Not all your code deserves a clever lock
Most concurrency bugs come from optimizing code that never needed to be fast in the first place.
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I benchmarked two ways to handle concurrency. One was 13x faster.
Channels feel cleaner. Mutexes are faster for reads.
Don't share memory to communicate. Communicate to share memory.
Go has a different answer to concurrency than most languages.
I crashed my server on purpose to understand why
What happens when two goroutines write to the same map at the same time.