Hands-On High Performance with Go

Caching and vendoring improvements

In order to see the improvements we can make with built and cached assets, let's build a project with a third-party dependency. Prometheus [https://prometheus.io/] is a popular time-series database (also written in Go) that is commonly used for metrics gathering and collection. We may want to start up a Prometheus metrics server in any of our applications in order to learn more about our current running binary, from a systems perspective. To do this, we can import the Prometheus library as follows:

package mainimport (    "net/http"    "github.com/prometheus/client_golang/prometheus/promhttp")func main() {    http.Handle("/promMetrics", promhttp.Handler())    http.ListenAndServe(":1234", nil)}

After we instantiate our ...