I haven't done any performance comparisons yet, unfortunately. I'm still working on improving the codebase to make it more Swifty. The backing fields are a left

I haven't done any performance comparisons yet, unfortunately. I'm still working on improving the codebase to make it more Swifty. The backing fields are a leftover from the original Java implementation, and I didn't want to change too much initially, but now I have a bunch of tests and am using it in another project (a PDF generation library), I will start to make these changes :)