tfpt review “/shelveset:LexicalScopes2;REDMOND\tomat”
The actual shelveset 
Refactors and simplifies LexicalScope and allocation of local
variables. Previously a LocalVariable instance was created per each
local variable access, which is unnecessary. Since many scopes don’t
define any variables at all we allocate a variable dictionary lazily.
We also used to fallback to dynamic variable lookup in evals in some
cases even though we could lookup statically.
Tomas