Huge Performance Regression introduced September 18th

Stefan Marr java at
Wed Nov 19 22:35:49 UTC 2014

Hi Gilles:

> On 19 Nov 2014, at 23:27, Gilles Duboscq <duboscq at> wrote:
> I just commited a change that should solve your problem (it will come
> in the nightly push in a few hours).
> On my machine, the perf of your Mandelbrot example went up 10x so the
> regression seems to be fixed.

Thanks, will try to have a look.

For the moment, I went with an unsafe cast to also indicate that the field is never null, which seems to improve warmup a little on a variety of benchmarks. But since Chris mentioned that he might have seen a similar issue in JRuby, a fix in Graal is probably a good thing.


Stefan Marr
INRIA Lille - Nord Europe

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