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Pushing the zero-initialization into the sk_malloc_etc call can be more efficient than a two-step malloc-and-then-memset, e.g. if the memory allocator gives us something from an already-known-zeroed region. Some microbenchmark numbers (milliseconds per decode) from running Chromium's image_decode_bench program on a few GIF files: Before After Ratio Filename Width x Height = Pixels 0.109 0.107 1.02 hat.gif 90 x 112 = 10080 7.062 6.879 1.03 harvesters.gif 1165 x 859 = 1000735 33.342 30.544 1.09 droids.gif 2560 x 1920 = 4915200 Ratio > 1.00 means a performance improvement. image_decode_bench comes from: https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/testing/image_decode_bench.cc hat.gif and harvesters.gif come from: https://github.com/google/wuffs/tree/master/test/data droids.gif comes from: https://cs.chromium.org/chromium/src/third_party/blink/perf_tests/image_decoder/resources/ These are x86_64 Broadwell numbers. I don't have ARM numbers readily available, but nothing about this commit should be arch-specific. Bug: skia:8235 Change-Id: Icf45b7ac5b7194eaab455628e44d4aedf30ddbfe Reviewed-on: https://skia-review.googlesource.com/c/skia/+/254836 Commit-Queue: Leon Scroggins <scroggo@google.com> Reviewed-by: Leon Scroggins <scroggo@google.com> |
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| animations | ||
| bench | ||
| bin | ||
| build/fuchsia | ||
| build_overrides | ||
| dm | ||
| docker | ||
| docs/examples | ||
| example | ||
| experimental | ||
| fuzz | ||
| gm | ||
| gn | ||
| include | ||
| infra | ||
| modules | ||
| platform_tools | ||
| resources | ||
| samplecode | ||
| site | ||
| specs | ||
| src | ||
| tests | ||
| third_party | ||
| tools | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitignore | ||
| .gn | ||
| AUTHORS | ||
| BUILD.gn | ||
| codereview.settings | ||
| CONTRIBUTING | ||
| CQ_COMMITTERS | ||
| DEPS | ||
| go.mod | ||
| go.sum | ||
| LICENSE | ||
| OWNERS | ||
| PRESUBMIT.py | ||
| public.bzl | ||
| README | ||
| README.chromium | ||
| RELEASE_NOTES.txt | ||
| whitespace.txt | ||
Skia is a complete 2D graphic library for drawing Text, Geometries, and Images. See full details, and build instructions, at https://skia.org.