Show HN: Jampack – Optimizes static websites as a post-processing step

Post by georges_gomes » Mon, Mar 25, 2024, 4:57 PM UTC

microflash wrote: post #8

georges_gomes wrote: post #3

Earlier quoted context omitted.

Yes, lots of cool things to do around fonts! I have in TODO to add automatic system font fallback with the right metrics in order to improve CLS automatically. Is it what you call "freeze opentype axes based on font-feature-settings" or is it something else? I would like to do the subset font optimization. I'm just not sure how much of an improvement it's going to be. Have you done it manually before?

> Is it what you call "freeze opentype axes based on font-feature-settings" or is it something else? I was talking in context of variable fonts which come with lots of features mapped to opentype tags and axes. font-feature-settings property selects (or activates) those features. Usually this is done at few CSS selector levels. The variable fonts can be trimmed by freezing those features. I did something like this wi…

Post by georges_gomes » Mon, Mar 25, 2024, 5:01 PM UTC

KingOfCoders wrote: post #10

After trying this (JS always amazing, 47 vulnerabilities (19 moderate, 24 high, 4 critical)), my web vitals went down from 84 to 77. So not sure about that one. Also some svg images went missing.

Post by [deleted] » Mon, Mar 25, 2024, 5:14 PM UTC

Post by celicoo » Mon, Mar 25, 2024, 5:15 PM UTC

Post by georges_gomes » Mon, Mar 25, 2024, 5:21 PM UTC

chambored wrote: post #18

This is exactly what I've been looking for. I had been using my own scripts with Sharp for image optimizations like this, but this eliminates the need for the that entirely and works much better! I ran Jampack after building my Quarto static site and got a 32% smaller folder with no noticeable drawbacks yet. Here are my metrics before Jampack and after using PageSpeed Insights: before Jampack: - mobile: - 52 Performa…