Scratch that, should read things more carefully, obviously 2 hours sleep is not
enough.
Cheers,
Andy
From: andy baum andyb...@yahoo.co.uk
To: U2 Users List u2-users@listserver.u2ug.org
Sent: Thursday, 8 December 2011, 7:52
Subject: Re: [U2] End of Month date routine
Stuart,
You are getting the performance from the case statement by having
case mod(YEAR,4) ; LEAP.YEAR = @false
first, unfortunately when using case, the order is important and this needs to
go just before the case @true. In your example
case mod(YEAR,400); LEAP.YEAR = @false
will never be happen as it will already have been picked up by the previous case
Cheers,
Andy
From: Boydell, Stuart stuart.boyd...@spotless.com.au
To: U2 Users List u2-users@listserver.u2ug.org
Sent: Thursday, 8 December 2011, 6:44
Subject: Re: [U2] End of Month date routine
On UV the vlist would indicate yes (the complete expression is processed) .
LEAP.YEAR = NOT(MOD(YEAR,4)) AND (NOT(MOD(YEAR,400)) OR MOD(YEAR,100))
00062 : 0F6 mod YEAR 4 = $R1
0006A : 10E not $R1 = $R2
00070 : 0F6 mod YEAR 400 = $R3
00078 : 10E not $R3 = $R4
0007E : 0F6 mod YEAR 100 = $R5
00086 : 122 or $R4 $R5 = $R6
0008E : 008 and $R2 $R6 = LEAP.YEAR
00096 : 190 stop
I get minuscually better results using a case statement:
YEAR = oconv(THE.DATE, 'dy')
begin case
case mod(YEAR,4) ; LEAP.YEAR = @false
case mod(YEAR,100); LEAP.YEAR = @true
case mod(YEAR,400); LEAP.YEAR = @false
case @true ; LEAP.YEAR = @true
end case
-Original Message-
From: u2-users-boun...@listserver.u2ug.org
[mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Wjhonson
Sent: Thursday, 8 December 2011 15:02
To: andyb...@yahoo.co.uk; u2-users@listserver.u2ug.org
Subject: Re: [U2] End of Month date routine
Why couldn't you say
LEAP.YEAR = NOT(MOD(YEAR,4)) AND (NOT(MOD(YEAR,400)) OR MOD(YEAR,100))
Would the system process the whole line even on an initial finding of False ?
-Original Message-
From: andy baum andyb...@yahoo.co.uk
To: U2 Users List u2-users@listserver.u2ug.org
Sent: Wed, Dec 7, 2011 7:25 pm
Subject: Re: [U2] End of Month date routine
Seem to have lost a bit of last reply which should have read
Ran Dan's test code on latest Windows PE version of Universe and got :-
9.788
1.558
1.474
3.412
Tried
NOT(MOD(YEAR,400)) OR(NOT(MOD(YEAR,4)) AND MOD(YEAR,100))) which took 2.181
seconds but the fastest I could get was
LEAP.YEAR = NOT(MOD(YEAR,4))
IF LEAP.YEAR THEN
LEAP.YEAR = (NOT(MOD(YEAR,400)) OR MOD(YEAR,100)) END
which took 1.423 seconds
Got the same trend, although different timings on our Solaris 10 box running
Universe 10.3.6
Cheers,
Andy
From: Daniel McGrath dmcgr...@rocketsoftware.com
To: dgr...@dagconsulting.com dgr...@dagconsulting.com; U2 Users List
u2-users@listserver.u2ug.org
Sent: Wednesday, 7 December 2011, 18:57
Subject: Re: [U2] End of Month date routine
I added the code to PasteBin so as to not flood here:
http://pastebin.com/JMyqhFud
I did a few more than 100K and I cut the OCONV step out from all of them. I
took the liberty to adjust Will's version to return correct results. The
results I got, in order, was:
16.872
2.804
2.384
5.561
So, if you have a need to account for your milliseconds, the slightly optimized
Wikipedia algorithm seems to be the fastest.
Interested to see if there are any better? (Or if I made any mistakes...)
Regards,
Dan
-Original Message-
From: u2-users-boun...@listserver.u2ug.org
[mailto:u2-users-boun...@listserver.u2ug.org]
On Behalf Of David A. Green
Sent: Wednesday, December 07, 2011 10:48 AM
To: 'U2 Users List'
Subject: Re: [U2] End of Month date routine
Who wants to take each of the Leap Year calculations and put them into
different subroutines and loop 100K times and see which one is faster using
profiling?
David A. Green
(480) 813-1725
DAG Consulting
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