[fpc-pascal] Compilation speed on Apple M1

[Florian Klämpfl]

Am 21.11.2020 um 12:54 schrieb Tobias Giesen via fpc-pascal:
> Hello,
> 
> first and foremost, many thanks to the creators and contributors of FPC
> and Lazarus, who enabled me to release my product natively for Apple
> Silicon only one day after receiving an M1 Mac. Fantastic work! FPC and
> Lazarus both run natively and work very well.
> 
> According to Geekbench, the single core performance on the new Mac is
> around 1.8x as fast as my Intel Mac. Multicore is also much faster. I
> wonder why I don't see the speed increase in compiling though. Yes I am
> using different FPC and XCode versions, but I wonder what else could
> have an influence? My project is very large and not divided into
> packages, so I frequently need to recompile the whole project.
> 
> I would be most grateful for any performance tips.

In r47526, I implemented support of the prefetch intrinsic on aarch64. On my Raspi4 it reduced make cycle time by 25 % 
(!). I would be very interested to get numbers for the M1.