Parallels vs. Boot Camp edit: I snipped this post to comply with a competitor's EULA. Maybe the admins should just delete this thread. -------------------------------------- Hello fellow Parallels users! I regularly use Parallels and Boot Camp<snip> <snip>I decided to run some computation tests. The test platform was my stock MacBook Pro 17" Core 2 Duo 2.33 GHz with 2GB RAM and 160 GB HD. I used two pi calculation programs on Windows XP: QuickPi 4 and PiFast 4.3. I believe they're both multi-cpu aware. While the results of PiFast didn't vary much, QuickPi shows some differences in computation speed. <snip> Boot Camp QuickPi 21.78s PiFast 32.13s Parallels QuickPi 28.07s PiFast 32.97s <snip> These programs only test processor speed. The calculation of pi to 10 million decimal places fits in the memory allocated to the VMs (512 MB). So what do these results say? Boot Camp Run Boot Camp if speed is paramount. <snip> Parallels Parallels is still pretty fast. It works great for me for what I use it for. (It even works great with Microsoft Word's built-in speech recognition, which itself isn't that good.) <snip> What does this not mean? These results do not mean that ... <snip> ... you should ditch virtualization and just use Boot Camp. Virtual machines are a lot more convenient than booting into a different OS via Boot Camp. I didn't test graphics responsiveness, memory speed, hard drive speed or an other factors that affect speed. I invite anyone interested to test for themselves and post the results here!