On 19 Nov 2015, at 12:26am, Nico Williams <nico at cryptonector.com> wrote:

> two concurrent scans of the same table should be able to go faster
> than the same two scans in series.

SQLite is not processor-bound, it's file-bound.  Both threads/processes need to 
continually read blocks from disk and a disk can only answer one request at a 
time.

Simon.

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