Just tried this version, although here I used namida's version that he PMed to me, because for some reason the attachment a few posts above simply kept resulting in a crash every time a pack was selected.
Here are my findings: NL loads much faster (about 5 seconds in contrast to maybe somewhere 20 seconds and upwards with the current NL stable version),
and, unlike with WillLem, selecting a pack the first time does not result in any lag for me at all! Thus, this means every time I close and reopen NL I don't experience any lag whatsoever when selecting packs.edit: No, I misunderstood. I do see the lag that WillLem has experienced, but it's only for about 3 seconds when selecting packs, which I think is what you meant?
edit 2: With some additional testing, it seems that shortly after a level pack has loaded the lag is significant and noticeable if you press F2 or click the level select button shortly after, where the pause is obvious. However, if you wait for about 10 seconds or so before pressing F2 or clicking the level select button, then the pause isn't as noticeable, taking only about 1-2 seconds
Thanks for this, namida!