Jon,
I just posted that so you'd know where I got my information. Phillip
*has* actually decompiled the JIT code and seen that for complex
examples that CFScript is faster, because it's closer in resemblance to
the byte code that ColdFusion ultimately parses. Phillip just stated
better than I could have.
I don't know why folks don't talk about this more. Maybe because it's a
no-brain-er and I'm the only dolt who didn't realize that cfscript tags
could be used inside of cffunction tags, and that it's faster to boot
(in complex cases, of course).
Well, I've got my little function running now, and it works like a
champ. Would it have worked if I re-wrote the thing using tags, sure.
But I'd already written it and donated the code to CFLib.org, so why not
just use what's already been written? :o)
Cheers,
Chris
Jon Gunnip wrote:
> Chris,
>
> I have not done any benchmarks on cfscript vs. tags, but if there were
> significant performance differences, I would expect to have heard of
> these differences by now. Phillip's argument is that there is a
> difference in compiled code, but I did not see any reason to conclude
> that there is an observable difference in performance.
>
> The popuplar O-O frameworks in CF, like Mach-II and Model-Glue, use
> tags in the framework code that I have looked at, and those frameworks
> have had significant time put into them in peformance tuning.
>
> Jon
>
>
>
> On 12/17/06, Christopher Jordan <[EMAIL PROTECTED]> wrote:
>
>> Jon,
>>
>> Here's a snippet of a discussion my local CFUG just had on this subject
>> (in reverse order so you can read it top down):
>>
>> On 11/28/06, Eric Knipp <[EMAIL PROTECTED]> wrote:
>> > It was my understanding that
>> >
>> > <cfscript>
>> > if (a eq b) { a = c; }
>> > </cfscript>
>> >
>> > is the same performance-wise as
>> >
>> > <cfif (a eq b)>
>> > <cfset a = c />
>> > </cfif>
>> >
>> > as the CF compiler turns them into the same thing .. I am pretty sure
>> there
>> > have been other discussions on this topic. As of CFMX I thought
>> there was
>> > no performance difference?
>> >
>>
>> On 11/28/06, Phillip Holmes <[EMAIL PROTECTED]> wrote:
>> > Nope. Your example may be immeasurable, but with more advanced
>> > functionality, that is not the case.
>> >
>> > Obviously, ColdFusion is middle ware for your middle ware. It is a
>> > collection of servlets that consolidate Java functionality into one
>> > tidy command. Calling a tag when you can script it out with one
>> > cfscript block, simply creates another import and more code in the
>> > final JIT. If you write the code in cfscript, it is closer to the end
>> > result (Java) than if CF has to import more servlet libraries to get
>> > to the final result.
>> >
>> > Get yourself a java decompiler, write the code both ways in two
>> > different files, decompile the JIT, and you'll see what I mean. Most
>> > of all, turn your debug times on and look at the difference.
>> >
>> > --Phillip Holmes
>>
>> I think it's actually a pretty common practice.
>>
>> Cheers,
>> Chris
>>
>> Jon Gunnip wrote:
>>
>>> Chris,
>>>
>>> I would be wary of using cfscript just for supposed performance gains
>>> over tags. My understanding is that those gains were eliminated (or
>>> reduced to the point of insignificance) in CF 6.x and 7.x. Here are
>>> what I see as the pros and cons of cfscript. These points are largely
>>> a matter of preference:
>>>
>>> Pros of cfscript
>>> -- more readable
>>> -- less typing
>>> -- more like other languages (Java, JavaScript) - sometimes can copy
>>> Java snippets and they function with little modification in cfscript
>>>
>>> Cons
>>> -- many pieces of cf functionality do not exist in cfscript (e.g.
>>> throw, dump, abort) or are awkward (looping over queries) - we have a
>>> CFScript.cfm include with functions like Throw(), Dump(), Abort() to
>>> get around this, but for cfquery we always use tags
>>> -- might be inconsistent with other code written in tags; I like to
>>> see consistency throughout an application
>>>
>>> Jon
>>>
>>>
>>>
>>>
>>>> I was told by some members of my local CFUG that
>>>> writing code within CFScript tags whenever possible is faster (performance
>>>> wise), so I'm giving it a go.
>>>>
>>>>
>>>
>>
>
>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|
Create robust enterprise, web RIAs.
Upgrade & integrate Adobe Coldfusion MX7 with Flex 2
http://ad.doubleclick.net/clk;56760587;14748456;a?http://www.adobe.com/products/coldfusion/flex2/?sdid=LVNU
Archive:
http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:264372
Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm
Unsubscribe:
http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
