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| author | npm <npm@chromium.org> | 2016-10-28 14:30:44 -0700 |
|---|---|---|
| committer | Commit bot <commit-bot@chromium.org> | 2016-10-28 14:30:44 -0700 |
| commit | 900f421e29daf2ab62de3ae8dc821f031bc7bdb3 (patch) | |
| tree | 7f9020dd8a2172b523d8a35864a5c6b0053ec658 /core/fpdfdoc/cpdf_metadata.cpp | |
| parent | dc0401a0da446a0744419d71f2bb216f3b90ad0f (diff) | |
| download | pdfium-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
Diffstat (limited to 'core/fpdfdoc/cpdf_metadata.cpp')
0 files changed, 0 insertions, 0 deletions