I've seen the same thing in the Java world, I presume for the same reasons as in Go: calling native code in Java is painful, and traditionally Java always had an emphasis on "write once, run everywhere". So the Java community tends to reimplement C code in Java, even when limitations of the language make the code slower and/or more complex (see the classic post "Re: Why Git is so fast" aka "Why is C faster than Java" at https://marc.info/?l=git&m=124111702609723&w=2 or https://public-inbox.org/git/20090430184319.GP23604@spearce.... which mentions things like the lack of unsigned types or value types).
