I realize this isn't what you're asking for, but I believe you have access to unix netstat on windows through cygwin. I don't know if this would run any faster for you or not, but it's an option.

Moving from Windows to Linux? Here are the networking commands to use instead—plus a WSL bonus.

In today's interconnected digital landscape, monitoring network activity is paramount for ensuring the security and efficiency of computer systems. Whether you're a system administrator, network ...

Maintaining command-line finesse is an important objective for Windows Server administrators. Rick Vanover offers some pointers on using the netstat command. Netstat is a command that some Windows ...

Linux systems provide a lot of useful commands for reviewing network configuration and connections. Here's a look at a few, including ifquery, ifup, ifdown and ifconfig. There are a lot of commands ...

This article examines netstat and some of it many outputs, in relation to the open systems interconnect (OSI) model. A quick examination of netstat's man pages provides a description of the program: ...