Ergonomic, hermetic, user-friendly software build system for Python, Go, Java, Kotlin, Protobuf, Scala, Shell. Pants lets you fearlessly scale up your codebase!

Pants

```- pickle_list: 14.7 us +- 0.2 us -&gt; 9.12 us +- 0.38 us: 1.61x faster
- json_loads: 98.7 us +- 2.3 us -&gt; 62.3 us +- 0.7 us: 1.58x faster
- pickle: 40.4 us +- 0.6 us -&gt; 27.1 us +- 0.5 us: 1.49x faster```

Why has `src/python/pants/engine/subsystem/native_engine_version` changed in my client just from (I presume) building the engine? That file is checked in, so now I have dirty git state and no clue what to do with it.

<@U051221NF> : it should only change if you've actually edited the native code...

<@U066LC126> : did you start on <https://github.com/pantsbuild/pants/issues/4207> ?

...eh, i'll punt a bit longer. but there is work to do here.

also relevant would be converting `TypeConstraints` into just lists of TypeIds (preferably)

i think there are two instances where inheritance comes into play, but.

something like 90% of the externs would probably just reduce to passing across concrete types

...oh. <@U051221NF> : it looks like the last commit that touched that code didn't include the bump to the native engine version: <https://github.com/pantsbuild/pants/commit/b6a936b170e378544b45ba85a04ff5c8054687e3>

which is why master is floating like that =/

i'll probably fix something small today/tomorrow to stabilize that

<@U06A03HV1> how would you feel about removing the Function type in favor of passing around Values? I feel like if we want invoke runnable to take a Value, either we need to have two invokes, one that takes values and one Functions, or we drop the Function type

Another option would be to drop the function type as an id and use an alias on the rust side

BUT. We can convert from value to key on the rust side during construction... so maybe that's the only place where we need the typedef.

<https://github.com/pantsbuild/pants/pull/4256> for the Field to String change

<@U066LC126> : so... i wonder how many places we actually use the `typeid` on Values