Your Code as a Crime Scene

Study the Distribution of Hotspots

Take another look at the the first hotspot picture. The cluster we see in the lower-right corner is something that frequently happens in software projects. The reason we see that cluster is because changes to one hotspot are intimately tied to changes in other areas.

Multiple hotspots that change together are signs of unstable code. In a well-designed system, we expect code to become more stable over time. Let’s consider the underlying design principles to see why.

Individual Coding Styles Affect Hotspots
	A project’s success depends on the coding skills of the people involved. As humans we vary a lot in our ...