[LLVMdev] benchmarking LLVM

["?=Valery A.Khamenya=?koi8-r?Q?"]

Hi all 
 
  i took a look into LLVM benchmarks from nightly tester and 
  ran Shootout tests on my own. Below go just few outlines. 
 
1. results on my AMD AthlonXP and Xeon used by LLVM  
team are different sometime. In particular, both Shootout  
and Shootout-C++ show great speed up with LLVM (in 
comparison to GCC) on ackerman test on my AthlonXP.  
But here: 
  http://llvm.cs.uiuc.edu/testresults/X86/ 
GCC is reported to be quicker on  
Benchmarks/Shootout-C++/ackermann test. 
 
2. the tests based (e.g. ackerman,fibonacci) on function  
calls are tend to be quicker with LLVM then with GCC  
:) 
 
3. some generic tests (like nested loops) are slower with LLVM 
then GCC. Could anyone check why  
Benchmarks/Shootout*/nestedloop is so slow with LLVM? 
Nested loops is a quite generic construction, so if this  
test will be boosted then it might influence very much  
other test too. 
 
--- 
Valery A.Khamenya