lvalue functions
regression/sanity tests for suidperl
Full 64 bit support (i.e. "long long")
+ Generalise Errno way of extracting cpp symbols and use that in Errno and Fcntl (ExtUtils::CppSymbol?)
Possible pragmas
debugger
Cache hash value? (Not a win, according to Guido)
Optimize away @_ where possible
"one pass" global destruction
- Optimize sort by { $a <=> $b }
Rewrite regexp parser for better integrated optimization
LRU cache of regexp: foreach $pat (@pats) { foo() if /$pat/ }