>This is work in progress. We will add its sections in pieces. Your feedback is welcome at <a href=https://discuss.istio.io>discuss.istio.io</a>.</div></aside></div><p>Before the advent of microservice architecture, development teams built,
deployed and ran the whole application as one large chunk of software. To test a
small change in their module not merely by unit testing, the developers had to
build the whole application. Therefore the builds took large amount of time.
After the build, the developers de