5 ms·

Lighthouse scores: how to reduce render-blocking scripts

acconrad 8y ago
Kind of a lot of words for using Async, Defer, or IntersectionObserver. But this is a weird case of using IntersectionObserver. I'd rather use it for something like lazy-loading images[1]. They have a much higher download cost and will provide a much greater boost in performance than optimizing your JavaScript. Also, by placing all of your scripts at the bottom (save for a few at the top like Modernizr), you really don't need to worry too much about async vs defer. [1] https://www.machmetrics.com/speed-blog/how-to-lazy-loading-images-script-slash-page-load-time/ https://www.machmetrics.com/speed-blog/how-to-lazy-loading-i...
- RobertRoberts 8y ago
  It appears Google will be integrating lazy loading into the browser.[0] In my almost 20 years of development experience, I find my todo list extremely long. And a core principle that has served me well is that if a feature is coming to the browsers for free, it's cheaper and easier to wait for the feature instead of spending real time/money building a cheap copy of it, and then having to rip it out a year later for the native feature. "Feature patience" seems a fitting description. I have recently used IntersectionObserver to replace scroll event functionality (modifying sticky positioned headers) and it's great for that, but I don't want to use it for lazy loading, seems like way to much work. [0] https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/czmmZUd4Vww/1-H6j-zdAwAJ https://groups.google.com/a/chromium.org/forum/#!msg/blink-d...
falsedan 8y ago
> If this is too many words, the pretty picture below should help clear things up. Holy crap, I knew big G hates users but this level on condescension is off the charts!
- kaycebasques 8y ago
  I write the Lighthouse docs. This is not one of our docs.
- Romanulus 8y ago
  I scrolled to the bottom. Yep, she's pretty cute.
  - sctb 8y ago
    If you won't stop posting civilly and substantively we'll ban the account. https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html
f4rker 8y ago
nice spam. nothing here is new.

Kind of a lot of words for using Async, Defer, or IntersectionObserver. But this is a weird case of using IntersectionObserver. I'd rather use it for something like lazy-loading images[1]. They have a much higher download cost and will provide a much greater boost in performance than optimizing your JavaScript. Also, by placing all of your scripts at the bottom (save for a few at the top like Modernizr), you really don't need to worry too much about async vs defer. [1] https://www.machmetrics.com/speed-blog/how-to-lazy-loading-images-script-slash-page-load-time/ https://www.machmetrics.com/speed-blog/how-to-lazy-loading-i...

RobertRoberts 8y ago
It appears Google will be integrating lazy loading into the browser.[0] In my almost 20 years of development experience, I find my todo list extremely long. And a core principle that has served me well is that if a feature is coming to the browsers for free, it's cheaper and easier to wait for the feature instead of spending real time/money building a cheap copy of it, and then having to rip it out a year later for the native feature. "Feature patience" seems a fitting description. I have recently used IntersectionObserver to replace scroll event functionality (modifying sticky positioned headers) and it's great for that, but I don't want to use it for lazy loading, seems like way to much work. [0] https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/czmmZUd4Vww/1-H6j-zdAwAJ https://groups.google.com/a/chromium.org/forum/#!msg/blink-d...

falsedan 8y ago

> If this is too many words, the pretty picture below should help clear things up. Holy crap, I knew big G hates users but this level on condescension is off the charts!

kaycebasques 8y ago
I write the Lighthouse docs. This is not one of our docs.
Romanulus 8y ago
I scrolled to the bottom. Yep, she's pretty cute.
- sctb 8y ago
  If you won't stop posting civilly and substantively we'll ban the account. https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html

f4rker 8y ago

nice spam. nothing here is new.