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I was quite curious to compare Bootcamp vs VMWare as well. Pretty equivalent for this particular task

I decided to do Parallels and Bootcamp (not a requirement for Parallels but you can do it if you want). Only reason I did Bootcamp was to play the occasional windows-only game. For most other things, Parallels or VMWare should do the trick. I'm guessing VMWare on the Mac is like VMWare that I've used previously, where you get a workspace windows. Parallels is like VMWare except you don't get a separate windowed environment, it seems more integrated into OSX. And this is just me playing around with Parallels so I don't know all the features.
 
Solved.

Thank you everyone for taking valuable time and providng your suggestions and thoughts. truly appreciate it. finally switched to imac and installed boot camp and it is working like a charm.
 
Pick the right tool for the job at hand.

You. Nailed. It.

If it's a Windows app, and it supplies your livelihood, don't be a fanboi. Get a Windows machine with the power to do what you need. This doesn't mean you have to surrender your Mac. I have Macs, and I have PCs. Which I use depends on my need. When it comes to your work, it's a tool, not a religion.

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I have a 16GB rMBP, using Bootcamp.

I ran an unscientific test to compare performance:

1. MSAccess Database 1.68GB
2. Grouped/Join Query 1.635M records < 313K records
3. Dell Laptop, 8GB, Dual Core, 2.4GHz
4. MacBook Pro, 16GB, Quad Core, 2.3GHz

Query Results (average over 3 runs, each platform):

1. 19 sec: Dell Laptop
2. 10 sec: Mac via VMWare, pointing to bootcamp (2 vCPUs)
3. 10 sec: Mac via bootcamp directly

I am pretty pleased with this result!

Meaningless- twice as much memory in the Mac and two additional cores. As well, does the Dell also have an SSD of similar performance or are you on a HD?
 
My budget is limited. I spent $1200 on macbook pro and in order to get power pc I would need to spend another $1000. I am still not at that stage where I can spend so much :-(

Bootcamp does have certain driver issues and things. If it's a complex task, it may take some research and/or testing to ensure that everything you need is fully supported. What I don't understand is that you're being hired for this, yet no computer is provided and you're not paid at a level where you can budget for a secondary machine. That sounds like it sucks.
 
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