Out of curiosity, I just ran the test on my 10.13.6 system:
On HFS+, the tool finishes in about 5 seconds, ending up with a 4 GB file.
However, on a freshly created APFS vol (no encryption, on same SSD as the
HFS+ volume), it runs for about an hour! But no extra wait time around 2 GB.
I guess
UPDATE:
1. Interestingly, ftruncate() works fine on macOS Catalina. Were there some
fixes for this in Catalina?
2. I found an open issue for missing posix_fallocate():
https://openradar.appspot.com/32720223
On Thu, Dec 19, 2019 at 4:32 PM Ilia K wrote:
> Hi!
>
> I investigate performance
