I say it's surprising because a hash algorithm is supposed to maintain a fairly constant lookup time when you put more data into it. Maybe switching between the hash and BTree options of DB_File would make a difference.

I have used BerkeleyDB with the 3.x series from Sleepycat pretty extensively. The main advantages it offers are in the area of fancier locking and caching. With a single writer and the data on a RAM disk, these aren't likely to make much difference. It's worth a shot though.

In reply to Re: Re: Re: Berkeley DB performance, profiling, and degradation... by perrin
in thread Berkeley DB performance, profiling, and degradation... by SwellJoe

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