Github user viirya commented on the issue:
https://github.com/apache/spark/pull/13439
@kiszk I've run some benchmark codes. The benchmark results:
ColumnVector R/W: Best/Avg Time(ms) Rate(M/s)
Per Row(ns) Relative
------------------------------------------------------------------------------------------------
On Heap, Not Constant 57 / 59 0.7
1395.4 1.0X
On Heap, Constant 44 / 44 0.9
1062.0 1.3X
Off Heap, Not Constant 1059 / 1092 0.0
25861.4 0.1X
Off Heap, Constant 998 / 1143 0.0
24373.4 0.1X
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