resvg PNG output filesize

[david-buck]

I'm in the process of migrating my OG image layouts from my customised solution based on vercel/ogimage, and things are generally pretty smooth.

One thing I've noticed that that the generated files are very different in file size, with the Satori-based ones being about 2x for comparable images.

Is there a chance that something like oxipng could be incorporated into the process?

[shuding]

It’s configurable, but also a trade off, that setting a higher compression rate results slower generation speed. I’ll see what we can make a better balance here.

[david-buck]

That would be great.

Anecdotally, the images generated by resvg are more accomodating of a compression pass than the ones generated by puppeteer:

This example is running using oxipng on fastest setting on almost identical images.

Resvg:
in 82,919 bytes -> out 13,568 bytes
83.6% saving

Puppeteer:
in 45,950 bytes -> out 33,838 bytes
26.4% saving

[styfle]

Here's a related feature request for jpeg: #235