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The more accurate statement would be is Go implementatation is incapable of accessing optimizations that exist in Java and then Java is incapable of optimizations performed by C# and C++ implementations.

See https://hotforknowledge.com/2024/01/13/1brc-in-dotnet-among-...

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Go is perfectly capable of all of the additional optimizations that are in the fastest Java implementation that is linked in the article.

Until some time ago Go did not even have inlining profitability logic in the compiler and could only inline leaf functions, something which is worse than JVM implementations could do in...2005 or so I think?

Are you sure?

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