Re: [Vala] Vala vs Mono performance benchmark project

[pancake <pancake youterm com>]

Wow! Thats good news! Will test it tomorrow :)

Another optimization that can bring a 1% extra can be to define ref and unref in .h as static inline 
functions. But thats something the compiler must optimize.

On 31/01/2011, at 20:23, Aleksander Wabik <alex wabik gmail com> wrote:

> Hi,
>
> > on signals i can say that vala uses to call signals by name. vala should generate g_signal_emit() instead 
> > of g_signal_emit_by_name(). can you do a benchmark with this and tell us the performance boost?
>
> I added new benchmark by manually hacking generated C code. The
> performance gain is significant, about 18%.
>
> call_signal_typed:  10,473 <----- this it in vala-generated signal
> invoking benchmark
>
> call_signal_by_reference_typed:  8,544 <---- this is in the hacked code
>
> I've committed the patch that should be applied to the generated C
> code, and the instructions what to checkout, how to generate C code,
> how to apply a patch, and how to build benchmark application from the
> patched C code. The patch itself is very hackish, but does the job.
>
> The commit containing this patch was tagged with name:
> 'check_g_signal_emit_vs_g_signal_emit_by_name_performance.patch'
>
> It can also be reviewed here:
> http://gitorious.org/vala-object-benchmarks/vala-object-benchmarks/commit/e90927e4cb1d65ce692d295817d25cafc789c85f
>
> best regards,
>
> > probably in type checking vala can do a better job at compile time.. but i should look some more code to 
> > talk..
> >
> > the ref/unref performance penalty can only be fixed with a garbage collector, or just delegating all these 
> > tasks to a separated thread, or use slices to alloc/free.. but this is more or less what a decent gc does.
> >
> > --pancake
> >
> > On Jan 30, 2011, at 7:55 PM, Aleksander Wabik <alex wabik gmail com> wrote:
> >
> > > Hi All,
> > >
> > > I've prepared a little benchmark measuring Vala object system
> > > performance ( http://gitorious.org/vala-object-benchmarks )
> > >
> > > - object creation and destruction
> > > - method, virtual method, interface method, signal, delegate, delegate
> > > from a closure calling times
> > > - type checking
> > > - threading locks
> > >
> > > This benchmark is not intended to measure general performance (we have
> > > vala benchmarks in http://code.google.com/p/vala-benchmarks/ for this),
> > > but just to measure object system performance. From what I've seen:
> > >
> > > - type checking 2 times slower than in Mono
> > > - threading (locks) in vala beats mono easily - 19 seconds vs 50
> > > seconds!!
> > > - object creation/destruction suck
> > > - setting/reading property or field beat Mono easily, but I think it's
> > > the matter of compiler optimization; but in classes inheriting from
> > > GObject setters are very expensive (due to issuing a signal)
> > > - calling methods, virtual methods, delegates, lambdas - vala beats
> > > mono, but slightly
> > > - interface methods, signals - we really suck, and there's no excuse
> > > for this. I guess that it can't be fixed in glib, but in dova...?
> > > - ref/unref - we really suck
> > > - weak ref/unref - we beat Mono easily, I guess that even if the
> > > pointer assignment was not optimized out by a compiler we'd do this.
> > > Mono is surprisingly bad at this.
> > >
> > > I guess that at least some of the vala performance drawbacks can be
> > > fixed in dova, as it's a total redesignment of the object system,
> > > true?
> > >
> > > If some of you would like to add some benchmarks / fix something in the
> > > existing ones, please do this, and have fun with the code that I made ;)
> > >
> > > best regards,
> > >
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