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CGO Performance In Go 1.21 (shane.ai)

submitted 1 year ago by tedu@azorius.net to c/golang@programming.dev

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Cgo calls take about 40ns, about the same time encoding/json takes to parse a single digit integer. On my 20 core machine Cgo call performance scales with core count up to about 16 cores, after which some known contention issues slow things down.

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[–] sbstp@programming.dev 4 points 1 year ago

That's pretty decent. I'm not convinced about the 16 core limit though, the 12700H has 6 P-cores, 8 E-cores and 6 threads, totalling "20 cores". Not the best chip to benchmark multicore workloads