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Abseil Team
7f9c536c0a
Implement Eisel-Lemire for from_chars<float>
This does for float what a recent commit did for double.
Median of 5 runs of "time atod_manual_test pnftd/data/*.txt"
user 0m0.730s # Before
user 0m0.701s # After (a speed-up of 1.04x)
where pnftd is https://github.com/nigeltao/parse-number-fxx-test-data
Part of the reason why this speed-up of 1.04x isn't as dramatic as for
the from_chars<double> change is that, out of the 5299993 pnftd test
cases, 76.42% produce result_out_of_range for single precision (compared
to 1.03% for double precision).
"benchy --reference=srcfs --benchmark_filter='SimpleAtof' :numbers_benchmark"
output (which uses deterministic but randomly generated input strings):
name old cpu/op new cpu/op delta
BM_SimpleAtof<absl::string_view>/10/1 392ns ± 2% 323ns ± 3% -17.60% (p=0.000 n=48+48)
BM_SimpleAtof<absl::string_view>/10/2 426ns ± 3% 311ns ± 4% -26.89% (p=0.000 n=59+49)
BM_SimpleAtof<absl::string_view>/10/4 435ns ± 3% 341ns ± 3% -21.68% (p=0.000 n=58+48)
BM_SimpleAtof<absl::string_view>/10/8 501ns ± 3% 393ns ± 3% -21.55% (p=0.000 n=60+50)
BM_SimpleAtof<const char*>/10/1 409ns ± 6% 339ns ± 3% -17.06% (p=0.000 n=48+49)
BM_SimpleAtof<const char*>/10/2 412ns ± 4% 347ns ± 3% -15.82% (p=0.000 n=47+49)
BM_SimpleAtof<const char*>/10/4 463ns ± 6% 369ns ± 6% -20.37% (p=0.000 n=60+50)
BM_SimpleAtof<const char*>/10/8 548ns ± 3% 450ns ± 4% -17.91% (p=0.000 n=57+59)
BM_SimpleAtof<std::string>/10/1 386ns ± 2% 325ns ± 3% -15.74% (p=0.000 n=48+50)
BM_SimpleAtof<std::string>/10/2 425ns ± 3% 311ns ± 4% -26.79% (p=0.000 n=60+50)
BM_SimpleAtof<std::string>/10/4 435ns ± 4% 340ns ± 3% -21.94% (p=0.000 n=59+49)
BM_SimpleAtof<std::string>/10/8 503ns ± 4% 398ns ± 2% -20.89% (p=0.000 n=59+48)
PiperOrigin-RevId: 476880111
Change-Id: Ibc5583677ac2ed338d09d8db960ae8a513eb2ccb
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2 years ago |
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algorithm
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Fix "unsafe narrowing" warnings in absl, 10/n.
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3 years ago |
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base
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Change the macro ABSL_IS_TRIVIALLY_RELOCATABLE into a type trait - absl::is_trivially_relocatable - and move it from optimization.h to type_traits.h.
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2 years ago |
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cleanup
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Export of internal Abseil changes
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3 years ago |
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container
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Add sparse and string copy constructor benchmarks for hash table.
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2 years ago |
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copts
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Add a case to detect when the Bazel compiler string is explicitly set to "gcc",
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3 years ago |
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debugging
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Improve failure message: tell the values we don't like.
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2 years ago |
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flags
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Fix "unsafe narrowing" warnings in absl, 8/n.
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2 years ago |
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functional
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any_invocable_test: Re-enable the two conversion tests that used to fail under MSVC
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3 years ago |
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hash
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Fix "unsafe narrowing" warnings in absl, 10/n.
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3 years ago |
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log
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De-pointerize LogStreamer::stream_, and fix move ctor/assign preservation of flags and other stream properties.
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2 years ago |
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memory
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Don't construct/destroy object twice
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3 years ago |
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meta
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Change the macro ABSL_IS_TRIVIALLY_RELOCATABLE into a type trait - absl::is_trivially_relocatable - and move it from optimization.h to type_traits.h.
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2 years ago |
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numeric
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Change bit_width(T) to return int rather than T.
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3 years ago |
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profiling
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Fix "unsafe narrowing" warnings in absl, 8/n.
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2 years ago |
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random
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Fix "unsafe narrowing" warnings in absl, 8/n.
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2 years ago |
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status
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Fix "unsafe narrowing" warnings in absl, 10/n.
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3 years ago |
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strings
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Implement Eisel-Lemire for from_chars<float>
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2 years ago |
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synchronization
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Fix "unsafe narrowing" warnings in absl, 8/n.
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2 years ago |
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time
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Import of CCTZ from GitHub.
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2 years ago |
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types
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Fix "unsafe narrowing" warnings in absl, 10/n.
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3 years ago |
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utility
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Minor clang-tidy cleanups
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3 years ago |
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BUILD.bazel
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Add a case to detect when the Bazel compiler string is explicitly set to "gcc",
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3 years ago |
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CMakeLists.txt
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Release the Abseil Logging library
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3 years ago |
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abseil.podspec.gen.py
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Export of internal Abseil changes
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4 years ago |
