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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/10/20 18:43:59 UTC

[GitHub] [arrow] pitrou edited a comment on pull request #8494: ARROW-10328: [C++] Vendor fast_float number parsing library

pitrou edited a comment on pull request #8494:
URL: https://github.com/apache/arrow/pull/8494#issuecomment-712850295


   After:
   * Parsing raw values:
   ```
   FloatParsing<FloatType>          11936 ns        11934 ns       184367 items_per_second=83.7942M/s
   FloatParsing<DoubleType>         10989 ns        10988 ns       194016 items_per_second=91.0101M/s
   ```
   * CSV converter performance:
   ```
   FloatConversion                 108180 ns       108166 ns         6442 items_per_second=73.9605M/s
   ```
   * Reading a CSV file of floating-point numbers (single-threaded):
   ```
   276 MB (10000000 rows) in 0.903 s. => 306 MB/s.
   276 MB (10000000 rows) in 0.844 s. => 328 MB/s.
   276 MB (10000000 rows) in 0.818 s. => 338 MB/s.
   276 MB (10000000 rows) in 0.812 s. => 341 MB/s.
   276 MB (10000000 rows) in 0.800 s. => 346 MB/s.
   ```
   


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