Re: speed of generic code in Ada (vs Java)

[Gautier <gautier@fakeaddress.nil>]

jhc0033@gmail.com wrote:

> So, if I write a, say, linear equation solver using generics in Ada,
> and then instantiate it with single precision, double precision,
> complex number single precision and complex number double precision,
> you'd expect it to be as fast as the equivalent non-generic versions?

Exactly. For my PhD research I used generics to fill matrices with Finite 
Element integrals, whatever the format. It allowed to use the band format and 
Lapack for some problems and a sparse format and a totally different solver for 
other problems. The compiler (DEC Ada, now HP Ada) allowed to share (or not) 
generic instantiations.
AFAIK, the GNAT compiler always expands generics like macros and never shares, 
so you have something as fast as a copy-paste-modify non-generic code.
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