“go build” became very slow after installing a new version of Go

Question

After upgrading from Go 1.2.1 to 1.3 (Windows 7 64 bit) \"go build\" execution time has increased from around 4 to over 45 seconds. There were no other changes except the go ver

Answer 1

You probably have dependencies that are being recompiled each time. Try go install -a mypackage to rebuild all dependencies.

Removing $GOPATH/pkg also helps to ensure you don't have old object files around.

Building with the -x flag will show you if the toolchain is finding incompatible versions.