gettimeofday() refresh period 15.6 ms (Denis Shirokov)

[J Naman]

Are you running Windows 11 Gawk in Compatibility mode? Check gawk.exe
[Properties][Compatibility].
Some compatibility modes may emulate older versions of Windows timer
functions. Ouch! But native Windows API timing functions will return
(modern) high-resolution times. Sounds close to what you observed. The
oldest compatibility modes are Windows XP SP2 or SP3 and Windows 2000.