kubens select and switch take too long

[aduong]

When using kubens $ns and kubens -, it's taking over ten seconds. This is caused by the relisting of namespaces, of which I have at least thousands. It'd be nice if this could be sped up, either by allowing me to disable the existence check or caching the namespaces.

[ahmetb]

Oh man you might be the only person with thousands of namespaces. This sounds a lot like #83 which is reinforcing the point that we should probably implement.

[aduong]

#83 is similar, but I do have permissions to list namespaces and I appreciate autocomplete, interactive listing & choosing (via fzf) every so often. Here are some concrete cases where I don't need the namespace check:

• Using a kubens X from my shell history. The check has already been done in the past and generally namespaces don't get deleted.
• Using kubens -

I think one possible tweak is to replace the list check with a get check, i.e. instead of grep -q ^"${1}"\$ <(get_namespaces), do a $KUBECTL get namespace "${1}" and interpret the result/status of that.

[ahmetb]

Yeah, that makes perfect sense. It's likely we’ll fix this in the Go implementation. So I recommend you fork the bash implementation and use yourself in the meanwhile. Thanks for bringing it up.