Beware of drawing conclusions about generational GC from the Golang ISMM keynote. As far as I can tell, they didn’t test against copying generational GC with bump allocation in the nursery, which is the typical implementation.
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Java is even faster than .NET: 6 instructions https://shipilev.net/jvm-anatomy-park/4-tlab-allocation/ …
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I agree bump allocation is fast. I disagree that Go's malloc is "too slow". I believe the people manually adjusting their code to satisfy the escape analysis is the minority engaged in significant performance work.
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