One last comparison: RPM5 uses BerkeleyDB too, but with different tunables than
RPM4.
Here's essentially the same measurement as the previous comment:
```
1.15user 0.87system 0:02.11elapsed 96%CPU (0avgtext+0avgdata 584900maxresident)k
240inputs+390776outputs (7major+355303minor)pagefaults 0swaps
```
I add this comment to squelch BerkeleyDB haters from taking my measurements and
claiming
```"LMDB is Newer! Better! Faster! than BDB."```
I suspect the tunable that makes a huge difference is mmapsize (RPM5 sets this
to 256Mb).
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