I idly wonder how these compare to the arbitrary-precision implementations I worked on for REDUCE, exactly 30 years ago as it happens (https://github.com/reduce

I idly wonder how these compare to the arbitrary-precision implementations I worked on for REDUCE, exactly 30 years ago as it happens (https://github.com/reduce-algebra/reduce-algebra/blob/master/packages/specfn/sfbes.red https://github.com/reduce-algebra/reduce-algebra/blob/master...) - in its unusual Lisp-based but largely procedural language. The citations in the Julia source file are certainly newer - Abramowitz and Stegun was basically all I had. I think the REDUCE functions were considered quite fast (for higher precision) at the time, but it was certainly true that they weren't tested as thoroughly as would be the norm now.