Understanding Efficiency Trade-offs
As you optimize SAS programs, it is important to understand
that there are trade-offs. Decreasing the use of one resource frequently
increases the use of another. The following table shows examples of
some common efficiency trade-offs.
|
Decreased Use of This
Resource
|
Result: Possible Increased
Use of This Resource
|
|---|---|
|
disk space
 |
CPU time
 |
|
I/O (by reading or writing
more data at one time)
 |
memory
 |
|
real time (by enabling
threading in SAS 9)
 |
CPU time
|
As these trade-offs
illustrate, there is no single best way to optimize a SAS program.
It depends on your situation. However, this chapter and the following
chapters provide information that can help you determine which programming
techniques are most efficient in your environment.
..................Content has been hidden....................
You can't read the all page of ebook, please click here login for view all page.