DATA-ORIENTED DESIGN The hardware will thank you.
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... shall be the whole law
Michael Bosley posted to his blog, the importance of appreciating the data, not what, how big, or what values this time, but when. The time of arrival of the data, specific values of data, was causing an AVL tree to fall into one of it's worst case scenarios. Algorithmic complexity may have big O notation for quick ballpark estimations of which one to apply to a given situation, but you need to understand why and what causes the best and worst cases before you can assume you can know what is the best algorithm for your particular case.