[cfe-commits] r125756 - in /cfe/trunk: include/clang/AST/DeclBase.h lib/AST/DeclBase.cpp

[Chris Lattner]

On Feb 18, 2011, at 7:36 AM, Douglas Gregor wrote:

>> Is there any speed difference ?
> 
> 
> I finally got around to measuring this, and unfortunately, there appears to be a performance loss of about 2% on Cocoa.h. Interesting that we got a win from devirtualizing the Stmt/Expr hierarchy, while we ended up with a loss here... probably because we hit the virtuals in the Decl hierarchy far more often in Sema.
> 
> Anyway, thanks for the prod. 2% speed loss for 3.5% memory improvement isn't worthwhile, IMO, so I'll see about backing out these changes.

Do you know what is causing the performance regression?

-Chris