go compiler coparison: gc go1.20.7 linux/amd64 vs gccgo (Ubuntu 10.5.0-1ubuntu1~20.04) 10.5.0

go-comiler-comparison.txt

NOTE: linux environment is WSL1 on Windows10

ryo@DESKTOP-IOASPN6:/mnt/c/Data/work/go-bench$ uname -a
Linux DESKTOP-IOASPN6 4.4.0-19041-Microsoft #1237-Microsoft Sat Sep 11 14:32:00 PST 2021 x86_64 x86_64 x86_64 GNU/Linux

ryo@DESKTOP-IOASPN6:/mnt/c/Data/work/go-bench$ go version
go version go1.20.7 linux/amd64

ryo@DESKTOP-IOASPN6:/mnt/c/Data/work/go-bench$ gccgo --version
gccgo (Ubuntu 10.5.0-1ubuntu1~20.04) 10.5.0
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

benchmark code: n-body
https://benchmarksgame-team.pages.debian.net/benchmarksgame/program/nbody-go-3.html

// build binary with gc
ryo@DESKTOP-IOASPN6:/mnt/c/Data/work/go-bench$ go build -o nbody.go.gc.out nbody.go

// execute n-body bench
ryo@DESKTOP-IOASPN6:/mnt/c/Data/work/go-bench$ time ./nbody.go.gc.out 50000000
-0.169075164
-0.169059907

real    0m4.338s
user    0m4.328s
sys     0m0.000s

// build binary with gccgo
ryo@DESKTOP-IOASPN6:/mnt/c/Data/work/go-bench$ gccgo -c nbody.go -O5
ryo@DESKTOP-IOASPN6:/mnt/c/Data/work/go-bench$ gccgo -o nbody.go.gccgo.out nbody.o -Wl,-R,/lib/gcc/x86_64-linux-gnu/11 -static

// execute n-body bench
ryo@DESKTOP-IOASPN6:/mnt/c/Data/work/go-bench$ time ./nbody.go.gccgo.out 50000000
-0.169075164
-0.169059907

real    0m5.248s
user    0m5.250s
sys     0m0.000s


the binary gccgo compiled is slower...