How Can I Effectively Analyze and Manage Go Assembly Output?

Deciphering the Enigma of Go Assembly Output

Inspecting the x86 assembly output generated by the Go compiler can provide valuable insights into your code's efficiency. However, the default -S flag's unwieldy output often obscures this information.

Separating Assembly Output

To resolve the issue of a monolithic assembly output, utilize the -N flag to disable optimizations. This will segregate the assembly code into distinct functions, each bearing a label.

go tool compile -S -N file.go

Exporting Assembly to a File

If you prefer to work with the assembly output in a file rather than the terminal, redirect the output using the ">" syntax.

go tool compile -S file.go > file.s

Alternatively, you can leverage gccgo to generate assembly with various optimization levels.

gccgo -S -O0 -masm=intel test.go

This will produce a file called "test.s," where you can explore the assembly output and fine-tune your code for optimal performance.

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