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3 Commits

Author SHA1 Message Date
Alex Stewart 16f9b34c3b Remove Intel TBB threading support. 
- In light of the C++11 threads threading option this is no longer
  necessary for cross-platform threading support and did not offer a
  noticeable performance gain over either the C++11 threads
  implementation or OpenMP.

Change-Id: Icb588d520888c19a1775171795b55bcaffb3d256
 2018-07-03 18:05:36 +00:00
Mike Vitus 7b2717582a Adds C++11 parallel for implementation. 
Implements ParallelFor using the C++11 based ThreadPool.  The C++11
parallel for is 50-70% faster than single threaded, and 20-30% slower
than TBB.

Tested by compiling with OpenMP, TBB, and C++11 Threading support and
ran the unit tests.  Ran bazel as well.

Change-Id: I7fd6c9037ff9f200ce6999b5f39918995bb6b8ea
 2018-02-26 16:12:03 -08:00
Yury Prokazov 4ffec20a44 Add TBB threading support. 
There are platforms where OpenMP is not available. This
patch adds support for Intel Threading Building Blocks (TBB)
as an alternative threading backend.

Change-Id: I94497d7cba0c3cfaccfc992169236f17fe948ae9
 2017-09-25 12:43:14 +02:00