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