FAQ

On Thu, 16 Jun 2016 02:12:56 -0700 (PDT) gordonbgood@gmail.com wrote: [...]
The current beta will work not too badly with amd64 code but still
doesn't use registers efficiently enough to support x86 code as it
uses too many register. optimized C/C++ code only uses six or at
most 7 registers, which the x86 architecture has, but not the nine
registers that the above requires.

So for this tight loop, golang is still slower than optimized C/C++
code, but not by very much if array bounds checks are disabled.
It appears you're well versed in the x86 process instruction set and
code generation. Could you may be offer help to the folks working on
improving the code generation backend of the gc compiler?

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