Port already in use but nothing in netstat

It was a bug I faced something like year ago, and I didn’t fixed that in the past. This time issue was exactly the same (though app was different). The problem ok let’s check whether anything is blocking the port. Let’s call netstat in cmd with admin rights: there is no service using that port… […]

Observables and duplicated request

Problem: Some time ago I was investigating the case where data shown in one dropdown loaded almost 5 seconds. It took unacceptably long time giving that dropdown contained (no to so long) list of names. Where to start? First check – network tab. When modal was opened 4 requests was sent, 2 OPTIONS and 2 […]

Scroll to top