In my experience you are not wrong. Resolving a build graph can be done efficiently. The main cost is typically the tools invoked to satisfy build targets. Howe

In my experience you are not wrong. Resolving a build graph can be done efficiently. The main cost is typically the tools invoked to satisfy build targets. However, if the build graph does unnecessary work, it can slow the build down by a large amount, e.g. compiling files which were already compiled. In. a large project, it might be the difference between a 10 second build and a 10 minute build for example.