https://nmap.org/nmap-fingerprinting-article-pl.html
Remote OS Detection via TCP/IP Fingerprinting - Polskie
How to glean precious information about a host by querying its TCP/IP stack. Classical methods of OS Detection, stack fingerprinting tools, Fyodor's (nmap)...
os detectiontcp ipremotevia
https://github.com/nmap/nmap/issues/2050
OS Detection CPU Performance Issues · Issue #2050 · nmap/nmap · GitHub
As Nmap's OS detection system has expanded over the years, to the point it now has more than 5,600 fingerprints, some of the algorithms are not scaling as well...
os detectioncpu performance