From max at openchat.com  Fri May 25 11:31:27 2012
From: max at openchat.com (Max Mikhanosha)
Date: Fri, 25 May 2012 07:31:27 -0400
Subject: [cl-store-devel] optimizing default backend
Message-ID: <87txz433ao.wl%max@openchat.com>

Is there any interest in having following type enhancement to default
backend, and will a patch implementing it be considered?

* Introduce buffering by an having an (UNSIGNED-BYTE 8) array
  bound to a global (similar to the circularity hashes)

* Replace every WRITE-BYTE with an inline wrapper that buffers into
  the above array, and calls a generic FLUSH-STORE-BUFFER when its full

* Default FLUSH-STORE-BUFFER method will call write-sequence

Above was brought on by disappointing timings of using CL-STORE to
serialize to files vs serializing to in-memory streams under
SBCL. Tried both flexi-streams and babel-streams, and it seems writing
to files directly is around 3x times faster then writing to in-memory
streams

Regards,
  Max



From leslie.polzer at gmx.net  Wed May 30 15:03:21 2012
From: leslie.polzer at gmx.net (Leslie P. Polzer)
Date: Wed, 30 May 2012 17:03:21 +0200
Subject: [cl-store-devel] optimizing default backend
In-Reply-To: <87txz433ao.wl%max@openchat.com>
References: <87txz433ao.wl%max@openchat.com>
Message-ID: <20120530150321.3020@gmx.net>


Max Mikhanosha wrote:
> Is there any interest in having following type enhancement to default
> backend, and will a patch implementing it be considered?
> 
> * Introduce buffering by an having an (UNSIGNED-BYTE 8) array
>   bound to a global (similar to the circularity hashes)
> 
> * Replace every WRITE-BYTE with an inline wrapper that buffers into
>   the above array, and calls a generic FLUSH-STORE-BUFFER when its full
> 
> * Default FLUSH-STORE-BUFFER method will call write-sequence
> 
> Above was brought on by disappointing timings of using CL-STORE to
> serialize to files vs serializing to in-memory streams under
> SBCL. Tried both flexi-streams and babel-streams, and it seems writing
> to files directly is around 3x times faster then writing to in-memory
> streams

I'm enthusiastic about it! Please show us your patch and I will be happy
to review and apply it.

  Leslie
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