Re: [boost] uBLAS performance problem with CodeWarrior 8

From: Joerg Walter (jhr.walter_at_[hidden])
Date: 2002-06-26 14:00:47

----- Original Message -----
From: "David Abrahams" <david.abrahams_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Wednesday, June 26, 2002 4:54 PM
Subject: Re: [boost] uBLAS performance problem with CodeWarrior 8

>
> ----- Original Message -----
> From: "Joerg Walter" <jhr.walter_at_[hidden]>
>
> > Please check, whether the preprocessor symbol NDEBUG is defined. NDEBUG
> in
> > turn defines NUMERICS_USE_ET, which enables uBLAS release mode. uBLAS
> > distinguishes debug mode (size conformance checks enabled, expression
> > templates disabled) and release mode (size conformance checks disabled,
> > expression templates enabled).
>
> Are these separable settings?

Yes. I occasionally need to debug these expression templates ;-(

> I think I'd much prefer using expression
> templates always, even in (otherwise) debug builds...

Why? AFAIK using expression templates in debug builds increases compile
times and object file size (but I'll recheck that).

Regards

Joerg