[fpc-devel] just for information

[J. Gareth Moreton]

I'm always up for finding improvements in the built binaries so long as 
the adjustments to the compiler are reasonable.  I don't have Delphi 
10.4 Sydney or anything close to that version unfortunately, so I cannot 
compare the disassembly of each binary produced, but I'll see what I can 
do someday.

Gareth aka. Kit

On 12/07/2020 11:53, Jonas Maebe wrote:
> On 2020-07-12 09:37, Samuel Herzog via fpc-devel wrote:
>
>> The results you can either verify yourself (by downloading sources or 
>> executables)
>> or look at the attached screenshot.
>>
>> "Composite score" ist the average of the 5 different "benchmarks".
>>
>> I am a little irritated about the scores of "sparse matmult" and "LU".
>
> While the results are certainly interesting, keep in mind that SciMark 
> (and LU in particular; I don't know about sparse matmult) is generally 
> not a very good benchmark in terms of being representative for real 
> world programs, especially as far as non-JIT compilers are concerned. 
> See e.g. 
> https://www.phoronix.com/forums/forum/software/programming-compilers/870805-gcc-6-1-vs-llvm-clang-3-9-compiler-performance?p=871540#post871540 
> (last post on the page) by Honza Hubička, a gcc compiler developer (*).
>
> Of course, compiler developers still tend to focus on it because it is 
> used a lot to compare compiler performance and nobody likes to look 
> bad. And there are of course still optimisations that will improve 
> both those benchmarks and real world programs.
>
>
> Jonas
>
> (*) who has a very interesting blog on compiler optimisations, btw: 
> http://hubicka.blogspot.com
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