Re: This is a software design question - ILE related

["Nathan M. Andelin" <nathanma@xxxxxxxxx>]

I wrote some code to test the performance of some of the suggestions you
folks have given me.

Since James Kilgore suggested putting the entire file in memory, I decided
to add that option to the mix.  I wrote a service program that exported 2
procedures:

getFromFile() - uses CHAIN to retrieve from file
getFromArray() - uses LOOKUP to retrieve from an array

The service program pre-loads a couple of arrays.  The first holds the file
key.  The second holds the return value.  The file also has only 2 fields
defined - the key and the lookup value.  Both file and array only held 256
records/entries.

I wrote a little program to call the procedures repetitively to test their
speed.  Each procedure was called 76,800 times.  Following are the results.

getFromFile() - 29 seconds
getFromArray() - 10 seconds

To test the speed of data queues I added a getFromQueue() procedure to the
service program and also wrote a "server" to receive a request from a queue,
then do an array lookup (since lookup was faster than chain), then put the
return value to a response queue.  Both queues were non-keyed.

The speed of getFromQueue() was 98 seconds.



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