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std.algorithm.searching: no mapping-specialization for extremum merged-on-behalf-of: Sebastian Wilzbach <sebi.wilzbach@gmail.com>
22 lines
790 B
Text
22 lines
790 B
Text
Performance improvements for `std.algorithm.searching.{min,max}Element`
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$(REF minElement, std, algorithm, searching) and $(REF maxElement, std, algorithm, searching)
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are now considerably faster (almost 2x in microbenchmarks)
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as a special path for the identity case is provided. This allows the compiler
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to make use of SSE instructions.
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The exact improvements are:
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$(CONSOLE
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% dmd -release -O test.d && ./test
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extremum.before = 54 secs, 12 ms, 347 μs, and 9 hnsecs
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extremum.after = 29 secs, 521 ms, 896 μs, and 5 hnsecs
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)
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$(CONSOLE
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% ldc -release -O3 test.d && ./test
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extremum.before = 13 secs, 186 ms, 176 μs, and 4 hnsecs
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extremum.after = 2 secs, 241 ms, 454 μs, and 9 hnsecs
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)
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$(LINK2 https://gist.github.com/wilzbach/9f757fa76200956aadb97059d614df34, See the benchmark code).
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