Hi Don,

Good to know. Thank you.

It seems to me that smart (whatever it's called) interpolation of an ordered set could be faster than sequencing once the count reaches some massive number.. By "smart" I'm referring to a modified conventional mathematical interpolation, where the next best guess uses the last two data points to suggest an intersecting line and intersection point to jump to --providing the next best guess.

Assuming 69 million rows, ordered, non-linear values, one could probably cut to search range with a very small count within just a few steps.. Would be fun to play with.

Anyway, I've successfully used a technique like this to reduce the interpolation loops of some business math functions to something reasonable for dynamic web pages.. About 12 iterations on projects with millions of values, non-linear. I'd be glad to share, if you know someone that want to pursue this.

cheers,