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Re: [Bug-gnubg] linux

From: Philippe Michel
Subject: Re: [Bug-gnubg] linux
Date: Wed, 12 Apr 2017 22:22:29 +0200 (CEST)
User-agent: Alpine 2.21 (BSF 202 2017-01-01)

On Wed, 12 Apr 2017, Anders Persson wrote:

I think the gnu backgammon version in the ubuntu/mint program packages must
have been compiled badly in some way, because it's very very slow compared
to the windows version. Running the windows version in the Wine emulator on
the same Linux on the same computer is about 5 times faster on evaluation
than the native ubuntu version!

I can see something similar on a Ubuntu 16.04 VM : the gnubg from its package is about 4 times slower than one I compiled myself.

An obvious difference is that the package is set up to use only instructions available on all processors while my build detected that it could use more efficient ones that were available on this specific machine.

But in no way can this alone explain such a large discrepancy. The Ubuntu package must use some more onerous compilation options.

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