So I've began making a couple maps to get familiar with...well, making maps.

I've picked up on a few concepts pretty well (for the most part) and managed to throw together some decent levels
to me, anyways... However, when I did a deathmatch test with full bots, I noticed some serious lag issues from time to time. And I've never had that happen with any of the other levels I've played on (not made by me), so the first thing that popped in my mind was that maybe the map file is too big. Thus, I extracted a map wad from a pk3 to get a good idea of what size a map is, which is around 150 kb. Then I took a look at the size of my map...which was around 1500 kb. So yeah, I learned something today...
I was just wondering if there were any tips or advice for keeping the file size at a decent amount (like a decent limit on weapons, room sizes, etc.) to keep this from being an issue. Any and all ideas are appreciated.