Document the odd slowdown of ext/Encode/t/Unicode.t under

memory debuggers.

p4raw-id: //depot/perl@16630

1 files changed, 9 insertions, 1 deletions

diff --git a/pod/perlhack.pod b/pod/perlhack.pod
index 75d9241aac..08268022f4 100644
--- a/pod/perlhack.pod
+++ b/pod/perlhack.pod
@@ -2007,7 +2007,15 @@ standard Perl testset you would create and run Purify as:
 which would instrument Perl in memory, run Perl on test.pl,
 then finally report any memory problems.
 
-=head2 Compaq's/Digital's Third Degree
+B<NOTE>: as of Perl 5.8.0, the ext/Encode/t/Unicode.t takes
+extraordinarily long (hours?) to complete under Purify.  It has been
+theorized that it would eventually finish, but nobody has so far been
+patient enough :-) (This same extreme slowdown has been seen also with
+the Third Degree tool, so the said test must be doing something that
+is quite unfriendly for memory debuggers.)  It is suggested that you
+simply kill away that testing process.
+
+=head2 Compaq's/Digital's/HP's Third Degree
 
 Third Degree is a tool for memory leak detection and memory access checks.
 It is one of the many tools in the ATOM toolkit.  The toolkit is only