Github user brkyvz commented on the pull request:
https://github.com/apache/spark/pull/2294#issuecomment-56089214
Tests for the Level 2 operations (gemv):
nativeBLAS was faster across the board. Here are the results (in ms):
m | n | f2j | native
---|----|-----|--------
1000 | 500 | 0.7 | 0.1
1000 | 1000 | 2.3 | 0.7
1000 | 5000 | 7.7 | 3.6
5000 | 500 | 3.8 | 2.4
5000 | 1000 | 7.7 | 4.0
5000 | 5000 | 38.4 | 17.4
10000 | 500 | 6.5 | 4.5
10000 | 1000 | 13.0 | 8.9
10000 | 5000 | 75.4 | 36.7
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