Lightweight Databases

Immediate vs. Deferred Writing

By default, changes to the array are propagated to the file immediately
- This is called immediate writing
In some cases, this will be intolerably slow:

        for (@FILE) {
          s/^/>> /;
        }

This modifies record 0, rewriting 0 .. 1000
- Then it modifies record 1, rewriting 1 .. 1000
- Then it modifies record 2, rewriting 2 .. 1000
- This is intolerably slow