###########################################################
# building source without docker
$ time (cd ../../ && make debug)
...
real	0m28.465s

###########################################################
# building boost image without using cache
time make build/boost docker_args=--no-cache
...
 => [builder  2/12] RUN apt update && apt install -y       build-essential       bzr pkg-config      63.7s
 => [runner  2/12] RUN apt update && apt install -y       curl       hwloc       jq                  22.0s
...
 => [builder  8/12] RUN make build/.filecoin-install                                                  7.6s 
 => [builder  9/12] COPY go.mod go.sum /go/src/                                                       0.1s 
 => [builder 10/12] RUN go mod download                                                              86.7s 
 => [builder 11/12] COPY . /go/src                                                                    0.5s 
 => [builder 12/12] RUN --mount=type=cache,target=/root/.cache/go-build make debug                   82.9s 
...
real	4m5.430s

###########################################################
# building boost image after modifying any go file 
$ time make build/boost
...
 => CACHED [builder  8/12] RUN make build/.filecoin-install                                           0.0s
 => CACHED [builder  9/12] COPY go.mod go.sum /go/src/                                                0.0s
 => CACHED [builder 10/12] RUN go mod download                                                        0.0s
 => [builder 11/12] COPY . /go/src                                                                    0.5s
 => [builder 12/12] RUN --mount=type=cache,target=/root/.cache/go-build make debug                   26.9s
...
real	0m29.331s