remove sub-env and move locals rewrite to a separate pass #222
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The approach of creating child environment comes from the time where CPS has to manually track scope. Nowadays we use the information that is in the AST itself, so this is no longer necessary.
Since we are now storing all locals in a single `Env`, we can move the locals to env rewrite outside of annotate, which saves us a lot of processing time (due to reduced re-iteration of the same ast). Testing with cpstest shows a compile-time reduction from 74.760s to 50.019s (33% improvement).
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Testing with cpstest shows a compile-time reduction from 74.760s to
50.019s (33% improvement).