RFR (S) 8150465: Unsafe methods to produce uninitialized arrays

[Andrew Haley]

On 02/25/2016 01:44 PM, Aleksey Shipilev wrote:
> Of course, you will still see garbage data if after storing the array
> elements into the uninitialized array you would publish it racily. But
> the same is true for the "regular" allocations and subsequent writes.
> The only difference is whether you see "real" garbage, or some
> "synthetic" garbage like zeros. It is, of course, a caller
> responsibility to publish array safely in both cases, if garbage is
> unwanted.

Of course, my worry with this optimization assumes that programmers
make mistakes.  But you did say "complicated processing is done after
the allocation."  And that's where programmers make mistakes.

Andrew.