“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

Using go1.6,

Simply run go build -i.

It will compile all the dependencies and store them at $GOPATH/pkg/*/* as .a files.

Later when you run go run main.go, everything is much faster.

What s really great is that if you use vendored dependencies (IE: a vendor folder in your project), deps are built appropriately within $GOPATH/pkg/**/yourproject/vendor/**

So you don t have to go get install/get/whatever and have a mix of vendor / global dependencies.

I suspect you got to re-build .a files after deps update (glide update or smthg like this), but i did not test that yet.