Re: CGI vs JSP...

["Seth Newton" <snewton@xxxxxxxxxxxxxxxxx>]

Mel,

I wrongly assumed that if I comment out wrtjobdbg(*on), it would turn off
debugging.  

As you suggested, I added a named activation group and made a call to
setnodebug(*on).  The CGIDEV2 response in my test page now ranges from 4 to
5 seconds as I refresh, compared to the 8 to 10 seconds previously.  

Indeed I am not trying to knock anyone down and I think CGIDEV2 is a great
free alternative, just as RPGsp is a great commercial alternative.  What I
was trying to do is measure the speed of CGI in general, and draw a
comparison to JSPs.


Joe,

I have had experience coding Java, but not JSPs.  However, I have seen other
developer's JSPs run slow compared to RPG.

I have yet to try the thin layer of JSP/servlets over RPG business logic.
This can be my next thing to learn and experiment with.  If you would like,
Joe, we could try and compare the JSP approach to the RPGsp approach (apples
to apples).  Every language/program has a purpose and JSPs probably have
their advantages, but it'd be interesting to see how they match up from a
performance standpoint.

I think the typical test to try would be to create a page that displays
records from an iSeries database file.  We have here a database of 70,463
Zip Codes (includes Zip, City, State, County).  I was able to display the
entire database with an RPGsp page in 17.6 seconds.  I simply put a
timestamp at the top and bottom of my page, so it only measures the
processing time on the server, not how long it takes to transfer the records
to the browser (which is a long time - but not relevant).  For reference,
1,500 zip code records load up in 0.25 seconds.  15,000 records load up in
2-3 seconds.  I display every field in the file.  Any chance we could get a
similarly written JSP/RPG-backend sample written to compare speeds?  The
machine I use is a low-end 520 (500 cpw). 

I can send you the source of my page if you'd like.  Here is how the
database is defined:

     A                                      UNIQUE
     A          R POSTR
     A            POSTCITY      28A         TEXT('City')
     A            POSTSTATE      2A         TEXT('State')
     A            POSTZIP        5S 0       TEXT('ZIP Code')
     A            POSTNAME      25A         TEXT('County Name')
     A          K POSTZIP
     A          K POSTSTATE
     A          K POSTCITY

Seth Newton
snewton@xxxxxxxxxxxxxxxxx
Profound Logic Software, Inc.
Toll-Free: (877) 224-7768 x115
Fax: (603) 849-7757

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