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set PNG compression level back to 1

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On my machine, this cuts the CPU time to run all GMs and write out
PNGs by about half, from ~67s to ~34s (wall, 4s -> 3s).  File size
goes from 148M to 180M, about a 22% increase.

Change-Id: I50f051e5c87cc6854797d6838e0342cbd7e95003
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/204130
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
This commit is contained in:
Mike Klein 2019-03-27 12:36:11 -05:00 committed by Skia Commit-Bot
parent baa1b357ef
commit 22a5e345c9
1 changed files with 1 additions and 2 deletions
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3
tools/HashAndEncode.cpp
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@ -137,8 +137,7 @@ bool HashAndEncode::writePngTo(const char* path,
// Fastest encoding and decoding, at slight file size cost is no filtering, compression 1.
png_set_filter(png, PNG_FILTER_TYPE_BASE, PNG_FILTER_NONE);
// TODO(mtklein): set back to 1 after all the bots have cycled through new images / hashes?
png_set_compression_level(png, 9);
png_set_compression_level(png, 1);
static const sk_sp<SkData> profile = SkWriteICCProfile(k2020_TF, SkNamedGamut::kRec2020);
png_set_iCCP(png, info,