Request for reviews (S): 7054211: No loop unrolling done in jdk7b144 for a test update() while loop

[Tom Rodriguez]

Though it might be nice to correct the comment to say that it helps crc32 and not CaffeineMark.

tom

On Sep 7, 2011, at 9:29 AM, Vladimir Kozlov wrote:

> http://cr.openjdk.java.net/~kvn/7054211/webrev
> 
> 7054211: No loop unrolling done in jdk7b144 for a test update() while loop
> 
> It is anti-delta of changes which removed code for CaffeineMark. A perf regression of approximately 13.5% was observed in benchmark with a pure java crc32 implementation which use XORs after that changes.
> 
> Our refworkload benchmarks are not affected by this fix (and that is why did original changes).
> 
> Thanks,
> Vladimir