[Gambas-user] Problems with interpreter optimization and CPU behaviour

[Benoit Minisini]

Le 08/10/2022 à 20:15, Jussi Lahtinen a écrit :
> Could be some limit in the speculative execution. Any correlations to 
> the L1 - L4 cache sizes of your CPU?
> 
> Jussi
> 

My Ryzen 5700G L1 cache size is 64Kb by core, according to this link: 
https://www.techpowerup.com/cpu-specs/ryzen-7-5700g.c2472

The object file of the interpreter loop (gbx_exec_loop.c) has less than 
32Kb of machine code inside according to 'objdump'.

I suspected the gcc compiler to do something weird with the '-O3' 
optimization, i.e. taking some optimization decisions that have huge 
effects as soon as you add three lines of code...

-- 
Benoît Minisini.