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Date: Wed, 26 Mar 1997 07:51:46 -0800
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From: "William M. Perry" <wmperry@aventail.com>
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To: Per Abrahamsen <abraham@dina.kvl.dk>
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Subject: Speed (was Re: NEWS submission)
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Per Abrahamsen writes:
>
>"William M. Perry" <wmperry@aventail.com> writes:
>
>> Adrian Aichner writes:
>> >>>>>> "Hrv" == Hrvoje Niksic <hniksic@srce.hr> writes:
>> >
>> >    Hrv> "William M. Perry" <wmperry@aventail.com> writes:
>> >    >> - Much much much faster
>> >
>> >    Hrv> How much is this?  For example, how long does it take to
>> >    Hrv> render <URL:http://fly.cc.fer.hr/HTML3/WD-css1.html> on a
>> >    Hrv> computer humans can afford?  That URL used to be my
>> >
>> >This is date for a 110MHz SPARCstation 5 running Solaris2.5 with
>> >64Mbyte memory. This is a computer the company I work for can afford,
>> >not me :-(
>> 
>>   This is a PPRO/200 w/32M of memory, a machine people can pretty easily
>> afford ($3k).  I also use a 586/100 laptop, which damn near anyone can
>> afford ($1500 5 months ago)
>
>Perhaps.  I'm using an machine identical to Adrian's (110MHz SPARCstation
>5 running Solaris2.5 with 64Mbyte memory).  The html file is copied to a
>local (not NFS) disk first.
>
>Here parsing takes about 15 seconds, and drawing .. well, it is 19 minutes
>since it started, and it is not finished yet, so I'll believe Adrian's
>number.

  I don't see how these gigantic discrepancies could be Emacs-W3's fault.
Unless your X server sucks and querying fonts is abominably slow.

  Are either of you running a XEmacs with debugging or error checking
turned on?  Emacs-W3 makes extensive use of extents, and this is where you
get hammered a lot with error checking turned on.

>If I use Emacs 19.34 instead of XEmacs on the same machine.  parsing
>takes 6 seconds, and drawing one minute.
>
>Something is very wrong with XEmacs performance.
>
>If I use a 200 MHz UltraSPARC instead (comparable to a PPRO 200 MHz) the
>parsing and drawing time are cut to a third.  This makes w3 on Emacs 19.34
>usable.

  Could there be something architecture-specific that would account for
this incredible slowdown?  Anyone else see ridiculous timings like this?

-Bill P.

