Reuse the Buffer Array in the map function?

[Wenlei Xie]

Hi,

I am trying to do some tasks with the following style map function:

rdd.map { e =>
    val a = new Array[Int](100)
    ...Some calculation...
}

But here the array a is really just used as a temporary buffer and can be
reused. I am wondering if I can avoid constructing it everytime? (As it
might incur some overhead for JVM?) Would use an array outside the closure
work?

Thank you!

Best,
Wenlei