RFR: 8213035: Pack MethodHandleInlineStrategy coder and length into a long

Mandy Chung mandy.chung at oracle.com
Mon Oct 29 19:16:44 UTC 2018

On 10/29/18 8:17 AM, Claes Redestad wrote:
> Hi,
> by packing the coder and length values into a long, and combining the 
> length and coder mixers, we can reduce the number of MHs generated to 
> set up String concatenations.
> Theoretically we reduce the number of MHs created by up to a third, 
> and real time improvements in startup tests exercising ISC typically 
> hover around 10%. This optimization reverts JDK-8212597[1], so 
> expressions that benefited from that of course sees a smaller or no 
> added benefit.
> http://cr.openjdk.java.net/~redestad/8213035/jdk.00/
> https://bugs.openjdk.java.net/browse/JDK-8213035

This looks okay to me.


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