RFR(S) 8240205: Avoid PackageEntry lookup when loading shared classes

[Claes Redestad]

Looks good to me!

/Claes

On 2020-04-03 02:58, Calvin Cheung wrote:
> RFE: https://bugs.openjdk.java.net/browse/JDK-8240205
> webrev: http://cr.openjdk.java.net/~ccheung/jdk15/8240205/webrev.00/
> 
> During loading of a shared class from a CDS archive, the PackageEntry is 
> being looked up in several places within the same call stack. This RFE 
> is to do the PackageEntry lookup at one place and then pass it along to 
> the subsequently called functions which need it.
> 
> Perf improvement on loading approx. 2000 classes on linux:
> 
> instr delta = -17930620 -0.6155%
> time delta = -6.311 ms -0.7516%
> 
> Passed tiers1 - 4 testing.
> 
> thanks,
> 
> Calvin
> 
>