RE: If %Open() vs CLOSE(E)

[Buck Calabro <buck.calabro@xxxxxxxxxxxxxxxxx>]

Mark Lazarus wrote:

>Which is more efficient: "If %Open()" or CLOSE(E) ?

Here's the code:

fMaster    IF   E           K Disk    usropn      
                                                  
d LIMIT           s             10u 0 inz(10000)  
d bTimeT          s               t               
d eTimeT          s               t               
d dSecsT          s             10i 0             
d bTimeE          s               t               
d eTimeE          s               t               
d dSecsE          s             10i 0             
                                                  
 * time if open test                              
c                   time                    bTimeT
c                   do        LIMIT               
c                   if        %open(master)       
c                   close     master              
c                   endif                         
c                   open      master              
c                   enddo                         
c                   time                    eTimeT
                                                  
 * time fall over test                                
c                   close(e)  master                  
c                   time                    bTimeE    
c                   do        LIMIT                   
c                   close(e)  master                  
c                   open      master                  
c                   enddo                             
c                   time                    eTimeE    
                                                      
c     eTimeT        subdur    bTimeT        dSecsT:*s 
c     eTimeE        subdur    bTimeE        dSecsE:*s 
                                                      
c     dSecsT        dsply     'BUCK'                  
c     dSecsE        dsply     'BUCK'                  
c                   eval      *inlr = *on                    

Here are the results:
Pass loops %open close(e)
  1  10000   88     93    - journaled (opnclo)
  2  10000   85     79    - not journaled
  3  10000   85     86    - not journaled
  4  10000   80     79    - journaled (omit opnclo)
  5  10000   81     78    - journaled (omit opnclo)

Apparently there isn't much difference.

Buck Calabro
Aptis; Albany, NY
"Nothing is so firmly believed as
 that which we least know" -- Michel Montaigne
Visit the Midrange archives at http://www.midrange.com
+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to MIDRANGE-L@midrange.com.
| To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---