welcome to the forum!
That’s indeed annoying. Thanks for the bug report!
I just added a timeout: It should stop searching for auto-completion entries after 250 milliseconds. Furthermore, I increased the minimum word length to 2.
Would you please test it again?
Who wants to test the new-new version, just download imagej-legacy.jar and put it in the
jars directory of your Fiji installation. Please remove the other image-legacy.jar in the same folder. Restart Fiji afterwards.
Thanks a lot!