[fpc-devel] The 15k bounty: Optimizing executable speed for Linux x86 / LLVM

Simon Kissel simon.kissel at nerdherrschaft.com
Sun Nov 18 23:38:12 CET 2018

Hi Florian,

> Compile the benchmark with (where fpcnew is the newly build fpc):

Bero has confirmed, works for us as well. This rocks!

> The changes help also on arm and arm can be build using the same
> command line, however, at least on a Raspi3B+ the
> improvement is less significant than on i386 (still the old cache
> flush (?) issue which is outside of the scope of FPC?).

We'll try that next. And yes, on the bloody Kirkwood CPU which we use
a context switch will result in a CPU cache flush.



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