8179527: Ineffective use of volatile hurts performance of Charset.atBugLevel()

[Claes Redestad]

On 2017-06-27 09:01, Alan Bateman wrote:
> It might be better if we can just remove the test from 
> Charset.checkName as I think that dates back to an incompatible change 
> going from JDK 1.4 to JDK 5 that should no longer be a concern. 

The check of Charset.atBugLevel in checkName should no longer happen for 
the majority of situations, as that test is now only done if the charset 
name is "" (see https://bugs.openjdk.java.net/browse/JDK-8174831), since 
what differs between 1.4 and 1.5 was apparently whether or not the empty 
string was to be accepted as a valid Charset...

So yes, if we can get rid of the test altogether, we'll be even better off!

/Claes