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Re: Serious performance issues with 1.9.0

From: Neil Jerram
Subject: Re: Serious performance issues with 1.9.0
Date: Thu, 16 Jul 2009 08:59:42 +0100
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux)

Martin Ward <address@hidden> writes:

> Running a test program on Guile 1.8.7 takes 100 seconds CPU time.
> On Guile 1.9.0 (beta) the same program takes 237 seconds CPU time!

I wonder if that's because the code is being auto-compiled?  Do you
get a better result if you set environment variable GUILE_AUTO_COMPILE
to 0 ?

> For comparison:
> Gambit v4.4.4 takes 60 seconds.
> SCM version 5e5 takes 20.7 seconds.

We're working on it!

> Hobbit compiled code running under SCM takes 1.1 seconds!
> There was some talk a few years ago about integrating the Hobbit
> compiler with Guile: but nothing seems to have come of it.

No, that line of work fizzled out.  It may come back again in the more
general compilation and language transformation framework that we now


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