Build Cache

Because ko just runs go build in your normal development environment, it automatically reuses your go build cache from previous builds, making iterative development faster.

ko also avoids pushing blobs to the remote image registry if they're already present, making pushes faster.

You can make ko even faster by setting the KOCACHE environment variable. This tells ko to store a local mapping between the go build inputs to the image layer that they produce, so go build can be skipped entirely if the layer is already present in the image registry.