! 👍

  9. Zach Leatherman

    Thanks Todd!

  10. Zach Leatherman

    Awesome, thanks Andy!

  11. Zach Leatherman

    one handy trick I use is to delete all the javascript

  12. ross

    Trying to get auto-deploys with netlify had 1 issue with the `npm run zip-results` in build-production

  13. OX Web Development

    Would love to see this for Wordpress

  14. Bayu Angora

    I wonder that Next is faster than Hugo.

  15. am I jacky? or am I jacky's dog? lol 📟🇭🇹✊🏾

    Ah, I have a fix for this (it requires pre-stitching an image with a cap) but I'm like three months out on it >_<

  16. Zach Leatherman

    oh nice, I like that idea although the responsive behavior might feel a bit weird if the facepiles don’t reflow?

  17. am I jacky? or am I jacky's dog? lol 📟🇭🇹✊🏾

    It depends! I only have this in my notes but I was going to wrap it in a custom element that took up a max width and did the math before hand (I also was going to run something that did the sizing of images beforehand)

  18. Aaron Parecki

    lol I have this problem too! At least you collapse your “likes” and “reposts” sections by default! I’m thinking about adding a “show more comments” button that you have to click in order to show more than the last 20 or so comments.

  19. Matthias Ott

    Haha, same here! Especially for the personal website article, page size grew dramatically. Used to download the avatars manually (😇) and run them through a Photoshop action and ImageOptim… 😂

  20. Nicolas Hoizey

    Also, there’s something strange on my mobile Safari… 😅

  21. Nicolas Hoizey

    Indeed! 👍 github.com/zachleat/zachl…

  22. Søren Birkemeyer 🦊

    Woohoo 🙌

  23. bertrandkeller

    Is it inspired by lowtus.fr ? @lowtusdev

  24. Zach Leatherman

    I don’t think so but that does look very comprehensive! Nice work!

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