Optimize coercionKind
Currently, the ForAllCo
case of coercionKind
does an inefficient one-variable substitution. This could be improved by looking for nested ForAllCo
s.
Furthermore, perhaps we don't need an in-scope set and the full substitution machinery here. The subst is simply propagating the update of a tyvar's kind. No structural changes at all. No need for smart coercion constructors or other processing. So if we're going to optimize this, it might be worth making a specialized version of subst_ty
and subst_co
that operate over a VarEnv Var
instead of a full substitution.
Trac metadata
Trac field | Value |
---|---|
Version | 7.10.3 |
Type | Task |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |