I just converted a test vB 4.0 forum to XF 1.1. While importing threads/posts, it seems like the import started dragging at some point. For the latter part of that section of the import, the importing was taking about 60-80 seconds to convert about 500 posts (or IOW, about 0.25% progress every 60-80 seconds). For a couple of other functions, such as PMs, I noticed the same slowdowns--the first portion seemed fast, yet it got to a point where imports slowed to a crawl. Total posts number almost 193,000 and total threads is just over 12,000. The entire import for posts/threads was 3 hours, 39 minutes. Since I'm doing this in preparation to move a vB 3.7 big board (7.5 million posts), I'm wondering what the best method would be to import everything. I'd read of a command line interface here--is it that much faster without the overhead of HTTP? Or if I run in GUI mode, is there something I should do on the server beforehand? Would increasing the PHP memory limit for XF help? I don't want to be down for an entire week doing a conversion, IOW...it should go much faster than it was earlier. (BTW, I had done this test import before, and while I don't remember exact numbers, it certainly did not take this long.) I was converting on the same server as the big board, so that would account for some of the delay. However, when we do the conversion, we will be running on the server with no other load on it. I also noticed during the import that our server loads and disk I/O did not change appreciably.