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PSPP-BUG: [bug #20910] GUI becomes extremely slow after executing syntax

From: Ben Pfaff
Subject: PSPP-BUG: [bug #20910] GUI becomes extremely slow after executing syntax which doesn't read the data
Date: Mon, 17 Sep 2007 03:51:17 +0000
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20061205 Iceweasel/ (Debian-

Follow-up Comment #10, bug #20910 (project pspp):

>What do you think of this approach?

It's good.  I don't know why I had mentally discarded this idea.  A serial
number protocol works fine.

But: I didn't like the idea of adding a new field to every casereader for
something so rare.  I tried hard to keep down the size of struct casereader to
a bare minimum, because I don't want anyone to hesitate to use the casereader
mechanism because of time or space overhead.  So, let me propose the -6 patch
now attached (also an interdiff to show what changed) which avoids putting a
serial number on every casereader.

Does this look OK to you?

(file #13964, file #13965)

Additional Item Attachment:

File name: datasheet-speedup-6.patch      Size:14 KB
File name: datasheet-speedup-5-6.interdiff Size:12 KB


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