Kevin
You're right it is dictionary related! For some reason I had discounted that possibility.
I disabled my user 'dictionaries' and removed the ones I got from Apache, so I think I'm using these from C:\Program Files\Sigil\hunspell_dictionaries
Code:
en_GB.aff 77,920 2015/12/18 16:25:04
en_GB.dic 758,163 2015/12/18 16:25:04
And indeed it's much faster - plenty fast enough for moi.
Is it possible to use another hunspell dictionary, such as one of these ==>>
LibreOffice -Dictionaries. Incidentally they're the same dictionaries I previously obtained from Apache.
And if so how should I do that. Here's the innards of one of them
Added : not only is traversing the word list lickety split, starting Sigil is also much faster (1 second rather than 3-5 seconds).
BR