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Re: Image transforms as a benchmark?
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From: |
Arthur Miller |
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Subject: |
Re: Image transforms as a benchmark? |
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Date: |
Sun, 12 Sep 2021 15:29:15 +0200 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Arthur Miller <arthur.miller@live.com>
>> Date: Sun, 12 Sep 2021 13:45:39 +0200
>>
>> I wonder if image-rotate is handled completely by external libraries? I see
>> no effect on performance, regardless of how many time I rotate some image.
>
> It's handled by the window-system libraries: XLib or Cairo or
> ImageMagick on Unix, GDI on Windows, etc. So you shouldn't see any
> significant performance changes in these functionalities due to
> optimization switches.
Yes, I understand.
>> Is it same situation for scaling down? I see big difference when
>> scaling up images so I guess that is handled by Emacs own code?
>
> Not sure (is your build with or without ImageMagick?)
It is without ImageMagick.