Why make manifests is so slow?

[Peefy]

Hello.

I want to know why 'make manifests' is so slow. I haven't modified any jsonnet or libsonnet files. The following is my execution time:

> time jsonnet -J vendor example.jsonnet
jsonnet -J vendor example.jsonnet  249.29s user 1.21s system 98% cpu 4:15.09 total

[cateto]

https://github.com/prometheus-operator/kube-prometheus/blob/main/build.sh

./build example.jsonnet

I use this script above and It works fast for me

RESULT

$ time ./build.sh example.jsonnet
./build.sh example.jsonnet  2.94s user 0.15s system 97% cpu 3.183 total

[DimaVIII]

I was also shocked that compiling this few files takes horribly long.
There are two jsonnet programs and I installed the wrong one~! go-jsonnet and jsonnet; The Go version is the right one.

Solution: go install github.com/google/go-jsonnet/cmd/jsonnet@latest
Info: https://github.com/google/go-jsonnet

The normal jsonnet is a terrible program, but google made a new pure go version of it, go-jsonnet.
It's x1000 faster and it's a drop-in replacement. Remove jsonnet, install go-jsonnet.
./build.sh kube.jsonnet 9.10s user 2.86s system 179% cpu 6.673 total

Want to go faster? Try out sJsonnet: https://www.databricks.com/blog/2018/10/12/writing-a-faster-jsonnet-compiler.html