> -----Original Message-----
> From: Nic Wise [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, March 30, 1999 1:09 PM
> To: [EMAIL PROTECTED]
> Subject: Re: JSP vs. ASP
>
>
> Mike McElligott wrote:
> >
> > Hi all. I've seen this thread before, but in the posts
> I've read it never
> > really got answered. My understanding is that ASP is
> compiled via C++ and
> > that JSP is, of course, interpreted. Does anyone have
> numbers on what the
>
> you must be JOKING!!!! (sorry :) )
>
> If you rewrite that as:
>
> >My understanding is that JSP is compiled via Java and
> >that ASP is, of course, interpreted.
>
> you have it about right.
ASP is run though the c++ Compiler, not well, but in is run through it when
the page is first loaded (or submitted to the server....), its then cached
in memory (and I believe saved - as after rebooting the system, you can
still get the OLD asp page if the system hasn't recompiled it) there are a
number of Bugs associated with how the IIS server realises the page has been
updated. (IIS 4 is quite a bit better then 3 in my experience on that
front).
JSP is compiled to byte code and then JITed from there (Can't wait for
Hotspot - it will run *faster* :) ).
the JIT process should let the pages run nearly as fast as a pure compile -
within loops.
that's the theory -
ok, how things seem to be... JSP seems to FLY, like ASP could only dream of.
however non quantifiable observations are not much help. which leads to...
the "for the record" stuff.....
I think that their need to be some tests for ASP vs JSP so
I'm going to build some standard tests for the speed for the systems. the
code is going to be as identical as possible.
I think the tests should include, dictionary thrashing (dropping stuff into
Dictionaries pulling them out etc), general loops (printing foo a couple of
100,000 times to screen) etc. and some long long scripts with no loops. (ASP
may very well be faster at them (the JIT will be working overtime with new
stuff to compile)). ODBC/JDBC connections are also going to be thrashed.
To be fair I've never had a performance problem with ASP. As long as things
are declared, ADO connections are in transactions, and you not spending al
your time pulling stuff out of the session object, ASP should run plenty
fast.
With that in mind however, JSP is the better language (what can I say I like
strong typing - objects, sane data structures, none of the Sub or Function
madness (Do I use brackets to call that method???)). I simply would not care
if JSP ran slower, it is harder to write buggy code, and that for me is
where its at :).
> > actual performance differences are? If ASP is
> significantly faster than JSP
> > it's going to be hard to sell it to the shop I currently
> work for, but if
> > JSP is faster it'll be a terrific excuse to do some fun
> stuff (read Java
> > stuff). I can't imagine how JSP *would* be faster than
> compiled ASP - I'm
> > just hoping I'm wrong. :) Does anyone have numbers?
>
> Nope, no numbers, but here's my take:
>
> (just as a background, I've been using JSP for about 2 months now, and
> before that, ASP for about a year. I dont think I'd EVER go
> back to ASP)
>
> JSP is Java, thru and thru. Its 'compiled' to a bytecode class, and if
> you are running a JIT compiler (as I am), its effectivly native code.
> Its quick as hell, and beats the crap out of ASP in 99.9% of cases.
>
> ASP is 'compiled' in a way, I'd go with 'tokenized' personally. Its
> definatly NOT compiled into C++ - for a start, that would be way too
> slow, as compiling C++ is a dog at best, and a trip to the coffee
> machine at worst. A lot of the objects you use (session, application,
> request etc) are all C++ (I assume) as they are just ActiveX objects.
> You can write them in any activeX-capable language if you want -
> Delphi4, C++Builder4, VB6, VC++, VisualJ++, PowerBuilder???
>
> AFAIK, its put into an intermediate state (higher level than bytecode)
> and interpreted. Hell, its the exact same engine that IE, MS
> Office, etc
> uses, and both of them are a long way from efficient.
> (VBScript, part of
> the active scripting suite - you can build it into your own app if you
> _really_ want)
>
> Speed comparisons: JSP on my laptop (PII 266, 144meg RAM, Borland JIT
> compiler) is maybe 2x the speed of ASP on my old works server
> (PII 350,
> 128meg RAM, IIS4). I dont have a precise metric, but it FEELS a lot
> quicker.
>
> Initial hit: I find them both to be about the same, which is quite a
> credit to JSP, as it actually compiles it!! AFAIK, this is
> using the Sun
> internal Java compiler, which I'm told is NOT quick.
>
> > One other item: some of the team here believes that ASP
> chunks when too
> > much session is used. Does anyone know if JSP suffers from
> the any session
> > problems? Or which implementation is the most scalable?
>
> Just by the fact that JSP will run on platforms other than
> NT, JSP wins
> hands down. NT does not, and WILL NOT scale beyond about 200
> users (quad
> PII/Xeon, 1gig RAM is about the most you can get, and a dual
> UltraSPARC
> should beat this hands down)
>
> I dont know the internals of the sessions, but its the same as the
> servlet sessions, and from what I can get, its just a holder for
> classes. Do a
>
> session.invalidate();
>
> and you release all your session-held objects. V.cool for me
> :) MS says
> not to use the session object for holding objects, as they dont get
> released when the session dies - in JSP they do, as the reference gets
> release, then the JVM garbage collects it....
>
>
> I'd go with JSP, using something like JRun - you can then run
> it on NT,
> Linux, Solarus etc etc, and even change your JSP 'engine' if
> you want (I
> started with JRun, switched to web sphere, then to the sun reference
> implementation, and I intend to move back to JRun for deployment)
>
> Nic.
>
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