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The cost of writing data to memory is incredibly small; you'd have to be working on something like gaming engines for it to even be noticeable.

Logging can also be done in a separate thread, reducing even that exceptionally minor cost.

Can confirm -- writing data to memory is incredibly fast. It's faster to use a lock-free queue and use CAS to insert data though:

I've benchmarked code myself, and the flamegraphs will barely show the SpscArrayQueue in the profile.