Review request for JDK-8035948 - Redesign property listeners for shared classes

[A. Sundararajan]

+1

Copyright year in this file has to be 2014.

http://cr.openjdk.java.net/~hannesw/8035948/webrev.00/src/jdk/nashorn/internal/runtime/PropertyListeners.java.html

-Sundar

On Thursday 27 February 2014 10:52 PM, Hannes Wallnoefer wrote:
> Please review JDK-8035948 - Redesign property listeners for shared 
> classes:
>
> http://cr.openjdk.java.net/~hannesw/8035948/
>
> This prepares property maps and property listeners to work better with 
> classes that are reused between JS environments. The central ideas are:
>
>  - Reuse property maps between globals in order to minimize polymorphism.
>  - Use SoftReferences for property map history to avoid memory leaks
>  - Redesign property listeners to be attatched to property maps only 
> since ScriptObjects are specific to one JS environment.
>  - Reduce number of property listeners by only creating them when 
> needed (when a callsite accesses an inherited property).
>  - Reduce number of prototype history lookups in property maps by 
> using a unique combination of prototype/property maps from the start.
>
> Actual class sharing functionality is coming in a later webrev. Let me 
> know if you have any questions about this.
>
> Hannes