VISA Find Resource primitive runs much slower on OS X compared to Windows

Hello Everyone,
We have a large application that is built with LabVIEW 2014 64-bit that calls the "VISA Find Resource" primitive in a While Loop as the basis for automatic hardware discovery.
On Windows, everything works fine. However, we just started using LabVIEW for OS X to build our application for Mac and I noticed that the "VISA Find Resource" primitive executes about 10 times slower. This causes a handful of issues in our application since things were coded around this assumption that this primitive would execute very quickly.
I wrote a VI in LabVIEW 2014 64-bit that I've run on both a Windows 7 64-bit machine and several Mac computers running Yosemite. The VI runs this primitive in a while loop which stops after the user-defined number of iterations have been performed and gathers timing statistics. I've attached this VI for reference. Below are the screenshots of the VI after running them on OS X Yosemite vs Windows 7 with the VISA Find Resources running 10,000 times.
As you can see, the front panel displays the current iteration number (Loops), the current millisecond measurement during a loop, the mean millisecond measurement for the number of loops so far, the standard deviation, and variance. What I can see is that the standard deviation and variance are very similar across both platforms. It's just that for some reason the VISA Find Resources primitive runs slower on OS X Yosemite at about 6.5ms per execution vs Windows at 0.73ms per execution. I've also run this VI on a Mac Mini running Mavericks with nearly identical results (mean time of 6.5ms). As I mentioned before, this primitive taking about 10 times longer to execute really hinders the performance of our application.
Is this a known issue for LabVIEW or VISA for OS X? Is there any way to get performance comparable to Windows on OS X?
Thanks!
Attachments:
VISA Timings.vi ‏14 KB

There is one serious difference between these two examples that could at least partially cause some of that difference. On the Mac you have 6 or so resources that satisfy the request, on Windows none. It's not exactly a fair comparison that way.
VISA Find Resource on Windows can be slow too, if there are quite some VISA resources to scan. In fact I consider 6 ms runtime for VISA Find Resource a damn fast execution time. I had in the past easily execution times of several seconds when searching for ASRL (serial) resources. And that was on Windows.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

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Attachments:
Show VISA Accessible.PNG ‏84 KB
Tulip Passport.PNG ‏15 KB

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23 22 INDEX (RANGE SCAN) OF 'SUBLEDGER_ENTRY_I
2' (NON-UNIQUE) (Cost=1069 Card=328303)
24 21 TABLE ACCESS (FULL) OF 'HORIZON_SUBLEDGER_
LINK' (Cost=14314 Card=9235474 Bytes=184709480)
Statistics
25 recursive calls
18 db block gets
343266 consistent gets
370353 physical reads
0 redo size
15051 bytes sent via SQL*Net to client
1007 bytes received via SQL*Net from client
34 SQL*Net roundtrips to/from client
1 sorts (memory)
1 sorts (disk)
491 rows processed
in test
SQL> set autotrace traceonly
SQL> SELECT rpt_horizon_subledger_entry_vw.onst_offst_cd,
2 rpt_horizon_subledger_entry_vw.bkng_prd,
3 rpt_horizon_subledger_entry_vw.systm_afflt_cd,
4 rpt_horizon_subledger_entry_vw.jrnl_id,
5 rpt_horizon_subledger_entry_vw.ntrl_accnt_cd,
rpt_horizon_subledger_entry_vw.gnrl_ldgr_chrt_of_accnt_nm,
6 7 rpt_horizon_subledger_entry_vw.lgl_entty_brnch_cd,
8 rpt_horizon_subledger_entry_vw.crprt_melob_cd AS corp_mlb_cd,
9 rpt_horizon_subledger_entry_vw.onst_offst_cd, SUM (amt) AS amount
10 FROM rpt_horizon_subledger_entry_vw
11 WHERE rpt_horizon_subledger_entry_vw.bkng_prd = '092008'
12 AND rpt_horizon_subledger_entry_vw.jrnl_id = 'RCS0002100'
AND rpt_horizon_subledger_entry_vw.systm_afflt_cd = 'SAFF01'
13 14 GROUP BY rpt_horizon_subledger_entry_vw.onst_offst_cd,
15 rpt_horizon_subledger_entry_vw.bkng_prd,
16 rpt_horizon_subledger_entry_vw.systm_afflt_cd,
17 rpt_horizon_subledger_entry_vw.jrnl_id,
18 rpt_horizon_subledger_entry_vw.ntrl_accnt_cd,
rpt_horizon_subledger_entry_vw.gnrl_ldgr_chrt_of_accnt_nm,
rpt_horizon_subledger_entry_vw.lgl_entty_brnch_cd,
rpt_horizon_subledger_entry_vw.crprt_melob_cd,
rpt_horizon_subledger_entry_vw.onst_offst_cd; 19 20 21 22
no rows selected
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=92944 Card=708 Bytes
=53100)
1 0 SORT (GROUP BY) (Cost=92944 Card=708 Bytes=53100)
2 1 VIEW OF 'RPT_HORIZON_SUBLEDGER_ENTRY_VW' (Cost=92937 Car
d=708 Bytes=53100)
3 2 SORT (UNIQUE) (Cost=92937 Card=708 Bytes=124962)
4 3 UNION-ALL
5 4 HASH JOIN (Cost=46456 Card=354 Bytes=60180)
6 5 TABLE ACCESS (FULL) OF 'SUBLEDGER_CHART_OF_ACCOU
NT' (Cost=2 Card=57 Bytes=1881)
7 5 NESTED LOOPS (Cost=46453 Card=354 Bytes=48498)
8 7 HASH JOIN (Cost=11065 Card=17694 Bytes=1362438
9 8 HASH JOIN (Cost=27 Card=87 Bytes=5133)
10 9 TABLE ACCESS (FULL) OF 'HORIZON_LINE' (Cos
t=24 Card=87 Bytes=2175)
11 9 TABLE ACCESS (FULL) OF 'GNRL_LDGR_CHRT_OF_
ACCNT' (Cost=2 Card=111 Bytes=3774)
12 8 TABLE ACCESS (FULL) OF 'HORIZON_SUBLEDGER_LI
NK' (Cost=11037 Card=142561 Bytes=2566098)
13 7 TABLE ACCESS (BY INDEX ROWID) OF 'SUBLEDGER_EN
TRY' (Cost=2 Card=1 Bytes=60)
14 13 INDEX (UNIQUE SCAN) OF 'SUBLEDGER_ENTRY_PK'
(UNIQUE) (Cost=1 Card=1)
15 4 HASH JOIN (Cost=46456 Card=354 Bytes=64782)
16 15 TABLE ACCESS (FULL) OF 'SUBLEDGER_CHART_OF_ACCOU
NT' (Cost=2 Card=57 Bytes=1881)
17 15 NESTED LOOPS (Cost=46453 Card=354 Bytes=53100)
18 17 HASH JOIN (Cost=11065 Card=17694 Bytes=1362438
19 18 HASH JOIN (Cost=27 Card=87 Bytes=5133)
20 19 TABLE ACCESS (FULL) OF 'HORIZON_LINE' (Cos
t=24 Card=87 Bytes=2175)
21 19 TABLE ACCESS (FULL) OF 'GNRL_LDGR_CHRT_OF_
ACCNT' (Cost=2 Card=111 Bytes=3774)
22 18 TABLE ACCESS (FULL) OF 'HORIZON_SUBLEDGER_LI
NK' (Cost=11037 Card=142561 Bytes=2566098)
23 17 TABLE ACCESS (BY INDEX ROWID) OF 'SUBLEDGER_EN
TRY' (Cost=2 Card=1 Bytes=73)
24 23 INDEX (UNIQUE SCAN) OF 'SUBLEDGER_ENTRY_PK'
(UNIQUE) (Cost=1 Card=1)
Statistics
1134 recursive calls
0 db block gets
38903505 consistent gets
598254 physical reads
60 redo size
901 bytes sent via SQL*Net to client
461 bytes received via SQL*Net from client
1 SQL*Net roundtrips to/from client
34 sorts (memory)
0 sorts (disk)
0 rows processed
Thanks a lot in advance
Jerry

Hi
Basically there are two kinds of tables
- fact
- lookup
The number of records in a lookup table is usually small.
The number of records in a fact table is usually huge.
However, in test systems the number of records in a fact table is often also small.
This results in different execution plans.
I notice again you don't post version and platform info, and you didn't make sure your explain is properly idented
Please read the FAQ to make sure it is properly idented.
Also using the word 'buddies' is as far as I am concerned nearing disrespect and rudeness.
Sybrand Bakker
Senior Oracle DBA

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I am trying to use Agilent 82357B GPIB device with LabVIEW for instrument control.
I have checked:
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2.       Enable NIVISATulip.dll in NI Max Explorer
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With NI USB GPIB device, the same code above can find attached instruments as below, where GPIB1 is the Agilent device and GPIB0 is the NI device.
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Solved!
Go to Solution.

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Firefox runs much slower with the new download of version 3.6.8

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I have an iPad 2 that ran perfectly under iOS7, but when I upgraded to iOS8 it runs much slower and is barely usable. I have a 16GB model with about 5GB available storage. Do I just need to get a new iPad or is there some way to keep my current iPad running with a reasonable response time under iOS8?

See this cool mp3 xml player with visualization, playlist and
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My macbook pro is running very slow with some strange mouse and window movements. The trackpad is very unresponsive and when responding the cursor moves on its own and/or very erratically. When on safari the window suddenly zooms in or highlights words and looks them up via dictionary. I currently have a wireless mouse connected and I am still having the same problems.
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Very worried!!

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2. Restart the computer in Safe Mode, then restart again, normally. If this doesn't help, then:
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     after the chime press and hold down the OPTION key until the boot manager screen appears.
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     Reinstall the 10.9.2 update: OS X Mavericks 10.9.2 Update (Combo).
4. Reinstall Lion/Mountain Lion, Mavericks: Reboot from the Recovery HD. Select Reinstall Lion/Mountain Lion, Mavericks from the Utilities menu, and click on the Continue button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
Reinstall the 10.9.2 update: OS X Mavericks 10.9.2 Update (Combo).

VISA Find Resource primitive runs much slower on OS X compared to Windows

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