Commit | Line | Data |
---|---|---|
463ee0b2 LW |
1 | Changes from the earlier BETA releases. |
2 | ||
3 | o dbm_prep does everything now, so dbm_open is just a simple | |
4 | wrapper that builds the default filenames. dbm_prep no longer | |
5 | requires a (DBM *) db parameter: it allocates one itself. It | |
6 | returns (DBM *) db or (DBM *) NULL. | |
7 | ||
8 | o makroom is now reliable. In the common-case optimization of the page | |
9 | split, the page into which the incoming key/value pair is to be inserted | |
10 | is write-deferred (if the split is successful), thereby saving a cosly | |
11 | write. BUT, if the split does not make enough room (unsuccessful), the | |
12 | deferred page is written out, as the failure-window is now dependent on | |
13 | the number of split attempts. | |
14 | ||
15 | o if -DDUFF is defined, hash function will also use the DUFF construct. | |
16 | This may look like a micro-performance tweak (maybe it is), but in fact, | |
17 | the hash function is the third most-heavily used function, after read | |
18 | and write. |