tree 758c92f102ea03434996d9fae2b8f480f8fa2a33
parent 1af4f5b6223e2dae5a17c996e1edefa20bda2eaa
author Lei Zhang <thestig@chromium.org> 1694195528 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1694195528 +0000

Improve CPDF_CMapParser::HandleCid() performance

Send the entire range of codes to write to CPDF_CMap in one go. Then
CPDF_CMap can create a single span and write all the values, instead of
creating one span per value. While spans are not expensive to create,
creating 64K spans in a loop does add up. This makes pdf_cmap_fuzzer run
3X as fast for the problematic input.

Bug: chromium:1478569
Change-Id: I3322de8aeaff23c5e562d4acc55ade57c0cc03ad
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/111730
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>