[DotGNU]FWD : Re: Mono.

[Gopal.V]

FYI

If memory serves me right, Miguel de Icaza wrote:
>     If memory serves me right, Bill Lance wrote:
>     > More on the Mono front
>     >
>     http://lists.ximian.com/archives/public/mono-list/2002-March/003726.html
>     Well it compiles, but doesn't produce a working MCS gen2. Also
>     takes more than 15 minutes to compile. (compared to a 3 minute cscc 
>     compile). Imagine compiling the whole .NET system with MCS. Compile
>     farm 
>     time gentlemen.
>     
>       I think that this is Mono crossing a hurdle they set for themselves
>     when they decided to write the compiler in C#.
>     
> It took 15 minutes the first time.
> 
> This was further reduced by changing the implementation of `GetHashCode'
> from returning 0 to return a real hash code, and the compile time
> dropped to 3 minutes, 15 seconds.  
> 
> This is with the interpreter.  There is a bug in the JITer that stops us
> from testing it, and we are looking into the problem, but that should
> cut down the time to the 40 seconds range.  
> 
> One big problem that shows up on the profiles is not the actual
> compiler, but code on the class libraries that has not been optimized. 
> For example, fixing the simplistic StringBuilder.Append implementation
> reduced the compile in another 30% at some point.
> 
> Our profiling shows that most of the time is spend in miss-implemented
> functions in our runtime (when comparing against the Microsoft
> implementation).
> 
> Miguel.

-- 
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