RFR (M) 8213753: SymbolTable is double walked during class unloading and clean up table timing in do_unloading

[Aleksey Shipilev]

On 1/30/19 8:41 PM, coleen.phillimore at oracle.com wrote:
> I added the timing for triggering cleanup.  It's likely not interesting.  The main cleanup time is
> code cache cleaning still.
> 
> This is my fastdebug timing:
> [4.992s][debug][gc,phases] GC(2) ClassLoaderData 0.016ms
> [4.992s][debug][gc,phases] GC(2) Trigger cleanups 0.010ms
> [5.039s][debug][gc,phases] GC(2) Class Unloading 47.290ms
> 
> open webrev at http://cr.openjdk.java.net/~coleenp/2019/8213753.02/webrev

Looks good.

-Aleksey