Product Version = NetBeans IDE Dev (Build 201708300001)
Operating System = Windows 7 version 6.1 running on amd64
Java; VM; Vendor = 1.8.0_141
Runtime = Java HotSpot(TM) 64-Bit Server VM 25.141-b15

Reproducibility: Happens every time

a)
STEPS:
  * press "m" after "stream()."  --> this invokes code completion

ACTUAL:
  wait long time  (this is captured by slowness reporter)

EXPECTED:
 show list immideately


b)
STEPS:
  * choose method name (only if not completed automatically

ACTUAL:
  - wait long time  (this is captured by slowness reporter)
  - open alert box "initializing code template"
  - waiting an even longer time for this alert to disapear (this is NOT captured by slowness reporter)

EXPECTED:
 complete code immideately

sometimes it take more than one minute to enter a simple line of code, which might be done without the assistance of an IDE within one second...
This is a showstopper (and even prevents me from further testing of the current build)!

same proble appears on invoking templates manually, e.g. "fore {Tab}"