perl 5.000perl-5.000

[editor's note: this commit combines approximate 4 months of furious
releases of Andy Dougherty and Larry Wall - see pod/perlhist.pod for
details.  Andy notes that;
 
Alas neither my "Irwin AccuTrack" nor my DC 600A quarter-inch cartridge 
backup tapes from that era seem to be readable anymore.  I guess 13 years 
exceeds the shelf life for that backup technology :-(.
]

1 files changed, 18 insertions, 0 deletions

diff --git a/ext/SDBM_File/sdbm/CHANGES b/ext/SDBM_File/sdbm/CHANGES
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+++ b/ext/SDBM_File/sdbm/CHANGES
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+Changes from the earlier BETA releases.
+
+o dbm_prep does everything now, so dbm_open is just a simple
+  wrapper that builds the default filenames. dbm_prep no longer
+  requires a (DBM *) db parameter: it allocates one itself. It
+  returns (DBM *) db or (DBM *) NULL.
+
+o makroom is now reliable. In the common-case optimization of the page
+  split, the page into which the incoming key/value pair is to be inserted
+  is write-deferred (if the split is successful), thereby saving a cosly
+  write.  BUT, if the split does not make enough room (unsuccessful), the
+  deferred page is written out, as the failure-window is now dependent on
+  the number of split attempts.
+
+o if -DDUFF is defined, hash function will also use the DUFF construct.
+  This may look like a micro-performance tweak (maybe it is), but in fact,
+  the hash function is the third most-heavily used function, after read
+  and write.