WHy is 'Save Visualization' so slow?

When I save a visualization, it takes about 25 seconds.

What factors determine how long it takes to save?
Is this normal?

It's difficult to say, I'll list a few possibilities below. Would it be possible to capture a HAR or share info on the network request from dev tools?

  • browser -> kibana latency
  • kibana -> elasticsearch latency
  • refresh interval
  • elasticsearch load

I've created a HAR file: https://1drv.ms/u/s!Aoo7pNw3X_ybjPcavzbdRyUBLLNt9g?e=Ii5Cv0