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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/10/20 13:27:50 UTC

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

pitrou commented on pull request #8494:
URL: https://github.com/apache/arrow/pull/8494#issuecomment-712849550


   Before:
   * Parsing raw values:
   ```
   FloatParsing<FloatType>          39763 ns        39758 ns        52350 items_per_second=25.152M/s
   FloatParsing<DoubleType>         29812 ns        29808 ns        68765 items_per_second=33.5483M/s
   ```
   * CSV converter performance:
   ```
   FloatConversion                 199539 ns       199508 ns         3498 items_per_second=40.0986M/s
   ```
   * Reading a CSV file of floating-point numbers (single-threaded):
   ```
   276 MB (10000000 rows) in 1.543 s. => 179 MB/s.
   276 MB (10000000 rows) in 1.481 s. => 186 MB/s.
   276 MB (10000000 rows) in 1.492 s. => 185 MB/s.
   276 MB (10000000 rows) in 1.469 s. => 188 MB/s.
   276 MB (10000000 rows) in 1.471 s. => 188 MB/s.
   ```
   


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