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user 46318
Use when many competing answers are expected in order to find the solution that performs better.
6
votes
How to efficiently select elements with the minimum value from a large list?
Your solution is not bad, but the problem with your solution is that Min[longList[[All, 3]]] is evaluated repeatedly for every element in longList. Calculate the minimum once:
longList = {{1, 1, 12}, …
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