What should we do about this "Your custom functions are taking too long to execute" message from the Support team?

What should we do about this "Your custom functions are taking too long to execute" message from the Support team?

Hi Flow team,

We were recently made aware that some of our custom functions took too long to execute in different Zoho Flow organization, see email below.

It seems that there isn't a tool available to pinpoint which specific custom functions are causing issues, and since we manage thousands of them, reviewing each one individually is quite time-consuming. I recommend providing us with a list of the exact custom functions that might stop working on October 15th, so we can make the necessary adjustments on our end.

As of now we are less than a month away from the deadline with no way of knowing which functions are problematic.

Thank you as always for your support!