[LLVMdev] Dynamically loading native code generated from LLVM IR

[Jim Grosbach]

On Oct 12, 2012, at 7:07 AM, Baris Aktemur <baris.aktemur at ozyegin.edu.tr> wrote:

> Dear Tim,
> 
>> 
>> The JIT sounds like it does almost exactly what you want. LLVM's JIT
>> isn't a classical lightweight, dynamic one like you'd see for
>> JavaScript or Java. All it really does is produce a native .o file in
>> memory, take care of the relocations for you and then jump into it (or
>> provide you with a function-pointer). Is there any other reason you
>> want to avoid it?
>> 
> 
> Based on the experiments I ran, JIT version runs significantly slower than the code compiled to native. But according to your explanation, this shouldn't have happened. I wonder why I witnessed the performance difference.
> 

Did you compile the native version with any optimizations enabled?

> Thank you.
> 
> -Baris Aktemur
> 
> 
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