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Add first draft of instrumented interpreter #713

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In this PR I develop a tracing interpreter for Core. This will allow us to:

  • check whether optimizations actually optimize things
  • measure different aspects of the evaluation as part of CI and make sure that changes do not invalidate optimizations
  • implement a debugger / visualizer in the long run


// doesn't work: product_early (since it SO due to run run run)

val Some(main, mod, decl) = runFile("examples/benchmarks/effect_handlers_bench/triples.effekt"): @unchecked
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You can already experiment with it by changing the filename here and then running testOnly effekt.core.InterpreterTests

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For example, here is the result of running triples:

Static dispatches: 232
Dynamic dispatches: 231
Branches: 701
Pattern matches: 5
Frames (pushed: 405, popped: 530)
Allocations: 5
Closures: 112
Field lookups: 0
Variable reads: 0
Variable writes: 0
Installed delimiters: 1
Captured continuations: 347
Resumed continuations: 350

//println(Interpreter.show(stack))
}
}
Interpreter(data).run(main, inlined)
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By changing this to

Suggested change
Interpreter(data).run(main, inlined)
Interpreter(data).run(main, gced)

you can compare the numbers to those without inlining.

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