Optimizing performance with loop unrolling

[toml_12953]

(05-04-2021 02:08 PM)Dave Britten Wrote:  A few months ago, I bought a Surveying Pac for my 97. (Because I'm a sucker - I don't know anything about surveying that isn't in the HP 25 Applications Programs book!) One of the included cards was hand-labeled in pencil: "WEIGHTED AVE GRAVE - Will take 43 sets (ft)(oz) no more".

Yesterday I got my printer working, so I was curious to print out the listing from this card and see what was on it. It has some rather interesting loop-unrolling techniques. But I bet with some effort, I could optimize the program, and shorten it by at least a dozen steps.

Program Listing

Doesn't unrolling a loop take more steps?