Gimp make jpg to Webp 100% quality half size while IM6 make double size. why?

[rich2005]

no problem
Looking at the large IM 100 quality .webp file size, maybe IM uses lossless format instead of "lossy"

edit: it is using webpinfo on the IM webp shows it lossless.

Quote:rich@rich-neon:~/Downloads/libwebp-1.5.0-linux-x86-64/bin$ ./webpinfo 3HD5wzP.webp
File: 3HD5wzP.webp
RIFF HEADER:
File size: 5387762
Chunk VP8L at offset 12, length 5387750
Width: 2848
Height: 4288
Alpha: 0
Animation: 0
Format: Lossless (2)
No error detected.