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From: karthikbalaguru on 26 Jan 2010 12:22
On Jan 26, 3:51 pm, Josef Moellers <josef.moell...(a)ts.fujitsu.com>
wrote:
> karthikbalaguru wrote:
> > My query is 'A tool that suggests
> > optimized logic for a piece of
> > code/module/function' . I am
>
> Define "optimized"!
>
> Optimized for speed, optimized for memory requirement, optimized to
> handle extreme situations, optimized to handle easy situations?
>

Exactly !
The tool should support
for memory based optimization
that greatly helps in memory/
cost constraint systems,
speed based optimization that
greatly decides the performance
in certain projects, perfect
algorithm/logic required for a
particular scenario, and other
optimization techniques applicable.
It should probably have an option
that could decide the type of
optimization required for the user
for the particular module. May
be there can be an option called
'general optimization' that would
apply all optimization techniques
to a certain level only in a
balanced manner.

If the user is particular about
certain particular optimization,
Once the type of optimization
is got as input from the user,
even the level of optimization can
be got from the user by having
some flags/options for defining
different levels of optimization .

It could also tell the bottlenecks
in the code and that would greatly
help in optimizing the right piece
of code. Maybe a profiler should
also be part of it. The tool can
also display graphs that could
give comparitive analysis of
speed improvement vs memory
usage vs various levels of various
kinds of optimization techniques.

It can also suggest the best
possible number of threads
required, message queues
required for a particular
logic and define that logic.
It can remove off redundant
threads, interrupts or timers
etc and add if required for
an efficient logic that it
could suggest to the user.

Maybe, it can also suggest
various processors and the
relative performance w.r.t
memory, speed and cost
for those .
It could also suggest if
we need to go in for a
multicore and if so , it
can suggest the number
of cores and the kind of
processor !

Karthik Balaguru
From: santosh on 26 Jan 2010 14:33

Nick wrote:
> karthikbalaguru <karthikbalaguru79(a)gmail.com> writes:
>
> > On Jan 26, 3:51 pm, Josef Moellers <josef.moell...(a)ts.fujitsu.com>
> > wrote:
> >> karthikbalaguru wrote:
> >> > My query is 'A tool that suggests
> >> > optimized logic for a piece of
> >> > code/module/function' . I am
> >>
> >> Define "optimized"!
> >>
> >> Optimized for speed, optimized for memory requirement, optimized to
> >> handle extreme situations, optimized to handle easy situations?
> >>
> >
> > Exactly !
> > The tool should support
> > for memory based optimization
>
> Optimised for line width, apparently.

A case of over-optimisation, if there ever was one. ;-)
From: bigbrownbeastie on 27 Jan 2010 03:53
On Jan 15, 12:04 pm, Walter Banks <wal...(a)bytecraft.com> wrote:
> Hans-Bernhard Bröker wrote:
> > David Brown wrote:
>
> > > Nothing stops the compiler from doing this sort of thing in /theory/.
> > > But /practice/ is a different matter.
>
> > The same thing applies to the original question.  If a compiler's
> > full-blown optimizer, given practically infinite time to ponder the
> > problem, can't get that analysis job done, then no other tool can, and
> > certainly not while just looking over the programmers' shoulders as they
> > type.
>
> The compilers optimizer primarily goal is to map an application
> on a target processor. Most good optimizers have a lot of
> information on the application code and the resources required to
> implement a specific instance. A possible implementation might
> involve trying alternative approaches and using compiler metrics
> This could be automated.
>
> Regards,
>
> --
> Walter Banks
> Byte Craft Limitedhttp://www.bytecraft.com

I have not read all this thread becuase it seems a bit long.

Modern compiler optomise for code speed or code size. When you select
these not only are transformations tried and checked but also diffrent
compression algorithms for initialisers. After this the compiler will
select the best methods. Kind of Monte Carlo. Which cannot be done
by hand unless you have too much time on your hands.

Would not be long till you also see 'power use' optomisation or
something along these lines.
From: Walter Banks on 28 Jan 2010 09:03


bigbrownbeastie wrote:

> Modern compiler optomise for code speed or code size.
>
> Would not be long till you also see 'power use' optomisation or
> something along these lines.

The very first high level language that Byte Craft implemented
was specifically designed to optimize for power consumption.

Regards,

Walter..
--
Walter Banks
Byte Craft Limited
http://www.bytecraft.com



From: André Gillibert on 28 Jan 2010 14:29
toby <toby(a)telegraphics.com.au> wrote:
> On Jan 11, 3:07 pm, karthikbalaguru <karthikbalagur...(a)gmail.com>
> wrote:
> > Hi,
> > There are certain editors that highlight
> > the syntax/color for datatypes/variables
> > or comments etc.
> >
> > Similarly,
> > Is there a tool for C language that
> > could suggest an optimized/alternate
> > programming logic for the function that
> > is written ?
>
> IMHO the most effective output it could make is: "Are you really sure
> the best tool for this task is C?"
>

That's called an "optimizer" and is built into any good C compiler...
It doesn't even need to suggest a change. It just does it
internally, without modifying the source code.

PS:
Cross-posting to 5 newsgroup is evil.
Follow-up to comp.lang.c.

--
André Gillibert
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