<i18n dev> RFR :8023563: Bottleneck in java.util.TimeZone.getDefaultInAppContext

Seán Coffey sean.coffey at oracle.com
Mon Sep 2 11:06:49 PDT 2013

This might be a slightly easier one to read. (fast path logic code first)



On 02/09/13 16:47, Seán Coffey wrote:
> Performance regression reported where a high number of threads calling 
> TimeZone.getDefault can run into a bottleneck on AppContext accessor 
> calls. The bug ID is 8023563 but it's not visible on bugs.sun.com yet.
> Turns out that we're unnecessarily going through the AppContext in 
> certain scenarios. Main aim is to use AppContext when using applets. 
> We should check for presence of security manager (along with loading 
> for AppContext class) in such cases.
> http://cr.openjdk.java.net/~coffeys/webrev.8023563/webrev/
> This fix is not applicable to jdk8 as new code is currently being 
> worked on there which eliminates AppContext use.
> Regards,
> Sean.

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