[osflash] AS3 optimizations page created

[zwetan]

>
> I was saying accurate for "being sure that a particular trick is consistent",
> reading the wiki you can think that (value*.5) is faster than (value/2)
> (the flaw of the micro-benchmarks) but I think the code I showed earlier
> prove it's not.
>

just a little add up on that

from that link
http://strongtalk.org/benchmarking.html
and the comment here
http://blogs.sun.com/chrisoliver/entry/hotspot_vs_adobe_tamarin_vm
"
CrossPoster: Tamarin JITs all methods that might be called more than once.

So you're seeing JITted performance for benchmarks that put the
critical path code into a function, but: as noted early in this blog,
without a package {} around the function, and type annotations, the
JIT currently de-optimizes significantly. The empty package wrapping
enables early binding, and the type annotations avoid "boxing" of
runtime-type-tagged values in and out of the function. There may be
other effects; perhaps Ed will comment again.

Hence the significant speedup for the "Typed" versions of the tests.
We will make "Untyped" code fast too, for all the "Web JS" out there.

/be
"

2 things
- run tests in package and from within function
- the other one being don't call trace() while calling your tests
  I 've been bite by this flaw the same as some exemple of the wiki

cheers,
zwetan