ewk_view_tiled was introduced for faster scrolling. But we didn't use ewk_view_tiled very long time while we focused webkit2/efl. Indeed, there are many bugs and we don't have plan to fix them. (Tizen 1.0 has some fixes but we didn't take care of them) Nowadays, We can use WebCore's TiledBackingStore with ewk_view_single and it looks more stable.
Created attachment 219586 [details] Patch
Comment on attachment 219586 [details] Patch Though you notify this bug to webkit-efl mailing list, there wasn't any opinion. Go ahead !
Comment on attachment 219586 [details] Patch Clearing flags on attachment: 219586 Committed r161134: <http://trac.webkit.org/changeset/161134>
All reviewed patches have been landed. Closing bug.