On Thu, Jan 13, 2022 at 3:28 AM Alexander Grotewohl via fpc-devel <
fpc-devel@lists.freepascal.org> wrote:

> 32bit on Windows 64-bit uses Wow64.. which has a bit of overhead as an
> emulation layer. I believe it's the same one they use for ARM64 too.
>

It should be kept in mind also that neither 32-bit or 64-bit FPC use GNU LD
for linking on Windows by default, but rather FPC's internal one, and it's
not hard to imagine why that might perform better on 64-bit as well.
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