kiszk commented on issue #27546: [SPARK-30773][ML]Support NativeBlas for level-1 routines URL: https://github.com/apache/spark/pull/27546#issuecomment-592309688 This performance experiment is done only one environment (one CPU, one JVM, and others). Then, we say `256` looks good threshold. I am afraid that other environments have other thresholds (e.g. 128, 1024, or others). This is why the threshold should be configurable.
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