Xcode 4 configure to use less RAM?

I've been trying to use Xcode 4 on my 1GB Mac Mini. It's not a happy situation. It frequently slows way down, presumably due to memory s开发者_高级运维hortages.

Are there any settings I can change so it won't be such a memory hog?

Another post here suggests that the problem may be having the "predictive compilation turned on in the Xcode preferences."

I ended up doing the following. None of them reduced Xcode's memory consumption, but they did reduce the memory needed by other programs, and hence solved my problem -- speed is fine now.

• Start using chrome instead of Firefox
• Turn off spotlight and dashboard
• Don't auto-launch iTunes