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librsvg preferred over WebKit2 #312

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jdtsmith opened this issue Nov 6, 2022 · 2 comments
Open

librsvg preferred over WebKit2 #312

jdtsmith opened this issue Nov 6, 2022 · 2 comments

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@jdtsmith
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jdtsmith commented Nov 6, 2022

Just received this note from Yamamoto after asking about some SVG issues I encountered in my 28.2 emacs-mac build:

The Mac port uses WebKit for rendering SVG images if librsvg is
unavailable or disabled.  As of WebKit 1 (32-bit or < macOS 10.13),
DOM access was available via Objective-C objects, but WebKit 2 dropped
this feature and we have to use JavaScript, which seems to be partly a
cause of slowness.

Given that, should --with-librsvg be the default? In my testing it is much faster.
@orgtre orgtre mentioned this issue Nov 16, 2022
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@neoheartbeats
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This performance related issue is mentioned at 311#issuecomment.
Additionally, if --with-librsvg is used, issues at emacs-plus #522 & #525 are reported.

@railwaycat
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It looks reasonable to make --with-librsvg on my default. I will have a try to see if the cask packing for librsvg is also good.

@jeff-phil jeff-phil mentioned this issue May 15, 2023
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@jdtsmith jdtsmith mentioned this issue Aug 1, 2023
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@ph7 ph7 mentioned this issue Dec 8, 2023
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@jdtsmith @railwaycat @neoheartbeats