Re: [Vala] Vala vs Mono performance benchmark project

[pancake <pancake youterm com>]

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?

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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