Optimization of conditional access to globals: thread-unsafe?

[Robert Dewar]

Michael Matz wrote:

> 456.hmmer is not a small benchmark, but a real world scientific 
> application for protein sequence analysis using hidden markov models.  It 
> just so happens that it also is a standardized benchmark in cpu2006.

A single data point is not data in the sense I refer to. What you want
is cumulated data over a significant body of real code. That's not
normally a requirement for optimizations, but to me it is for one
like this that is disruptive.

The fact that you have an optimization that can help in an individual
case *may* be justification for making it an option, but it is 
definitely not justification for making it the default when it
is disruptive.
> 
> 
> Ciao,
> Michael.