Re: 01/02: Re-implement (ice-9 streams) in terms of (srfi srfi-41)

[Mark H Weaver]

Andy Wingo <address@hidden> writes:

> wingo pushed a commit to branch master
> in repository guile.
>
> commit aead655a45e689b332cfd148ecbb6d764e2c8eb8
> Author: Andy Wingo <address@hidden>
> Date:   Thu Mar 5 09:44:53 2015 +0100
>
>     Re-implement (ice-9 streams) in terms of (srfi srfi-41)
>     
>     * module/ice-9/streams.scm: Re-implement in terms of SRFI-41.  Passes
>       tests.

I think we can't do this because (ice-9 streams) are based on native
Guile promises which provide built-in thread synchronization, whereas
SRFI-41 streams are based on SRFI-45 promises which do not include
thread synchronization.

I vaguely remember finding that SRFI-45 promises (written in pure
Scheme) performed better than native Guile promises (written in C),
presumably because of the lack of built-in thread synchronization.  I
don't remember what platform I did those comparisons on.

     Mark