*Synopsis*: ksh93 regresses 'uniq -c' performance
CR 6877392 changed on Mar 30 2010 by <User 1-9HOB9N>
=== Field ============ === New Value ============= === Old Value =============
See Also 6939349
====================== =========================== ===========================
*Change Request ID*: 6877392
*Synopsis*: ksh93 regresses 'uniq -c' performance
Product: solaris
Category: shell
Subcategory: korn93
Type: Defect
Subtype: Performance
Status: 7-Fix in Progress
Substatus:
Priority: 3-Medium
Introduced In Release: solaris_nevada
Introduced In Build: snv_128
Responsible Engineer: <User 1-5Q-9201>
Keywords: oss-request, oss-sponsor
=== *Description* ============================================================
As part of ksh93 update 2 project, uniq will be replaced with ksh93 internal
implementation. During perfomance testing we discovered that uniq in ksh93 is
slow. Upstream prepared bugfix already and it will be integrated in the next
sync with upstream.
*** (#1 of 1): 2009-08-31 09:18:30 GMT+00:00 <User 1-1SURPB>
=== *Public Comments* ========================================================
Updated synopsis per Roland's email to request-sponsor with message-id
<<email address omitted>>
[QUOTE]
Additonally CR #6877392 ("ksh93 regresses uniq performance") should be
fixed now (BTW: Can someone update the title to "ksh93 regresses 'uniq
-c' performance", please ? It was only the "-c" option which caused
trouble, in the normal mode the new "uniq" implementation both
outperformed the old "uniq" implementation and the GNU coreutils one...)
but we have to wait for the perf team to officially confirm this...
[ENDQUOTE]
*** (#1 of 3): 2009-09-21 04:32:57 GMT+00:00 <User 1-5Q-6276>
With the ksh93 snapshot of 2009-09-22 we're seeing the performance of
uniq -c go from being 340 seconds before to being about 60 seconds now.
internally one can view the results at:
http://perfwww.ireland/PITcompare/ksh93_integration_20090922_snapshot-compare.html
*** (#2 of 3): 2009-09-23 16:42:51 GMT+00:00 <User 1-5Q-5197>
To be clear:
'uniq -c 100' on a T1000:
Currently on b122: 200.25 seconds
with ksh93 20090922_snapshot: 59.28 seconds
70 % improvement
*** (#3 of 3): 2009-09-23 17:03:16 GMT+00:00 <User 1-5Q-5197>
=== *Workaround* =============================================================
=== *Additional Details* =====================================================
Targeted Release: solaris_nevada
Commit To Fix In Build: snv_137
Fixed In Build:
Integrated In Build:
Verified In Build:
See Also: 6939349
Duplicate of:
Hooks:
Hook1:
Hook2:
Hook3:
Hook4:
Hook5: <email address omitted>
Hook6: <email address omitted>
Program Management:
Root Cause: Another Bug Fix
Fix Affects Documentation: No
Fix Affects Localization: No
=== *History* ================================================================
Date Submitted: 2009-08-31 09:18:30 GMT+00:00
Submitted By: <User 1-1SURPB>
Status Changed Date Updated Updated By
3-Accepted 2009-08-31 09:33:30 GMT+00:00 <User 1-1SURPB>
7-Fix in Progress 2010-03-29 03:04:10 GMT+00:00 <User 1-5Q-9201>
=== *Service Request* ========================================================
Impact: Significant
Functionality: Primary
Severity: 2
Product Name: solaris
Product Release: solaris_nevada
Product Build: snv_125
Operating System: snv_125
Hardware: generic
Submitted Date: 2009-08-31 09:18:31 GMT+00:00
=== *Multiple Release (MR) Cluster* - 0 ======================================
