uname -a
Darwin gMac.lan 22.3.0 Darwin Kernel Version 22.3.0: Mon Jan 30 20:42:11 PST 2023; root:xnu-8792.81.3~2/RELEASE_X86_64 x86_64

./m 
src 3  dst 4
00001000 skip
total bytes copied 1a45640 / 1a46640 1a46640  100535 us

/gfc cc1-mmap 
16d835378ab973a114082a585cc76958bdbccec0  cc1-mmap

./d
src 3  dst 4
c a46640  p 1a46640  h 1a46640  d 1000000
total bytes copied a46640 / 1a46640  7117 us

./gfc cc1-sparse 
75e6f6cb303cb5d3909c6d7830c417fc6ed658c3  cc1-sparse

./n 
dst 3  MS_ASYNC 1  MS_INVALIDATE 2  MS_SYNC 16
size bytes 1a46640  msync ok  43770 us

./d 
src 3  dst 4
c 1000  p 1000  h 1000  d 0
c 1a44640  p 1a46640  h 1a46640  d 2000
total bytes copied 1a45640 / 1a46640  41322 us

./gfc cc1-sparse 
16d835378ab973a114082a585cc76958bdbccec0  cc1-sparse

./m 
src 3  dst 4
00001000 skip
total bytes copied 1a45640 / 1a46640 1a46640  59198 us

./d 
src 3  dst 4
c a46640  p 1a46640  h 1a46640  d 1000000
total bytes copied a46640 / 1a46640  12144 us

./gfc cc1-sparse 
75e6f6cb303cb5d3909c6d7830c417fc6ed658c3  cc1-sparse

./n 
dst 3  MS_ASYNC 1  MS_INVALIDATE 2  MS_SYNC 16
size bytes 1a46640  msync ok  27462 us

./d 
src 3  dst 4
c 1000  p 1000  h 1000  d 0
c 1a44640  p 1a46640  h 1a46640  d 2000
total bytes copied 1a45640 / 1a46640  32125 us

./gfc cc1-sparse 
16d835378ab973a114082a585cc76958bdbccec0  cc1-sparse