--- /dev/null
+=head1 Perl TO-DO List
+
+This is a list of wishes for Perl. It is maintained by Nathan
+Torkington for the Perl porters. Send updates to
+I<perl5-porters@perl.org>. If you want to work on any of these
+projects, be sure to check the perl5-porters archives for past ideas,
+flames, and propaganda. This will save you time and also prevent you
+from implementing something that Larry has already vetoed. One set
+of archives may be found at:
+
+ http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/
+
+
+=head1 Infrastructure
+
+=head2 Mailing list archives
+
+Chaim suggests contacting egroup and asking them to archive the other
+perl.org mailing lists. Probably not advocacy, but definitely
+perl6-porters, etc.
+
+=head2 Bug tracking system
+
+Richard Foley I<richard@perl.org> is writing one. We looked at
+several, like gnats and the Debian system, but at the time we
+investigated them, none met our needs. Since then, Jitterbug has
+matured, and may be worth reinvestigation.
+
+The system we've developed will eventually be recipient of perlbug
+mail. New bugs are entered into a mysql database, and sent on to
+perl5-porters with the subject line rewritten to include a "ticket
+number" (unique ID for the new bug). If the incoming message already
+had a ticket number in the subject line, then the message is logged
+against that bug. There is a separate email interface (not forwarding
+to p5p) that permits porters to claim, categorize, and close tickets.
+
+The next desire is a web interface. It is hoped that code can be
+reused between the mail and the web interfaces.
+
+The current delay in implementation is caused by perl.org lockups.
+One suspect is the mail handling system, possibly going into loops.
+
+We're probably going to need a bugmaster, someone who will look at
+every new "bug" and kill those that we already know about, those
+that are not bugs at all, etc.
+
+=head2 Regression Tests
+
+The test suite for Perl serves two needs: ensuring features work, and
+ensuring old bugs have not been reintroduced. Both need work.
+
+Brent LaVelle (lavelle@metronet.com) has stepped forward to work on
+performance tests and improving the size of the test suite.
+
+=over 4
+
+=item Coverage
+
+Do the tests that come with Perl exercise every line (or every block,
+or ...) of the Perl interpreter, and if not then how can we make them
+do so?
+
+=item Regression
+
+No bug fixes should be made without a corresponding testsuite addition.
+This needs a dedicated enforcer, as the current pumpking is either too
+lazy or too stupid or both and lets enforcement wander all over the
+map. :-)
+
+=item __DIE__
+
+Tests that fail need to be of a form that can be readily mailed
+to perlbug and diagnosed with minimal back-and-forth's to determine
+which test failed, due to what cause, etc.
+
+=item suidperl
+
+We need regression/sanity tests for suidperl
+
+=item The 25% slowdown from perl4 to perl5
+
+This value may or may not be accurate, but it certainly is
+eye-catching. For some things perl5 is faster than perl4, but often
+the reliability and extensability have come at a cost of speed. The
+benchmark suite that Gisle released earlier has been hailed as both a
+fantastic solution and as a source of entirely meaningless figures.
+Do we need to test "real applications"? Can you do so? Anyone have
+machines to dedicate to the task? Identify the things that have grown
+slower, and see if there's a way to make them faster.
+
+=back
+
+=head2 Filenames
+
+Make filenames in the distribution and in the standard module set
+be 8.3 friendly where feasible. Good luck changing the standard
+modules, though. B<Done>.
+
+=head1 Configure
+
+Andy Dougherty maintain(ed|s) a list of "todo" items for the configure
+that comes with Perl. See Porting/pumpkin.pod in the latest
+source release.
+
+=head2 Install HTML
+
+Have "make install" give you the option to install HTML as well. This
+would be part of Configure. Andy Wardley (certified Perl studmuffin)
+will look into the current problems of HTML installation--is
+'installhtml' preventing this from happening cleanly, or is pod2html
+the problem? If the latter, Brad Appleton's pod work may fix the
+problem for free.
+
+=head1 Perl Language
+
+=head2 our ($var)
+
+Declare global variables (lexically or otherwise).
+
+=head2 64-bit Perl
+
+Verify complete 64 bit support so that the value of sysseek, or C<-s>, or
+stat(), or tell can fit into a perl number without losing precision.
+Work with the perl-64bit mailing list on perl.org.
+
+=head2 Figure a way out of $^(capital letter)
+
+Figure out a clean way to extend $^(capital letter) beyond
+the 26 alphabets. (${^WORD} maybe?)
+
+=head2 Prototypes
+
+=over 4
+
+=item Named prototypes
+
+Add proper named prototypes that actually work usefully.
+
+=item Indirect objects
+
+Fix prototype bug that forgets indirect objects.
+
+=item Method calls
+
+Prototypes for method calls.
+
+=item Context
+
+Return context prototype declarations.
+
+=item Scoped subs
+
+lexically-scoped subs, e.g. my sub
+
+=back
+
+=head2 Built-in globbing
+
+Currently the C<E<lt>*.cE<gt>> syntax calls the c shell. This causes
+problems on sites without csh, systems where fork() is expensive, and
+setuid environments. Decide between Glob::BSD and File::KGlob, move
+it into the core, and make Perl use it for globbing. Ben Holzman and
+Tye McQueen have claimed the pumpkin for this.
+
+=head2 Proper tied array support
+
+This was B<done> in 5.005 by Nick Ing-Simmons.
+
+=head1 Perl Internals
+
+=head2 magic_setisa
+
+C<magic_setisa> should be made to update %FIELDS [???]
+
+=head2 Foreign lines
+
+Perl should be more generous in accepting foreign line terminations.
+Mostly B<done> in 5.005.
+
+=head2 Garbage Collection
+
+There was talk of a mark-and-sweep garbage collector at TPC2, but the
+(to users) unpredictable nature of its behaviour put some off.
+Sarathy, I believe, did the work. Here's what he has to say:
+
+Yeah, I hope to implement it someday too. The points that were
+raised in TPC2 were all to do with calling DESTROY() methods, but
+I think we can accomodate that by extending bless() to stash
+extra information for objects so we track their lifetime accurately
+for those that want their DESTROY() to be predictable (this will be
+a speed hit, naturally, and will therefore be optional, naturally. :)
+
+[N.B. Don't even ask me about this now! When I have the time to
+write a cogent summary, I'll post it.]
+
+=head2 Reliable signals
+
+Sarathy and Dan Sugalski are working on this. Chip posted a patch
+earlier, but it was not accepted into 5.005. The issue is tricky,
+because it has the potential to greatly slow down the core.
+
+There are at least three things to consider:
+
+=over 4
+
+=item Alternate runops() for signal despatch
+
+Sarathy and Dan are discussed this on perl5-porters.
+
+=item Figure out how to die() in delayed sighandler
+
+=item Add tests for Thread::Signal
+
+=item Automatic tests against CPAN
+
+Is there some way to automatically build all/most of CPAN with
+the new Perl and check that the modules there pass all the tests?
+
+=back
+
+=head2 Interpolated regex performance bugs
+
+ while (<>) {
+ $found = 0;
+ foreach $pat (@patterns) {
+ $found++ if /$pat/o;
+ }
+ print if $found;
+ }
+
+The qr// syntax added in 5.005 has solved this problem, but
+it needs more thorough documentation.
+
+=head2 Memory leaks from failed eval/regcomp
+
+The only known memory leaks in Perl are in failed code or regexp
+compilation. Fix this. Hugo Van Der Sanden will attempt this but
+won't have tuits until January 1999.
+
+=head2 Make XS easier to use
+
+There was interest in SWIG from porters, but nothing has happened
+lately.
+
+=head2 Make embedded Perl easier to use
+
+This is probably difficult for the same reasons that "XS For Dummies"
+will be difficult.
+
+=head2 Namespace cleanup
+
+ symbol-space: "pl_" prefix for all global vars
+ "Perl_" prefix for all functions
+
+B<Done>.
+
+ CPP-space: restrict what we export from headers
+ stop malloc()/free() pollution unless asked
+ header-space: move into CORE/perl/
+ API-space: begin list of things that constitute public api
+
+=head2 MULTIPLICITY
+
+Complete work on safe recursive interpreters C<Perl-E<gt>new()>.
+Sarathy says that a reference implementation exists.
+
+=head2 MacPerl
+
+Chris Nandor and Matthias Neeracher are working on better integrating
+MacPerl into the Perl distribution.
+
+=head1 Documentation
+
+There's a lot of documentation that comes with Perl. The quantity of
+documentation makes it difficult for users to know which section of
+which manpage to read in order to solve their problem. Tom
+Christiansen has done much of the documentation work in the past.
+
+=head2 A clear division into tutorial and reference
+
+Some manpages (e.g., perltoot and perlreftut) clearly set out to
+educate the reader about a subject. Other manpages (e.g., perlsub)
+are references for which there is no tutorial, or are references with
+a slight tutorial bent. If things are either tutorial or reference,
+then the reader knows which manpage to read to learn about a subject,
+and which manpage to read to learn all about an aspect of that
+subject. Part of the solution to this is:
+
+=head2 Remove the artificial distinction between operators and functions
+
+History shows us that users, and often porters, aren't clear on the
+operator-function distinction. The present split in reference
+material between perlfunc and perlop hinders user navigation. Given
+that perlfunc is by far the larger of the two, move operator reference
+into perlfunc.
+
+=head2 More tutorials
+
+More documents of a tutorial nature could help. Here are some
+candidates:
+
+=over 4
+
+=item Regular expressions
+
+Robin Berjon (r.berjon@ltconsulting.net) has volunteered.
+
+=item I/O
+
+Mark-Jason Dominus (mjd@plover.com) has an outline for perliotut.
+
+=item pack/unpack
+
+This is badly needed. There has been some discussion on the
+subject on perl5-porters.
+
+=item Debugging
+
+Ronald Kimball (rjk@linguist.dartmouth.edu) has volunteered.
+
+=head2 Include a search tool
+
+perldoc should be able to 'grep' fulltext indices of installed POD
+files. This would let people say:
+
+ perldoc -find printing numbers with commas
+
+and get back the perlfaq entry on 'commify'.
+
+This solution, however, requires documentation to contain the keywords
+the user is searching for. Even when the users know what they're
+looking for, often they can't spell it.
+
+=head2 Include a locate tool
+
+perldoc should be able to help people find the manpages on a
+particular high-level subject:
+
+ perldoc -find web
+
+would tell them manpages, web pages, and books with material on web
+programming. Similarly C<perldoc -find databases>, C<perldoc -find
+references> and so on.
+
+We need something in the vicinity of:
+
+ % perl -help random stuff
+ No documentation for perl function `random stuff' found
+ The following entry in perlfunc.pod matches /random/a:
+ =item rand EXPR
+
+ =item rand
+
+ Returns a random fractional number greater than or equal to C<0> and less
+ than the value of EXPR. (EXPR should be positive.) If EXPR is
+ omitted, the value C<1> is used. Automatically calls C<srand()> unless
+ C<srand()> has already been called. See also C<srand()>.
+
+ (Note: If your rand function consistently returns numbers that are too
+ large or too small, then your version of Perl was probably compiled
+ with the wrong number of RANDBITS.)
+ The following pod pages seem to have /stuff/a:
+ perlfunc.pod (7 hits)
+ perlfaq7.pod (6 hits)
+ perlmod.pod (4 hits)
+ perlsyn.pod (3 hits)
+ perlfaq8.pod (2 hits)
+ perlipc.pod (2 hits)
+ perl5004delta.pod (1 hit)
+ perl5005delta.pod (1 hit)
+ perlcall.pod (1 hit)
+ perldelta.pod (1 hit)
+ perlfaq3.pod (1 hit)
+ perlfaq5.pod (1 hit)
+ perlhist.pod (1 hit)
+ perlref.pod (1 hit)
+ perltoc.pod (1 hit)
+ perltrap.pod (1 hit)
+ Proceed to open perlfunc.pod? [y] n
+ Do you want to speak perl interactively? [y] n
+ Should I dial 911? [y] n
+ Do you need psychiatric help? [y] y
+ <PELIZA> Hi, what bothers you today?
+ A Python programmer in the next cubby is driving me nuts!
+ <PELIZA> Hmm, thats fixable. Just [rest censored]
+
+=head2 Separate function manpages by default
+
+Perl should install 'manpages' for every function/operator into the
+3pl or 3p manual section. By default. The splitman program in the
+Perl source distribution does the work of turning big perlfunc into
+little 3p pages.
+
+=head2 Users can't find the manpages
+
+Make C<perldoc> tell users what they need to add to their .login or
+.cshrc to set their MANPATH correctly.
+
+=head2 Install ALL Documentation
+
+Make the standard documentation kit include the VMS, OS/2, Win32,
+Threads, etc information.
+
+=head2 Outstanding issues to be documented
+
+Tom has a list of 5.005_5* features or changes that require
+documentation.
+
+Create one document that coherently explains the delta between the
+last camel release and the current release. perldelta was supposed
+to be that, but no longer. The things in perldelta never seemed to
+get placed in the right places in the real manpages, either. This
+needs work.
+
+=head2 Replace man with a perl program
+
+Can we reimplement man in Perl? Tom has a start. I believe some of
+the Linux systems distribute a manalike. Alternatively, build on
+perldoc to remove the unfeatures like "is slow" and "has no apropos".
+
+=head2 Unicode tutorial
+
+We could use more work on helping people understand Perl's new
+Unicode support that Larry has created.
+
+=head2 Explain tool
+
+Given a piece of Perl code, say what it does. B::Deparse is doing
+this. B<Done>.
+
+=head1 Modules
+
+=head2 Update the POSIX extension to conform with the POSIX 1003.1 Edition 2
+
+The current state of the POSIX extension is as of Edition 1, 1991,
+whereas the Edition 2 came out in 1996. ISO/IEC 9945:1-1996(E),
+ANSI/IEEE Std 1003.1, 1996 Edition. ISBN 1-55937-573-6. The updates
+were legion: threads, IPC, and real time extensions.
+
+=head2 Module versions
+
+Automate the checking of versions in the standard distribution so
+it's easy for a pumpking to check whether CPAN has a newer version
+that we should be including?
+
+=head2 New modules
+
+Which modules should be added to the standard distribution? This ties
+in with the SDK discussed on the perl-sdk list at perl.org.
+
+=head2 ISA.pm
+
+Rename and alter ISA.pm. B<Done>. It is now base.pm.
+
+=head2 Profiler
+
+Make the profiler (Devel::DProf) part of the standard release, and
+document it well.
+
+=head2 Tie Modules
+
+=over 4
+
+=item VecArray
+
+Implement array using vec(). Nathan Torkington has working code to
+do this.
+
+=item SubstrArray
+
+Implement array using substr()
+
+=item VirtualArray
+
+Implement array using a file
+
+=item ShiftSplice
+
+Defines shift et al in terms of splice method
+
+=back
+
+=head2 Exceptions
+
+Figure out a coherent exception model, and implement it. Graham's
+Error.pm is an OO module that (I believe) requires core support.
+Are objects the right basis for this? Can it be done using the same
+text that the rest of Perl works on? The builtins will need to agree
+on a system.
+
+=head2 Procedural options
+
+Support procedural interfaces for the common cases of Perl's
+gratuitously OOO modules. Tom objects to "use IO::File" reading many
+thousands of lines of code.
+
+=head2 RPC
+
+Write a module for transparent, portable remote procedure calls. (Not
+core). This touches on the CORBA and ILU work.
+
+=head2 y2k localtime/gmtime
+
+Write a module, Y2k::Catch, which overloads localtime and gmtime's
+returned year value and catches "bad" attempts to use it.
+
+=head2 Export File::Find variables
+
+Make File::Find export C<$name> etc manually, at least if asked to.
+
+=head2 Ioctl
+
+Finish a proper Ioctl module.
+
+=head2 Debugger attach/detach
+
+Permit a user to debug an already-running program.
+
+=head2 Regular Expression debugger
+
+Create a visual profiler/debugger tool that stepped you through the
+execution of a regular expression point by point. Ilya has a module
+to color-code and display regular expression parses and executions.
+There's something at http://tkworld.org/ that might be a good start,
+it's a Tk/Tcl RE wizard, that builds regexen of many flavours.
+
+=head2 Alternative RE Syntax
+
+Make an alternative regular expression syntax that is accessed through
+a module. For instance,
+
+ use RE;
+ $re = start_of_line()
+ ->literal("1998/10/08")
+ ->optional( whitespace() )
+ ->literal("[")
+ ->remember( many( or( "-", digit() ) ) );
+
+ if (/$re/) {
+ print "time is $1\n";
+ }
+
+Newbies to regular expressions typically only use a subset of the full
+language. Perhaps you wouldn't have to implement the full feature set.
+
+=head2 Bundled modules
+
+Nicholas Clark (nick@flirble.org) had a patch for storing modules in
+zipped format. This needs exploring and concluding.
+
+=head2 Expect
+
+Adopt IO::Tty, make it as portable as Don Libes' "expect" (can we link
+against expect code?), and perfect a Perl version of expect. IO::Tty
+and expect could then be distributed as part of the core distribution,
+replacing Comm.pl and other hacks.
+
+=head2 GUI::Native
+
+A simple-to-use interface to native graphical abilities would
+be welcomed. Oh, Perl's access Tk is nice enough, and reasonably
+portable, but it's not particularly as fast as one would like.
+Simple access to the mouse's cut buffer or mouse-presses shouldn't
+required loading a few terabytes of Tk code.
+
+=head2 Update semibroken auxiliary tools; h2ph, a2p, etc.
+
+Kurt Starsinic is working on h2ph. mjd has fixed bugs in a2p in the
+past. a2p apparently doesn't work on nawk and gawk extensions.
+Graham Barr has an Include module that does h2ph work at runtime.
+
+=head2 POD Converters
+
+Brad's PodParser code needs to become part of the core, and the Pod::*
+and pod2* programs rewritten to use this standard parser. Currently
+the converters take different options, some behave in different
+fashions, and some are more picky than others in terms of the POD
+files they accept.
+
+=head2 pod2html
+
+A short-term fix: pod2html generates absolute HTML links. Make it
+generate relative links.
+
+=head2 Podchecker
+
+Something like lint for Pod would be good. Something that catches
+common errors as well as gross ones. Brad Appleton is putting
+together something as part of his PodParser work.
+
+=head1 Tom's Wishes
+
+=head2 Webperl
+
+Design a webperl environment that's as tightly integrated and as
+easy-to-use as Perl's current command-line environment.
+
+=head2 Mobile agents
+
+More work on a safe and secure execution environment for mobile
+agents would be neat; the Safe.pm module is a start, but there's a
+still a lot to be done in that area. Adopt Penguin?
+
+=head2 POSIX on non-POSIX
+
+Standard programming constructs for non-POSIX systems would help a
+lot of programmers stuck on primitive, legacy systems. For example,
+Microsoft still hasn't made a usable POSIX interface on their clunky
+systems, which means that standard operations such as alarm() and
+fork(), both critical for sophisticated client-server programming,
+must both be kludged around.
+
+I'm unsure whether Tom means to emulate alarm( )and fork(), or merely
+to provide a document like perlport.pod to say which features are
+portable and which are not.
+
+=head2 Portable installations
+
+Figure out a portable semi-gelled installation, that is, one without
+full paths. Larry has said that he's thinking about this. Ilya
+pointed out that perllib_mangle() is good for this.
+
+=head1 Win32 Stuff
+
+=head2 Automate maintenance of most PERL_OBJECT code
+
+B<Done>, says Sarathy.
+
+=head2 Get PERL_OBJECT building under gcc
+
+B<Part done>, according to Sarathy. It builds under egcs on win32,
+but doesn't run for occult reasons. If anyone knows the right
+breed of chicken to sacrifice, please speak up.
+
+=head2 Rename new headers to be consistent with the rest
+
+=head2 Sort out the spawnvp() mess
+
+=head2 Work out DLL versioning
+
+=head2 Get PERL_OBJECT building on non-win32
+
+=head2 Style-check
+
+=head1 Would be nice to have
+
+=over 4
+
+=item C<pack "(stuff)*">
+
+=item Contiguous bitfields in pack/unpack
+
+=item lexperl
+
+=item Bundled perl preprocessor
+
+=item Use posix calls internally where possible
+
+=item gettimeofday
+
+Joshua Pritikin sent patches to p5p in early December 1998.
+
+=item format BOTTOM
+
+=item -iprefix.
+
+Added in 5.004_70. B<Done>
+
+=item -i rename file only when successfully changed
+
+=item All ARGV input should act like <>
+
+=item report HANDLE [formats].
+
+=item support in perlmain to rerun debugger
+
+=item reference to compiled regexp
+
+B<done> This is the qr// support in 5.005.
+
+=item lvalue functions
+
+Tuomas Lukka, on behalf of the PDL project, greatly desires this and
+Ilya has a patch for it (probably against an older version of Perl).
+Tuomas points out that what PDL really wants is lvalue I<methods>,
+not just subs.
+
+=back
+
+=head1 Possible pragmas
+
+=head2 'less'
+
+(use less memory, CPU)
+
+=head1 Optimizations
+
+=head2 constant function cache
+
+=head2 eval qw() at compile time
+
+qw() is presently compiled as a call to split. This means the split
+happens at runtime. Change this so qw() is compiled as a real list
+assignment. This also avoids surprises like:
+
+ $a = () = qw(What will $a hold?);
+
+B<Done>. Tom Hughes submitted a patch that went into 5.005_55.
+
+=head2 foreach(reverse...)
+
+=head2 Cache eval tree
+
+Unless lexical outer scope used (mark in &compiling?).
+
+=head2 rcatmaybe
+
+=head2 Shrink opcode tables
+
+Via multiple implementations selected in peep.
+
+=head2 Cache hash value
+
+Not a win, according to Guido.
+
+=head2 Optimize away @_ where possible
+
+=head2 Optimize sort by { $a <=> $b }
+
+Greg Bacon added several more sort optimizations. These have
+made it into 5.005_55, thanks to Hans Mulder.
+
+=head2 Rewrite regexp parser for better integrated optimization
+
+The regexp parser was rewritten for 5.005. Ilya's the regexp guru.
+
+=head1 Vague possibilities
+
+=over 4
+
+=item ref function in list context
+
+This seems impossible to do without substantially breaking code.
+
+=item make tr/// return histogram in list context?
+
+=item Loop control on do{} et al
+
+=item Explicit switch statements
+
+Nobody has yet managed to come up with a switch syntax that would
+allow for mixed hash, constant, regexp checks. Submit implementation
+with syntax, please.
+
+=item compile to real threaded code
+
+=item structured types
+
+=item autocroak?
+
+B<Done>. This is the Fatal.pm module, so any builtin that that does
+not return success automatically die()s. If you're feeling brave, tie
+this in with the unified exceptions scheme.
+
+=item Modifiable $1 et al
+
+The intent is for this to be a means of editing the matched portions of
+the target string.
+
+=back
+
+=head1 To Do Or Not To Do
+
+These are things that have been discussed in the past and roundly
+criticized for being of questionable value.
+
+=head2 Making my() work on "package" variables
+
+Being able to say my($Foo::Bar), something that sounds ludicrous and
+the 5.006 pumpking has mocked.
+
+=head2 "or" testing defined not truth
+
+We tell people that C<||> can be used to give a default value to a
+variable:
+
+ $children = shift || 5; # default is 5 children
+
+which is almost (but not):
+
+ $children = shift;
+ $children = 5 unless $children;
+
+but if the first argument was given and is "0", then it will be
+considered false by C<||> and C<5> used instead. Really we want
+an C<||>-like construct that behaves like:
+
+ $children = shift;
+ $children = 5 unless defined $children;
+
+Namely, a C<||> that tests defined-ness rather than truth. One
+was discussed, and a patch submitted, but the objections were many:
+
+=over 4
+
+=item Punctuation
+
+We're running out of punctuation. C<|||>, the suggested operator, is
+very very verbose.
+
+=item Orthogonality
+
+To work like the other logical operators, there'd need to be C<|||=>
+and "English" equivalents (as there is "or" for "||"). We couldn't
+settle on an equivalent we liked. Does there also have to be an "&&"
+that tests truth?
+
+=back
+
+While there were objections, many still feel the need.
+
+=head2 "dynamic" lexicals
+
+ my $x;
+ sub foo {
+ local $x;
+ }
+
+Localizing, as Tim Bunce points out, is a separate concept from
+whether the variable is global or lexical. Chip Salzenberg had
+an implementation once, but Larry thought it had potential to
+confuse.
+
+=head2 "class"-based, rather than package-based "lexicals"
+
+This is like what the Alias module provides, but the variables would
+be lexicals reserved by perl at compile-time, which really are indices
+pointing into the pseudo-hash object visible inside every method so
+declared.
+
+=head1 Threading
+
+=head2 Modules
+
+Which of the standard modules are thread-safe? Which CPAN modules?
+How easy is it to fix those non-safe modules?
+
+=head2 Testing
+
+Threading is still experimental. Every reproducible bug identifies
+something else for us to fix. Find and submit more of these problems.
+
+=head2 $AUTOLOAD
+
+=head2 exit/die
+
+Consistent semantics for exit/die in threads.
+
+=head2 External threads
+
+Better support for externally created threads.
+
+=head2 Thread::Pool
+
+=head2 thread-safety
+
+Spot-check globals like statcache and global GVs for thread-safety.
+"B<Part done>", says Sarathy.
+
+=head2 Per-thread GVs
+
+According to Sarathy, this would make @_ be the same in threaded
+and non-threaded, as well as helping solve problems like filehandles
+(the same filehandle currently cannot be used in two threads).
+
+=head1 Compiler
+
+=head2 Optimization
+
+The compiler's back-end code-generators for creating bytecode or
+compilable C code could use optimization work.
+
+=head2 Byteperl
+
+Figure out how and where byteperl will be built for the various
+platforms.
+
+=head2 Precompiled modules
+
+Save byte-compiled modules on disk.
+
+=head2 Executables
+
+Auto-produce executable.
+
+=head2 Typed lexicals
+
+Typed lexicals should affect B::CC::load_pad.
+
+=head2 Win32
+
+Workarounds to help Win32 dynamic loading.
+
+=head2 Status variable
+
+$^C to track compiler/checker status. B<Done> in 5.005_54.
+
+=head2 END blocks
+
+END blocks need saving in compiled output.
+
+=head2 _AUTOLOAD
+
+_AUTOLOAD prodding.
+
+=head2 comppadlist
+
+Fix comppadlist (names in comppad_name can have fake SvCUR
+from where newASSIGNOP steals the field).
+
+=head2 Cached compilation
+
+Can we install modules as bytecode?
+
+=cut