RE: buffering

["Richard Jackson" <richardjackson@xxxxxxxxxxxxxxxxxx>]

I think that you could get it fast more quickly in C but there aren't any
facilities in C that you can't use in MI.  I always found that writing IO in
MI to be a pain.  However, I have a suggestion for you:

When you execute the IO that pulls in the 128k block from the file, take the
address of the beginning of the block from the IO feedback area and just
copy the whole thing directly into the user space - in other words, don't
bother to read anything into a buffer, just copy it directly from the VMC
buffer.  Is there something that will copy more than 32k at a time or are
you stuck with CPYBLA?  If not, you have to make four operations.

Richard Jackson
mailto:richardjackson@richardjackson.net
http://www.richardjacksonltd.com
Voice: 1 (303) 808-8058
Fax:   1 (303) 663-4325

-|-----Original Message-----
-|From: owner-mi400@midrange.com [mailto:owner-mi400@midrange.com]On
-|Behalf Of Leif Svalgaard
-|Sent: Saturday, October 07, 2000 2:52 PM
-|To: MI400@midrange.com
-|Subject: Re: buffering
-|
-|
-|Thanks, Richard.
-|As always you come through with good stuff.
-|
-|Language:  why, MI, of course.  :-)
-|
-|>
-|> Are you using Dick's new sort APIs?
-|
-|No, a search for "Dick's new sort API" on IBM's sites
-|did not turn up anything.
-|
-|
-|
-|
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