hg: hsx/hsx16/baseline: 6909480: Disable Escape Analysis in jdk6u18

Ben Evans ben.evans at db.com
Thu Dec 10 22:50:35 PST 2009

hotspot-dev-bounces at openjdk.java.net wrote on 11/12/2009 06:39:32:
> Yes, users will not be able to switch it on in jdk6u18.
> Currently it is still experimental optimization
> and it could produce incorrect results.

Can you be more specific, please. All our testing of this feature shows it 
as good-to-go.

Exactly what aspect of it is still troubling?
> Use early access jdk7 if you want to try it.

Been there, done that. 

EA shows consistent benefit of at least a few %, and we want to switch it 
on in production, and can't do that with a non Sun-supported build.

Please give us as much detail as you can (contact me offlist if necessary) 
- we'd really like to know what's caused this decision, and if possible 
see some code with corresponding PrintAssembly traces where errors could 


Ben Evans
eFX Algorithmic Trading
Deutsche Bank, London
Office: +44 (0)20 7541 3953


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