tree 50234beebb5f3fe939f1259d360799c779295d09
parent 13d15af08fe0e916f998929f84209aa1cecfd0b5
author Sen Jiang <senj@google.com> 1484789202 -0800
committer Sen Jiang <senj@google.com> 1484789202 -0800

imgdiff: cache bsdiff suffix array in zip mode.

In zip mode, if a chunk is not deflate or its filename can't be found
in source chunks, the entire source file is used as old data for bsdiff,
To avoid repeatedly construct the suffix array used by bsdiff, we cache
the suffix array of the entire source file.

Bug: 34281147
Test: =time -v imgdiff -z Chrome-ORF74B.apk Chrome-ORF76B.apk Chrome.imgdiff
Change-Id: Ifd957ccecf7226fcb44dbf28c58969a06ef74f4b