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

# 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)

Intristics

Some functions from stdlib are implemented as intristics

Intristic handling

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