Choose instantUpdates or refresh for vault secret operator

Hi experts,
I am using vault secret operator to sync secrets from vault to kubernetes.
I am using enterprise vault.

Currently I only set refresh interval to 60s so at VSO will check for updates every 60s.

So I am wondering should I set instantUpdates to true?

If I enabled instantUpdates , will this increase the Resource Usage(CPU, Momery, .etc) of VSO as well as vault itself significantly?

Asking internally if any performance baselines/tests are available. Unless you are at a unique scale (hundreds of thousands of secrets), I don’t think there would be a major difference, but I have only used instant updates at a very small scale.