Bug 156368 – REGRESSION (r194898): Multi download of external SVG defs file by <use> xlinks:href (caching)

• Component: Page Loading
• Status: RESOLVED FIXED

[hexalys]

Created attachment 275939 [details]
Sample network pane view of multi download on cold cache

You can notice this bug while looking at the Network panel in the Web Inspector on latest Safari 9 or Nightly. The SVG file is requested 5 times for 5 different fragment identifiers. It appears to be a Safari 9.3 regression. I am not seeing the problem on a 9.2 Simulator or older QtWebkit(s).

See URL for repro and snapshot.

[Radar WebKit Bug Importer]

<rdar://problem/25611746>

I am seeing this issue in Safari 9.1 and Mobile Safari 9.3 on iOS

[Lionel]

Seems to be a 9^ regression, since I have the same behaviour in 9.1 (OSX 10.11.4) but not in Safari 8.0.2 (OSX 10.10.1).

[Timothy Hatcher]

Another test case here: https://github.com/martinwolf/safari-9-svg-external-content-bug

[Lionel]

(In reply to comment #4)
> Another test case here:
> https://github.com/martinwolf/safari-9-svg-external-content-bug

Deployed this repo here:
- External: https://safari-9-svg-external-content-bug-rmmbpapqov.now.sh/svg-use-external.html
- Inline: https://safari-9-svg-external-content-bug-rmmbpapqov.now.sh/svg-use-inline.html

[Simon Fraser (smfr)]

Regressed in http://trac.webkit.org/changeset/194898

rdar://problem/25572061

[Antti Koivisto]

Created attachment 277056 [details]
patch

[Antti Koivisto]

Created attachment 277057 [details]
patch

[Stephanie (Sullivan) Rewis]

This is pretty huge since our design system uses large sprites of our icons and the way they're currently downloading every time is a very big problem. I hope this will be prioritized and fixed quickly.

[Simon Fraser (smfr)]

Comment on attachment 277057 [details]
patch

View in context: https://bugs.webkit.org/attachment.cgi?id=277057&action=review

> Source/WebCore/loader/TextResourceDecoder.h:55
> +    bool hasEqualEncodingForCharset(const String& charset) const;

'charset' argument name can be removed.

> LayoutTests/ChangeLog:16
> +        * platform/mac/fast/frames/frame-set-scaling-3d-expected.png:
> +        * platform/mac/fast/frames/frame-set-scaling-centered-expected.png:
> +        * platform/mac/fast/frames/frame-set-scaling-expected.png:
> +        * platform/mac/fast/frames/frame-set-scaling-rotate-expected.png:
> +        * platform/mac/fast/frames/frame-set-scaling-skew-expected.png:

I don't think you meant to include these in the changelog.

[Antti Koivisto]

https://trac.webkit.org/r199881

[Elliot Geno]

I think I found an additional bug... No SVGs are caching with an object tag: https://dl.dropboxusercontent.com/u/1256960/%20Research/JS/SVG_Parameters/dotObjectBug.html

[Brady Eidson]

(In reply to comment #12)
> I think I found an additional bug... No SVGs are caching with an object tag:
> https://dl.dropboxusercontent.com/u/1256960/%20Research/JS/SVG_Parameters/
> dotObjectBug.html

That sounds like a related but different bug.

Could you file a new one to track it?

[hexalys]

(In reply to comment #13)
> (In reply to comment #12)
> > I think I found an additional bug... No SVGs are caching with an object tag:
> > https://dl.dropboxusercontent.com/u/1256960/%20Research/JS/SVG_Parameters/
> > dotObjectBug.html
> 
> That sounds like a related but different bug.
> 
> Could you file a new one to track it?

I believe that is already a bug for this:
https://bugs.webkit.org/show_bug.cgi?id=106180

But I don't see a caching issue <object data=".svg"> in 202569.