I filled the bug for profiling.
https://bugzilla.xamarin.com/show_bug.cgi?id=16785
About benchmarking:
I did exactly the same test, but with smaller string (14 chars length). I've
got your snippet and run it. Results are same with --llvm and without. What
am I missing?
//copied your code to test2.cs
dmcs -optimize+ test2.cs
//then run it
$ /usr/bin/mono-sgen ./test2.exe
It took 3259ms
$ /usr/bin/mono-sgen ./test2.exe
It took 3237ms
$ /usr/bin/mono-sgen --llvm ./test2.exe
It took 3236ms
$ /usr/bin/mono-sgen --llvm ./test2.exe
It took 3248ms
Mono Runtime Engine version 3.2.7 (master/01b7a50 Sat Dec 14 01:48:49 NOVT
2013)
Copyright (C) 2002-2013 Novell, Inc, Xamarin Inc and Contributors.
www.mono-project.com
TLS: __thread
SIGSEGV: altstack
Notifications: epoll
Architecture: x86
Disabled: none
Misc: softdebug
LLVM: yes(3.4svn-mono-mono/e656cac)
GC: sgen
OS: Ubuntu linux 32 bit.
llvm configured with these options:
./configure --prefix=/usr --enable-optimized --enable-targets="x86"
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