I just ran some tests, and was surprised by the results.
Caveats:
1) These are simple looping tests, and only give a general idea of speed.
YMMV.
2) Use the most reasonable variable type for the job. Converting a list to
an array to use array functions may negate any performance gains you may
see. If you are looking for a value, and you only know its name, use a
structure.
The tests:
I created a series of simple loop statements for each variable type:
Queries, Arrays, Structures, and Lists. They were all equivalent to a
2-dimensional array. Each "Set" loop consisted of 5000 iterations. I then
created another set of loops of 100 iterations to grab some values.
Summary:
I expected Structures to be fastest, but that honor went to Arrays.
Arrays are followed closely by Queries. Structures were a little slower,
and lists took *forever*. Structures are very powerful, and definitely have
performance gains if you are dealing with keys/values, but are not
inherently faster.
Results:
Query Set Time: 3515 ms
Query Get Time: 10 ms
----------------------------------------------------------------------------
----
Array Set Time: 3174 ms
Array Get Time: 10 ms
----------------------------------------------------------------------------
----
Struct Set Time: 5368 ms
Struct Get Time: 20 ms
----------------------------------------------------------------------------
----
List Set Time: 47248 ms
List Get Time: 711 ms
If anybody wants to see the test code, let me know and I'll mail it offlist.
If anybody else has done any testing, I would like to see those results as
well.
Chris Evans
[EMAIL PROTECTED]
http://www.fuseware.com
-----Original Message-----
From: Mike Amburn [mailto:[EMAIL PROTECTED]]
Sent: Thursday, June 01, 2000 10:21 AM
To: [EMAIL PROTECTED]
Subject: RE: Another question on performance -- better than lists?
> ok... so when it comes to performance, it's better to use
> strutctures than
> arrays and both of those are better than lists.
i thought lists were always fastest. is this not true? when did this happen?
mike
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