If you're used to solving cryptic puzzles, or deciphering texts using crypt-analytical cribs, it can be useful to know the relative frequency of letters in the distribution of words. Wordle has a built-in list of 5-letter words. That list isn't the same as all of the five letter words in the dictionary, or even only the common ones. Perfectly common words like 'tudor' are omitted. This gist contains a few useful tables that are worth familiarizing yourself with if you want to solve wordle puzzles logically.
Arthur Clune ArthurClune
tclementdev
/ libdispatch-efficiency-tips.md
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April 10, 2025 19:06
Making efficient use of the libdispatch (GCD)
The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).
My take-aways are:
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You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.
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Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse
