How to reduce compiled file size?

Question

Lets compare c and go: Hello_world.c :

#include
int main(){
    printf(\"Hello world!\");
}

Hello_world.go:

Answer 1

You should get goupx, it will "fix" Golang ELF executables to work with upx. I've already got around 78% file size shrink in some cases ~16MB >> ~3MB.

Compression ratio usually tends to 25%, so it's worth a try:

$ go get github.com/pwaller/goupx
$ go build -o filename
$ goupx filename

>>

2014/12/25 10:10:54 File fixed!

        File size         Ratio      Format      Name
   --------------------   ------   -----------   -----------
  16271132 ->   3647116   22.41%  linux/ElfAMD   filename                            

Packed 1 file.

EXTRA: -s flag (strip) can shrink bin file even more goupx -s filename