message: Reduce buffer size tightly.
diff: @@ -1550,7 +1550,7 @@ inline void SparseMatMul<TL, TR>::Compute(
  // Note buffer needs enough space to hold at most a KR * NR matrix since that
  // is the block size per iteration.
  const int buffer_num_rows =
  - std::min(KR, right_dim0) * (std::min(NR, right_dim1) + N - 1) / N;
  + std::min(KR, right_dim0) * ((std::min(NR, right_dim1) + N - 1) / N);
  MatrixR buffer(buffer_num_rows, N);
  std::vector<ConstMatrixMapR*> right_slices;
  