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freetds - RE: [freetds] FreeTDS performance

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  • From: "Lowden, James K" <LowdenJK AT bernstein.com>
  • To: 'FreeTDS Development Group' <freetds AT lists.ibiblio.org>
  • Subject: RE: [freetds] FreeTDS performance
  • Date: Fri, 16 May 2003 13:07:05 -0400

> From: Bort, Paul [mailto:pbort AT tmwsystems.com]
> Sent: May 16, 2003 11:37 AM
>
> Also, what dirty tricks is Query Analyzer pulling under the hood?

None. What could it do? The answer has to come from the server. Windump
will confirm.

> You might want to try the command-line version (isql.exe) instead.

Apples and oranges. QA is ODBC over TDS 7.0 isql is a db-lib app using TDS
4.2, meaning the varchar data are represented as ASCII.

A better test would compare bcp.exe to freebcp, using native data formats.
That would bypass the binary->character conversions and the terminal I/O.
The last time I did such a test -- a couple of months ago, discussed in the
archives -- freebcp held its own against bcp.exe.

Our numeric->char conversion was inordinately slow, but Frediano since fixed
that. Money is now the bad guy, and I hope we'll solve that when we
eventually get Bill Thompson's 8-byte integer version working on both sides
of the Endian divide.

I'm at a loss to explain what Frediano's bumped into. I hope it turns out
to be --extra-checks or DMALLOC or something of that ilk.

--jkl
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