On 29-5-2023 16:24, Sven Barth via fpc-pascal wrote:
FPC itself is single threaded. So for that the single thread rating is
more important. However Lazarus (and fpmake) can parallelize the
building of packages if they don't depend on each other. On the other
hand this is only really important when rebuilding and not when doing
normal builds.
Each core above 4 is increasingly irrelevant.
I bought some machines recently, and did test some build times on
Windows for FPC snapshot (clean,build,install, with as many options as I
know):
i7-3770 desktop 142s
Ryzen 5800H laptop 103s
Ryzen 4800H laptop 118s
Ryzen 5700X desktop 89s
Note that some of the 5700X's speed comes from a nearly twice as fast
clean (15s vs 28-33s)as the other machines. The only reason I can think
of for that is that the machine has a retail SSD (Corsair MP510, decent,
but nothing extreme), the other two Ryzens also have PCIe SSDs, but
factory installed.
I tested some of the 8 core ryzens with settings to 6 cores, and the
difference is a few seconds only.
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