Invert two condition checks to evaluate them in cheapest-to-more-expensive order

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177810 91177308-0d34-0410-b5e6-96231b3b80d8
Added a python version of the performance tests. It will be good to see if the overhead of python interferes at all with our performance readings. We can try things out with this script and see how things go.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177811 91177308-0d34-0410-b5e6-96231b3b80d8
And then again only compute the more expensive piece of data if need be :-)

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@177812 91177308-0d34-0410-b5e6-96231b3b80d8