tree 54c4d121260fc92e431c99a60b887cd7da377d12
parent ef109ee3812ace5dd7860bcf25fad96f33d2b8cd
author Lei Zhang <thestig@chromium.org> 1624986887 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1624986887 +0000

Do check once, instead of one per pixel in CJPX_Decoder::Decode().

Pull a check out of the inner for-loop inside CJPX_Decoder::Decode(), as
its result will be the same every time. This results in a 3% speedup,
as measured by running:
testing/tools/safetynet_measure.py --profiler perfstat bug_1698.pdf,
where bug_1698.pdf is the PDF attached to https://crbug.com/pdfium/1698.

Change-Id: Ie098f96130c6c6d0a8212f0cacc886886f5bdbe3
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/82714
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>