XOM API for Processing XML with Java

[Wolfgang Hoschek <whoschek AT lbl.gov>]

On Nov 29, 2004, at 3:08 PM, Elliotte Harold wrote:

> Wolfgang Hoschek wrote:
>
> > I think the URICache in Verifier was very good the way you had it.
> > The lastet CVS improvement also checks for equals(). I think that's a 
> > step back when you look at it from the point of lock contention in 
> > multi-threaded environments. You need to keep any work inside static 
> > synchronized blocks as brief as possible to avoid lock contention 
> > becoming an issue. So I'd happily trade 10% performance improvement 
> > for strongly reduced lock contention, leading to much better 
> > scalability. The URIs are almost always constants anyway...
>
> The problem is in testing I noticed we were missing the cache a lot 
> more often than I expected because of multiple, non-interned namespace 
> URIs. I'm not sure where they were all coming from but they were 
> there, so I checked for == first and equals() only on cache miss.

Sounds like an issue worthwhile to cross-check with the xerces folks.