[Mono-list] Mono with llvm and profiler

[Rodrigo Kumpera]

I believe you're not measuring it correctly. A trivial String::GetHashCode
benchmark[1] shows llvm been 22% faster. This is with a recent mono.


[1]https://gist.github.com/kumpera/7947579


On Fri, Dec 13, 2013 at 11:52 AM, Rodrigo Kumpera <kumpera at gmail.com> wrote:

> Can you file a bug on profiling with llvm enabled? It's supposed to work.
>
>
> On Wed, Dec 11, 2013 at 8:47 AM, xplicit <svg at ngs.ru> wrote:
>
>> Is there a way to run mono profiler when mono compiled with llvm support?
>> When I run
>> mono --profile=log
>> mono says that it can't find mono-profiler-log in libraries (because there
>> is no libmono-profiler-log.* in /usr/lib) nor in executable. If I compile
>> mono without llvm support profiler starts as expected. My platform is
>> linux
>> 32 bit, mono from master branch.
>>
>> Also where can I look into code samples, which definitely execute faster
>> on
>> mono with --llvm option? I tried two tests - web server (runs 30% slower
>> with llvm), String.GetHashCode() and String.GetCaseInsensitiveHashCode() -
>> same speed with llvm and without llvm. Would like to know what types of
>> code
>> I can use with llvm to increase performance.
>>
>
> Are you comparing wallclock time of the whole execution or only after
> warmup? LLVM is
> an order of magnitude slower at compiling code than the default JIT, so
> you must
> account for that.
>
>
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