Github user dbtsai commented on a diff in the pull request:
https://github.com/apache/spark/pull/15628#discussion_r107972466
--- Diff:
mllib-local/src/main/scala/org/apache/spark/ml/linalg/Matrices.scala ---
@@ -1079,4 +1267,15 @@ object Matrices {
SparseMatrix.fromCOO(numRows, numCols, entries)
}
}
+
+ private[ml] def getSparseSize(numActives: Long, numPtrs: Long): Long = {
+ // 8 * values.length + 4 * rowIndices.length + 4 * colPtrs.length + 12
+ 12 + 12 + 1
+ 12L * numActives + 4L * numPtrs + 37L
--- End diff --
Nice that we can get `37L` using java apis to ensure the portability.
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