By default, 'go run' runs the compiled binary directly. The binaries are stored in a temp work folder, to see where they are stored use the -work flag. This directory path is stored in the GOCACHE env variable. Use go env to check its value
$ go env GOCACHE
go run --work fizzbuzz.go
[1 2 Fizz]
When you run this go will not delete the temporary build when exiting. The default directory may vary with your system & GOPATH.