2 VecArray Implement array using vec()
3 SubstrArray Implement array using substr()
4 VirtualArray Implement array using a file
5 ShiftSplice Defines shift et al in terms of splice method
9 Contiguous bitfields in pack/unpack
11 Bundled perl preprocessor
12 Use posix calls internally where possible
13 gettimeofday (possibly best left for a module?)
15 -i rename file only when successfully changed
16 All ARGV input should act like <>
17 report HANDLE [formats].
18 support in perlmain to rerun debugger
19 regression tests using __DIE__ hook
20 reference to compiled regexp
21 lexically scoped functions: my sub foo { ... }
23 regression/sanity tests for suidperl
24 Full 64 bit support (i.e. "long long"). Things to consider:
25 how to store/retrieve 32+ integers into/from Perl scalars?
26 32+ constants in Perl code? (non-portable!)
27 32+ arguments/return values to/from system calls? (seek et al)
28 32+ bit ops (&|^~, currently explicitly disabled)
29 The _r-problem: for all the {set,get,end}*() system database
30 calls (and a couple more: readdir, *rand*, crypt, *time,
31 tmpnam) there are in many systems the _r versions
32 to be used in re-entrant (=multithreaded) code.
33 Generalise Errno way of extracting cpp symbols and use that in
34 Errno and Fcntl (ExtUtils::CppSymbol?)
38 optimize (use less memory, CPU)
41 constant function cache
44 Set KEEP on constant split
45 Cache eval tree (unless lexical outer scope used (mark in &compiling?))
47 Shrink opcode tables via multiple implementations selected in peep
48 Cache hash value? (Not a win, according to Guido)
49 Optimize away @_ where possible
50 "one pass" global destruction
51 Rewrite regexp parser for better integrated optimization
52 LRU cache of regexp: foreach $pat (@pats) { foo() if /$pat/ }
55 ref function in list context
56 make tr/// return histogram in list context?
57 Loop control on do{} et al
58 Explicit switch statements
60 compile to real threaded code