[webkit-reviews] review requested: [Bug 13233] Need to implement an optimizing XPath evaluator : [Attachment 30812] first step

[bugzilla-daemon at webkit.org]

Alexey Proskuryakov <ap at webkit.org> has asked  for review:
Bug 13233: Need to implement an optimizing XPath evaluator
https://bugs.webkit.org/show_bug.cgi?id=13233

Attachment 30812: first step
https://bugs.webkit.org/attachment.cgi?id=30812&action=review

------- Additional Comments from Alexey Proskuryakov <ap at webkit.org>
Implement some optimizations:
- avoid building full NodeSets to evaluate predicates, if possible;
- optimize "//" if there are no context sensitive predicates.