topic Re: When I want to compare two or more methods, what is the important? in Statistical Procedures

When I want to compare two or more methods, what is the important?

AndersS — Tue, 10 May 2022 19:13:08 GMT

When I want to compare two or more methods, what is the important?

Shall I use USER CPU TIME or SYSTEM CPU TIME ?

Shall I use Memory OR OS memory?

See the text below (provided by options FULLSTIMER)

My method will not use a lot of memory – because I do not use sort very much.

Cpu time for My method – I do not know quite yet.

My guess: USER CPU Time and perhaps Memory. See below.

real time 0.02 seconds

user cpu time 0.00 seconds ß

system cpu time 0.01 seconds ß

memory 7285.46k ß

OS Memory 35788.00k ß

Timestamp 2022-05-06 03:51:12 em

Step Count 478 Switch Count 4

Page Faults 0

Page Reclaims 1676

Page Swaps 0

Voluntary Context Switches 70

Involuntary Context Switches 0

Block Input Operations 0

Block Output Operations 264

Re: When I want to compare two or more methods, what is the important?

SASKiwi — Tue, 10 May 2022 22:14:30 GMT

What is important to you regarding SAS performance statistics is entirely up to you.

If a SAS job is taking hours to run and you want it to run quicker then real time (elapsed time) and CPU time will be important. If a SAS job fails because it has run out of memory then the Memory usage will be important.

Re: When I want to compare two or more methods, what is the important?

AndersS — Thu, 12 May 2022 09:22:56 GMT

Hi! USER CPU time and USER memory are the two measures, in classical reporting.
Of course Accuracy, not failing are important.
There does not seen to be a straight forward way of comparing two methods.

Re: When I want to compare two or more methods, what is the important?

AndersS — Tue, 31 May 2022 14:47:35 GMT

Hi!

I have now been using CARY SAS CAS for some computing.

Result: In my opinion BOTH "User CPU time" and "System CPU time" must be used, when you want to add the resources used for a method.

user cpu time 1.23 seconds

system cpu time 4.56 seconds

To only use "User CPU time" will underestimate the total amount of resources used.
/Br Anders