quickly, but still, lots more pages will make PageSpecs more expensive.
* The backlinks calculation has to consider every link on every page
- in the wiki. (In practice, most pages only like to at most a few dozen
+ in the wiki. (In practice, most pages only link to at most a few dozen
other pages, so this is not a `O(N^2)`, but closer to `O(N)`.)
* Ikiwiki also reads and writes an `index` file, which contains information