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authornpm <npm@chromium.org>2016-10-28 14:30:44 -0700
committerCommit bot <commit-bot@chromium.org>2016-10-28 14:30:44 -0700
commit900f421e29daf2ab62de3ae8dc821f031bc7bdb3 (patch)
tree7f9020dd8a2172b523d8a35864a5c6b0053ec658 /core/fxcodec
parentdc0401a0da446a0744419d71f2bb216f3b90ad0f (diff)
downloadpdfium-900f421e29daf2ab62de3ae8dc821f031bc7bdb3.tar.xz
Revert of Traverse PDF page tree only once in CPDF_Document Try 2 (patchset #3 id:40001 of https://codereview.chromium.org/2442403002/ )
Reason for revert: Not quite right yet. Original issue's description: > Traverse PDF page tree only once in CPDF_Document > > Try 2: main fix was recursively popping elements from the stack. Since > the Traverse method can be called on non-root nodes from GetPage(), we > have to make sure to properly update the parents. > > Try 1 at https://codereview.chromium.org/2414423002/ > > In our current implementation of CPDF_Document::GetPage, we traverse > the PDF page tree until we find the index we are looking for. This is > slow when we do calls GetPage(0), GetPage(1), ... since in this case > the page tree will be traversed n times if there are n pages. This CL > makes sure the page tree is only traversed once. > > Time to load the PDF from the bug below in chrome official build: > Before this CL: around 1 minute 25 seconds > After this CL: around 4 seconds > > BUG=chromium:638513 > > Committed: https://pdfium.googlesource.com/pdfium/+/d3a2009d75eac3cda442f545ef0865afae7b35cf TBR=tsepez@chromium.org,weili@chromium.org,thestig@chromium.org # Not skipping CQ checks because original CL landed more than 1 days ago. BUG=chromium:638513 Review-Url: https://codereview.chromium.org/2461063003
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