> False sharing occurs when multiple cores update different variables in the sam... | Hacker News

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		hu3 5 months ago \| parent \| context \| favorite \| on: CPU cache-friendly data structures in Go > False sharing occurs when multiple cores update different variables in the same cache line. I got hit by this. In a trading algorithm backtest, I shared a struct pointer between threads that changed different members of the same struct. Once I split this struct in 2, one per core, I got almost 10x speedup.

spockz 5 months ago [–]

Interesting! Did you find out a way to bench this with the built in benchmarking suite?

hu3 5 months ago | [–]

No it was just a hunch derived from ancient times of SoA vs AoS game dev optimization. I didn't need the perf gain but tried and it worked.

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