Hello CalebH,

I’m glad seek was helpful! As to the rest: when I said “more expensive” I was thinking of CPU usage only, not memory usage. Sorry I wasn’t clearer. If memory is tight, it’s obviously more economical of memory to read the file progressively than to keep it all in memory at one time. And if that means reading the same file more than once, that may just be the price you have to pay to keep memory usage within acceptable bounds. But it seems your new version avoids that problem anyway.

Cheers,