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.

As a Windows user, you have likely encountered and used Command Prompt before, perhaps not fully understanding its potential. As an effective command-line interface providing access to system files ...

Navigate Windows quickly by mastering Command Prompt, the essential tool for running commands across various versions You can open Command Prompt using the search bar on the taskbar or Start menu. On ...