RFR: 8215995: Add specialized toArray methods to immutable collections

Claes Redestad claes.redestad at oracle.com
Wed Jan 2 20:17:06 UTC 2019

On 2019-01-02 20:55, Martin Buchholz wrote:
>     Which bounds check?
> On the second leg, you know you'll never hit the end of the array, so 
> you can elide the check.  But hotspot may not be so clever and may 
> re-insert it, in a slightly more expensive variant that has actual 
> exception throwing code.

I see what you mean now and perhaps that'd eliminate a branch per 
element if we did toArray inline rather than use an iterator. Might be
a reasonable optimization that can stand on it's own in a follow-up.


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