[freetds] FreeTDS performance

Lowden, James K LowdenJK at bernstein.com
Fri May 16 13:07:05 EDT 2003

> 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.  

The information contained in this transmission may contain privileged and confidential information and is intended only for the use of the person(s) named above. If you are not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, any review, dissemination, distribution or duplication of this communication is strictly prohibited. If you are not the intended recipient, please contact the sender immediately by reply e-mail and destroy all copies of the original message. Please note that we do not accept account orders and/or instructions by e-mail, and therefore will not be responsible for carrying out such orders and/or instructions.

More information about the FreeTDS mailing list