Bug 27304 – WebKit should provide usage and eligibility information about the page cache

• Component: WebKit Misc.
• Status: RESOLVED FIXED

[Brady Eidson]

WebKit should provide usage and eligibility information about the page cache.

This will help a client provide a debug window into the page cache to spot common disqualifiers.

[Brady Eidson]

Created attachment 32791 [details]
Patch

Comment on attachment 32791 [details]
Patch

> +        (WebCore::CachedFrame::childFrameCount):

Since this is recursive, I think a better name would be descendantFrameCount. A function that returns 1 + number of descendants (i.e. total number of frames in the subtree) may be simpler (and easier to use in PageCache::frameCount!).

> +        (+[WebCoreStatistics numberCachedPages]):
> +        (+[WebCoreStatistics numberCachedFrames]):
> +        (+[WebCoreStatistics numberAutoreleasedPages]):

I think either “numberOf*” or “*Count” would be better names.

> +        * WebView/WebFrame.mm:
> +        (-[WebFrame _cacheabilityDictionary]): Returns a dictionary with all the data about
> +          why the frame is not cacheable.

What if the frame is cacheable?

> +    FrameLoader* fl = _private->coreFrame->loader();
> +    DocumentLoader* dl = fl->documentLoader();

Please use “frameLoader” and “documentLoader” as variable names.

Comment on attachment 32791 [details]
Patch

r=me if you address the above comments

[Brady Eidson]

Sending        WebCore/ChangeLog
Sending        WebCore/WebCore.base.exp
Sending        WebCore/history/CachedFrame.cpp
Sending        WebCore/history/CachedFrame.h
Sending        WebCore/history/PageCache.cpp
Sending        WebCore/history/PageCache.h
Sending        WebKit/mac/ChangeLog
Sending        WebKit/mac/Misc/WebCoreStatistics.h
Sending        WebKit/mac/Misc/WebCoreStatistics.mm
Sending        WebKit/mac/WebKit.exp
Sending        WebKit/mac/WebView/WebFrame.mm
Sending        WebKit/mac/WebView/WebFramePrivate.h
Transmitting file data ............
Committed revision 45923.