Use memory arena for types when type checking
#2.250 aberto em 29 de jun. de 2023
Métricas do repositório
- Stars
- (21.417 stars)
- Métricas de merge de PR
- (Mesclagem média 10d 19h) (69 fundiu PRs em 30d)
Description
Currently, we represent types using a nested tree structure in which nodes are reference counted. This is at times awkward to work with, not particularly well-suited to a multithreaded compilation, and potentially slower than using an arena due to the overhead of reference, counting and memory fragmentation. Use an id based memory arena instead.
It is only during type interference and checking that we need to mutate types and to have the various different kinds of type variables, so for all other parts of the compiler, we can have a different, simpler data structure with which to represent types. Related to https://github.com/gleam-lang/gleam/issues/865