PNG filesize is 10 times photoshop

[stuartcusackie]

Hey, I was hoping to use webp for everything but webp creates blurry artefacts when using clipart style imagery.

So instead, I am allowing users to use PNG in some cases to keep the clipart sharp. Unfortunately an 40kb png exported from photoshop (17kb when run through tinypng.com) becomes 400kb when using glide & GD.

Photoshop (45.4 KB):

tinypng.com (17.5 KB):

Glide / GD WebP (11 KB) - I can't share webp on github but you will see the artefacts here:
https://pasteboard.co/K40uMoc.webp

Glide / GD PNG (404 KB)

Any ideas?

[stuartcusackie]

Found the problem...

I was upscaling this particular image from 1100px to 1200px wide, and for some reason that massively increased the PNG size.

Still seems like a bug but I can using 'fit' => 'max' to avoid it.