Optimization flags to compile C++ code

[usptact]

Original CRFSuite has optimization flags to use SSE/SSE2 intrinsics to speed up numerical computation. Is this enabled in "python-crfsuite"? Does it make sense to build this package locally and install it instead of pulling the package using pip?

There is significant performance difference if you enable vs disable optimizations. See CRFSuite "./configure --help" output for the option.