17233 - Poor performance with large DATA step and many missing values

Problem Note 17233: Poor performance with large DATA step and many missing values

When running a DATA step with many missing values on the HP-UX Itanium platform, you may see an extreme difference in running time when compared with the same process run on the HP-UX PA-RISC platform.

Development has determined that HP-UX PA-RISC uses a binary search method to identify which statement encountered the missing value, whereas HP-UX Itanium uses a linear search method.

Further investigation revealed that the Linux Itanium and Windows 64-bit platforms also use the linear search method.

Select the Hot Fix tab in this note to access the hot fix for this issue.

Operating System and Release Information

Product Family	Product	System	SAS Release
			Reported	Fixed*
SAS System	Base SAS	Microsoft® Windows® for 64-Bit Itanium-based Systems	9.1 TS1M3
		Linux on Itanium	9.1 TS1M3
		HP-UX IPF	9.1 TS1M3

* For software releases that are not yet generally available, the Fixed Release is the software release in which the problem is planned to be fixed.

A fix for SAS 9.1.3 (9.1 TS1M3) for this issue is available at:

http://www.sas.com/techsup/download/hotfix/e9_sbcs_prod_list.html#017233

A fix for SAS 9.1.3 (9.1 TS1M3) with Asian Language Support (DBCS) for this issue is available at:

http://www.sas.com/techsup/download/hotfix/e9_dbcs_prod_list.html#017233

Type:	Problem Note
Priority:	high

Date Modified:	2006-04-25 09:44:35
Date Created:	2006-03-11 21:19:51