Re: Improve efficiency of 3 big array ops.

Tim Prince wrote:


> In view of the size of your problem, cache behavior is likely to be
> important. You may have to block your loops on iv so that they don't
> overflow L1 cache, if multiple loops are using the same data.

I don't understand the last sentence, having little knowledge of code
optimization. What does it mean to "block a loop"? Thanks.