Tool for determining performance bottleneck I am using my early 2011 MacBook Pro for iOS development, Photoshop work, and the like, and it is at times quite sluggish. Is there a tool that I can just run for a day, and then look at the statistics it produces to identify the performance bottleneck?

I am considering either buying more RAM (I have 8 currently, would get 16) or an SSD (I currently have the stock HDD).
The tools I would use are:


Activity Monitor
Instruments (run from Xcode)
vm_stat 900 
io_stat 900
top -u -s 900
sysdiagnose - shift+control+option+command+. (or run sudo sysdiagnose)


The two stat commands and top all run in a terminal window and snapshot 15 minute intervals of activity. The stat ones log the statistics. I'd run the sysdiagnose command sparingly, perhaps once at the start of the period, once when the OS seems exceptionally slow and once at the end.

The easiest to manage is Activity monitor and I'd focus on making sure nothing is occupying the CPU that you don't feel should be taking a lot of resources and the balance of RAM - what percentage is wired what percentage is wired+active.