Re: Program execution speed seems slow under RH 5.0 on

Jerry Feldman (gaf@zk3.dec.com)
Fri, 19 Dec 97 09:57:21 -0500

> Well, not a bad idea to get digital unix because the compiler is
> much better than gcc from what I hear. It's using global optimisation
> techniqes whereas gcc uses function-local optimisation only.
> The libraries may be better, too. (If you're heavily using mathematical
> functions).
> But of cause it's much more expensive, too.
> Or try EGCS, but don't expect too much.
Also, the Digital Unix compilers and assemblers perform code scheduling. That is they reorganize the instruction stream to eliminate stalls and to make better use of the processor. The scheduling is chip architecture dependent because latencies are different between the chips. On (hate to say it) NT, the NT assembler is a Digital Assembler with scheduling, but it is not available on Linux.
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Jerry Feldman Digital Unix Development Environment
Digital Equipment Corp. (work)gaf@zk3.dec.com (home)gaf@mediaone.net
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Nashua, NH 03062-9987 (603)884-2970, DTN:264-2970
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