Antoine Pitrou created ARROW-2479:
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Summary: [C++] Have a global thread pool
Key: ARROW-2479
URL: https://issues.apache.org/jira/browse/ARROW-2479
Project: Apache Arrow
Issue Type: Wish
Components: C++
Reporter: Antoine Pitrou
A few parts of Arrow have started spawning threads to parallelize CPU-bound
tasks. They do so by launching a hard-coded number of threads, disregarding
machine configuration or the fact that Arrow itself might be used from several
threads at once (so hardcoding 8 threads might end up launch N * 8 threads if
the user is calling Arrow from N threads at once...).
Instead we probably want a global thread pool policy, with a singleton thread
pool for CPU-bound tasks (using, by default, a number of threads equal to the
machine's capacity).
See discussion in [https://github.com/apache/arrow/pull/1893]
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