<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Mar 21, 2016 at 1:53 PM, Christoph Hormann <span dir="ltr"><<a href="mailto:chris_hormann@gmx.de" target="_blank">chris_hormann@gmx.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
</span>The general problem with SQLite based files is that they are always read<br>
and written through the SQLite database engine which is not<br>
particularly good for sequential write and read operations. </blockquote><div>In my experience the engine defaults to one write operation per transaction which is very slow. If you are processing a large amount of data you need to explicitly open and then later (after many writes) commit the transaction if you want reasonable performance. </div></div><br></div></div>