I'm trying to find a way to make the compilation of a Go program faster. It is currently about 30 seconds, which makes it slow to work with the project.
When I run go build -v, I see that most of the time is spent compiling go-sqlite3 (which links to the C sqlite lib). However, since this lib never changes, I'm wondering if it's possible to prevent the build tool from recompiling this every time?
Try go install -a github.com/mattn/go-sqlite3 which will install the compiled-against-Go-1.3 package into your $GOPATH.
Right now, you likely have an older version installed under $GOPATH/pkg/ and therefore Go is recompiling it for every build.
This is likely due to you upgrading to go 1.3
I had to remove $GOPATH/pkg to get rid of old (incompatible) binaries and then it was able to cache compilation results again
In Go 1.10 no need to run go install etc. Just use go build. The new version uses a build cache to determine which packages need to be re-compiled.
Check out: https://tip.golang.org/doc/go1.10