Slower jpeg encoding on linux-arm64

[coldays]

Hello!
First of all, thank you for this amazing library!

It looks as if magick.net is not using libjpeg-turbo to encode jpeg's on linux-arm64 or that the libjpeg-turbo that is being used is not compiled with neon instructions.
As of now, the fastest jpeg encode I am able to get is about 10 times slower on linux-arm64.

Does magick.net use libjpeg-turbo on arm64 and if so, is it compiled with neon?

[dlemstra]

Support for SIMD is explicitly disabled for linux-arm64 in libjpeg-turbo. But I don't really know why that was done. Will need to check if enabling would break anything.

[coldays]

Thank you for the quick reply!
That's interesting, it was really hard to find a binary with libjpeg-turbo for linux-arm64 that has it enabled, but it's enabled for all other platforms it seems.
If you have a test build I would be more than happy to help test it on a few different linux-arm64 platforms. Or if you would want to point me in the direction of building it myself, I could build and test it.

[coldays]

I have tested building libjpeg-turbo and using it on a few different linux-arm64 machines and it seems to work well

[dlemstra]

I have already updated my build to enable SIMD on linux arm64 and it is already enabled in the latest release. I completely forgot to send you a message about this.

[coldays]

Sorry I didn't catch that, thank you very much!

[dlemstra]

I don't tell you so I should be the one saying sorry 😁