Imports & Timing?

[mmliam]

I have an application that, as part of it's process, raises an ESP8266 module output pin high; the length of time the pin stays high is process dependent. After the process is completed the module goes essentially into hibernation until awakened by an external signal.

I've noticed that after the initial boot-up on power-up the length of time the pin stays high is about twice as long as when a subsequent external signal becomes active. Given that there are a number of "Imports", is the reason the initial power-up lasts longer is that code is initially being imported, but once imported the code runs quicker for subsequent boot-ups?

Thanks,
MM