Yep, I had a vague notion that I was doing too much work, but I was headed out the door so I wrote the naive/better than the original solution, benchmarked it q

Yep, I had a vague notion that I was doing too much work, but I was headed out the door so I wrote the naive/better than the original solution, benchmarked it quickly, and posted it before leaving. Yours also has the advantage of being scalable to ranges other than 1-100,000 without having to write more loop code.