48e08aa973
<ostream> is one of the more expensive headers to include
and that's amplified by SkRefCnt.h's popularity.
We've been including <ostream> for sk_sp's operator<<. That's only
used by Chromium and while we could just sprinkle in a bunch of .get()
calls and remove operator<<, when I started going through and actually
doing that I got the feeling I was making things pointlessly harder to
read and write, and wanted to find a way to make it actually work.
My next instinct was to template it without mentioning ostreams,
template <typename OS, typename T>
auto operator<<(OS& os, const sk_sp<T>& sp) -> decltype(os << sp.get()) {
return os << sp.get();
}
but that makes this operator<< ambiguous with some other templated operator<<
in GTest. They got in first, so they win...
So ultimately, switch <ostream> to <iosfwd>. Anyone using our
operator<<() presumably has <ostream> included already, and the #include
cost for <iosfwd> is small enough that I don't think we'll mind keeping
this around indefinitely.
To repro, look at before/after of -ftime-trace:
~/chromium/src/third_party/llvm-build/Release+Asserts/bin/clang++ -I. -Os -c src/core/SkCanvas.cpp -ftime-trace
I have tested locally that Chromium builds with this change.
Change-Id: I9decc2e65b5cc8fd07d8106a5eff81901aedd7d5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/237190
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
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| animations | ||
| bench | ||
| bin | ||
| 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.