Adobe bashing is quite a trend but in this case I'm pretty sure that it's not Acrobat per se which causing the slowness. Last time when I've seen a similar case

Adobe bashing is quite a trend but in this case I'm pretty sure that it's not Acrobat per se which causing the slowness. Last time when I've seen a similar case some corrupted fonts were the core of the problem, but your hardware setup, OS, filesystem, number of files are also more likely to blame than Adobe.