Xcode 4.3.3和Lion 10.7.4使操作系统停止运行

Question

I have relativity old Macbook Air with 1.6 GHz Intel Core 2 Duo and 2GB 667 MHz DDR2 SDRAM . Recently upgraded to Lion 10.7.4 and Xcode 4.3.3 . Not %100 sure, but empirical evidence seems to demonstrate that when I start using Xcode my OS gets so slow it becomes unusable ie the refresh rate is so bad I can see keyframes of the cursor moving across the screen.

I have done the Disk Utility repair thing to no avail (not that I thought it would help anyway). Any ideas of how to cure this ailment?

---

EDIT

Just was looking at memory upgrade options. Does the below image mean i don't have any?

Answer 1

2 Gb和2核根本不足以运行Lion，而更不用说进行任何合理的密集型开发工作了。