jrsonnet-evaluator

Interpreter for parsed jsonnet tree

Standard library

jsonnet stdlib is embedded into evaluator, but there is different modes for this:

• codegenerated-stdlib
  • generates source code for reproducing stdlib AST (Example)
  • fastest on interpretation, slowest on compilation (it takes more than 5 minutes to optimize them by llvm)
• serialized-stdlib
  • serializes standard library AST using serde
  • slower than codegenerated-stdlib at runtime, but have no compilation speed penality
• none
  • leaves only stdlib source code in binary, processing them same way as user supplied data
  • slowest (as it involves parsing of standard library source code)

Because of codegenerated-stdlib compilation slowdown, serialized-stdlib is used by default

Benchmark

Can also be run via cargo bench

```markdown

codegenerated-stdlib

test tests::bench_codegen ... bench: 401,696 ns/iter (+/- 38,521)

serialized-stdlib

test tests::bench_serialize ... bench: 1,763,999 ns/iter (+/- 76,211)

none

test tests::bench_parse ... bench: 7,206,164 ns/iter (+/- 1,067,418) ```

Intrinsics

Some functions from stdlib are implemented as intrinsics

Intrinsic handling

If indexed jsonnet object has field 'intrinsic_namespace' of type 'string', then any not found field/method is resolved as Val::Intrinsic(__intrinsic_namespace__, name)