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Diffstat (limited to 'ext/SDBM_File/sdbm/CHANGES')
| -rw-r--r-- | ext/SDBM_File/sdbm/CHANGES | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/ext/SDBM_File/sdbm/CHANGES b/ext/SDBM_File/sdbm/CHANGES new file mode 100644 index 0000000000..f7296d1b3a --- /dev/null +++ b/ext/SDBM_File/sdbm/CHANGES @@ -0,0 +1,18 @@ +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. |