jit-lock-stealth-time

jit-lock-stealth-time is a variable defined in `jit-lock.el'.
Its value is

nil

Documentation:
Time in seconds to wait before beginning stealth fontification.
Stealth fontification occurs if there is no input within this time.
If nil, stealth fontification is never performed.

The value of this variable is used when JIT Lock mode is turned on.

You can customize this variable.