On May 14, 2007, at 4:12 AM, Graham Stratton wrote:
Hi,
I'm getting some surprisingly poor performance from SQLAlchemy
in .get() operations. They're typically taking about 100-200ms, though
varying quite a lot. Just doing engine.execute() on the echo()ed SQL
takes about 10ms. The query
do you mean, the compilation of the Select object into a string ?
extremely unlikely. the main speed issue with get() is that of
fetching rows from DBAPI and processing into object results, which
goes up by a huge margin if you have a lot of eagerly loaded
instances attached to the get.
On May 14, 2007, at 11:27 AM, Graham Stratton wrote:
I ran a few get()s with non-existent ids (which are therefore
returning no rows, confirmed by setting engine.echo to 'debug'). The
average query time was about 80ms, though it varied from 56ms to
110ms.
I also called engine.execute with
