Minimize virtual function calls in MarkupAccumulator

[Chris Dumez]

We can minimize the number of virtual function calls in MarkupAccumulator by:
- De-virtualizing MarkupAccumulator::appendString(), which is never overridden
- Having MarkupAccumulator::appendEndTag() take an Element in argument instead of a Node, as it only applies to Element. This will force callers to do the isElementNode() check *before* calling the virtual function, instead of calling appendEndTag() unconditionally and have it return early.

[Chris Dumez]

Created attachment 238380 [details]
Patch

[Benjamin Poulain]

Comment on attachment 238380 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=238380&action=review

> Source/WebCore/page/PageSerializer.cpp:109
> -    virtual void appendEndTag(const Node&) override;
> +    virtual void appendEndTag(const Element&) override;

Instead of adding isElementNode() everywhere, you could have:
inline void appendEndTag(Node& node) {
    if (node.isElementNode())
        appendEndTag(toElement(node));   
}

[Chris Dumez]

Created attachment 238396 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 238396 [details]
Patch

Clearing flags on attachment: 238396

Committed r173783: <http://trac.webkit.org/changeset/173783>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.