Cairosvg rendered pdf is slow and heavy about cairosvg

[liZe]

You're right, the output file is really heavy and loads slowly in some clients. It seems to be caused by the opacity of the rectangles: without these opacities, the file size goes from 2 MB to 230 kB. I'm trying to find an optimization to fix this problem, I hope that the problem is in CairoSVG and not in Cairo!

[liZe]

I finally have a 238 kB file with this fix, that's ~12% of the original file size, and that's better in my clients.

For the record and the curious people: when a tag has an "opacity" attribute, there's no need to create an atomic layer for the compositing if there's only one element to draw. This pre-compositing optimization is really useful when there are lots of semi-transparent elements, this gist is a really good example.

[makmanalp]

Wow, I had honestly given up hope on this one, thank you so much!

I'll test it out on the site to see the improvement and let you know how it goes. Would you be opposed to doing a new release for CairoSVG on pypi after that?

[makmanalp]

Just tested it out locally - drastic improvement! Loads instantly and files are much smaller like you said.

[liZe]

1.0.8 released!

[makmanalp]

👍