Mon, 02 Mar 2009 07:12:41 -0500, Mason Green wrote:
> Excellent, I've implemented your optimizations and left a more
> detailed comment on the blog. I've also made a number of
> optimizations to the physics engine over the weekend, and the
> performance increase is phenomenal!
>
> http://svn.ds
Excellent, I've implemented your optimizations and left a more detailed comment
on the blog. I've also made a number of optimizations to the physics engine
over the weekend, and the performance increase is phenomenal!
http://svn.dsource.org/projects/blaze/downloads/blazeDemos.zip
Much apprecia
Thu, 26 Feb 2009 19:42:20 +0300, Sergey Gromov wrote:
> Tue, 24 Feb 2009 14:08:26 -0500, Mason Green wrote:
>
>>> Have you profiled your D code? What has the profiling told you? Have you
>>> seen where you allocate memory, to move such allocations away from inner
>>> loops, or just reduce their
Walter Bright Wrote:
> Sergey Gromov wrote:
[...]
> > Heh, thanks! I hope my opus really worths mentioning.
>
> I think it is.
Shouldn't things like these maybe be included under the "Tech Tips" on
digitalmars.com or so?
Ciao
TomD
Sergey Gromov wrote:
Thu, 26 Feb 2009 14:43:11 -0800, Walter Bright wrote:
Sergey Gromov wrote:
http://snakecoder.wordpress.com/2009/02/26/profiling-with-dmd-on-windows/
I already have some material for the second one, profiling Blaze. ;-)
http://www.reddit.com/r/d_language/comments/80lpm/p
Thu, 26 Feb 2009 14:43:11 -0800, Walter Bright wrote:
> Sergey Gromov wrote:
>> http://snakecoder.wordpress.com/2009/02/26/profiling-with-dmd-on-windows/
>>
>> I already have some material for the second one, profiling Blaze. ;-)
>
> http://www.reddit.com/r/d_language/comments/80lpm/profiling_w
Sergey Gromov wrote:
http://snakecoder.wordpress.com/2009/02/26/profiling-with-dmd-on-windows/
I already have some material for the second one, profiling Blaze. ;-)
http://www.reddit.com/r/d_language/comments/80lpm/profiling_with_digital_mars_d_compiler_on_windows/
Tue, 24 Feb 2009 14:08:26 -0500, Mason Green wrote:
>> Have you profiled your D code? What has the profiling told you? Have you
>> seen where you allocate memory, to move such allocations away from inner
>> loops, or just reduce their number? >
>
> No, I have not profiled the D code other than
Jarrett Billingsley wrote:
True. However defining what the compiler does in these optimizations
is not just in the interest of performance, but also in the interest
of correctness and other implementations.
Optimization should have nothing to do with correctness.
If everyone can see what
DMD
On Wed, Feb 25, 2009 at 8:59 PM, Walter Bright
wrote:
> Jarrett Billingsley wrote:
>>
>> Also, looking at the DMD frontend source is *not* an acceptable option.
>
> I knew you'd say that .
I knew you'd suggest it ;)
> On the other hand, inlining or not is, like register allocation and any
> othe
Jarrett Billingsley wrote:
Also, looking at the DMD frontend source is *not* an acceptable option.
I knew you'd say that .
On the other hand, inlining or not is, like register allocation and any
other optimizations, highly implementation dependent. If you're going to
micro-optimize at that l
Jarrett Billingsley wrote:
In this case it's not entirely helpful that DMD's inlining rules are
completely opaque. Do you have a list of what DMD will and won't
inline, and their justifications? If not, could you make one?
In the immortal words of Oggie-Ben-Doggie, "use the source, Luke".
In
Mason Green:
> I made a few fixes to my demo, and it now appears to run on par with Java. It
> seems I made a very rookie mistake on my main demo loop.
>
> Check out Blaze demo #3:
> http://svn.dsource.org/projects/blaze/downloads/blazeDemos.zip
Why do you use lines with a thickness of 2?
Antial
Mason Green wrote:
> Hi,
>
> I made a few fixes to my demo, and it now appears to run on par with Java. It
> seems I made a very rookie mistake on my main demo loop.
>
> Check out Blaze demo #3:
> http://svn.dsource.org/projects/blaze/downloads/blazeDemos.zip
>
> Cycle through (with arrows) a
Hi,
I made a few fixes to my demo, and it now appears to run on par with Java. It
seems I made a very rookie mistake on my main demo loop.
Check out Blaze demo #3:
http://svn.dsource.org/projects/blaze/downloads/blazeDemos.zip
Cycle through (with arrows) and compare it to the Java pyramid stres
On Wed, Feb 25, 2009 at 9:09 AM, Jarrett Billingsley
wrote:
> On Wed, Feb 25, 2009 at 3:26 AM, Walter Bright
> wrote:
>>
>> Also, if you are trying to optimize the code by trying various tweaks at the
>> statement level, it's much like shooting skeet blindfolded if you don't look
>> at the asm ou
On Wed, Feb 25, 2009 at 3:26 AM, Walter Bright
wrote:
>
> Also, if you are trying to optimize the code by trying various tweaks at the
> statement level, it's much like shooting skeet blindfolded if you don't look
> at the asm output. It's time consuming and unlikely to be successful.
In this cas
Tomas Lindquist Olsen wrote:
perhaps a verbose mode could be added in dmd that prints the pretty
printed declaration when a function is inlined. then it would be a
simple grep to make sure.
dmd -vi foo.d | grep 'foo\.inc'
telling people to inspect the obj2asm output seems to be popular, but
it'
On Wed, Feb 25, 2009 at 8:42 AM, Walter Bright
wrote:
> Mason Green (Zzzzrrr) wrote:
>>
>> When I remove -inline there doesn't seem to
>> be much of a difference in execution speed.
>
> Try running obj2asm to see if the functions you want inlined are actually
> inlined or not.
>
perhaps a verbose
Mason Green (Zzzzrrr) wrote:
When I remove -inline there doesn't seem to
be much of a difference in execution speed.
Try running obj2asm to see if the functions you want inlined are
actually inlined or not.
Both LDC and GDC inline the function. (LDC actually reduces your code to
nothing, so I had to change it a bit to see if the call was really
inlined.)
== Quote from bearophile (bearophileh...@lycos.com)'s article
> dsimcha:
> >I think you're right, strange as it seems. I wonder why ref is never
> >inlined.<
> Do you want something like a forced_inline attribute in D? :-)
> Bye,
> bearophile
No, actually, I like the idea of leaving these small
dsimcha:
>I think you're right, strange as it seems. I wonder why ref is never inlined.<
Do you want something like a forced_inline attribute in D? :-)
Bye,
bearophile
== Quote from Bill Baxter (wbax...@gmail.com)'s article
> I seem to remember from a previous discussion about optimizing a
> ray-tracer that DMD will not inline functions that take reference
> parameters. Can anyone else confirm this?
> --bb
Here's a test program I wrote
I seem to remember from a previous discussion about optimizing a
ray-tracer that DMD will not inline functions that take reference
parameters. Can anyone else confirm this?
--bb
Mason Green wrote:
> bearophile:
>
> Thanks for the reply.
>
>> A JavaVM like HotSpot is more refined than the backend of DMD, its GC is
much more refined and more efficient, it's much better in inlining virtual
methods, its data structures are usually better performance-tuned, etc. The
D la
On Tue, 24 Feb 2009 22:08:26 +0300, Mason Green
wrote:
bearophile:
Thanks for the reply.
A JavaVM like HotSpot is more refined than the backend of DMD, its GC
is much more refined and more efficient, it's much better in inlining
virtual methods, its data structures are usually better
bearophile:
Thanks for the reply.
> A JavaVM like HotSpot is more refined than the backend of DMD, its GC is much
> more refined and more efficient, it's much better in inlining virtual
> methods, its data structures are usually better performance-tuned, etc. The D
> language is newer than Ja
Mason Green:
>I'm looking for ways to optimize Blaze, the D port of Box2D, and running into
>some frustrations. In fact, the same Java port
>(http://www.jbox2d.org/v2demos/) is currently running circles around Blaze,
>performance wise<
In the beginning the Java code used to run very slowl
Hello,
I'm looking for ways to optimize Blaze, the D port of Box2D, and running into
some frustrations. In fact, the same Java port
(http://www.jbox2d.org/v2demos/) is currently running circles around Blaze,
performance wise
I have a sneaking suspicion that this is the result of the many
Hello,
I'm looking for ways to optimize Blaze, the D port of Box2D, and running into
some frustrations. In fact, the same Java port
(http://www.jbox2d.org/v2demos/) is currently running circles around Blaze,
performance wise
I have a sneaking suspicion that this is the result of the many
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