Our new performance tuning "best practices" document

[Per]

Hi all,

August was a pretty tough month for us, since the 1.5.2 release and
the datastore issues really exposed some of our inefficient code. But
we've learned and improved, and our app is faster than ever. Check
out our new "best practice" document:

http://www.small-improvements.com/app-engine-performance-tuning

Nothing earth-shattering, but upfront knowledge would have saved us a
lot of work. Happy to add more hints if you have any. Thanks again to
Simon Knott for suggesting to check out JARing classes to improve
speed. You're our hero!

Cheers,
Per

[Simon Knott]

Hi,

Thanks for taking the time to write up your thoughts - it's always really useful to learn from other peoples' experiences.  

I'm also glad to be a hero for a day :)

Cheers,

Simon

[James Broberg]

Great stuff Per - and you have an interesting application there. It
makes me wonder whether it would be worthwhile setting up a central
shared wiki somewhere so we could all contribute our best practices.
I'm sure many of us (I know I do) have some best practices scribbled
down internally that many of us have learn the hard way.

I had one query though:

"We learned the hard way though that quite often we had been getting
objects via a key (which means QUERY). We went through our DAOs and
removed plenty of those, replacing these with GETs."

Can you elaborate on this? Where you performing a query with a set of
keys? My understanding of this was that queries using a set of keys
was automagically converted to a highly efficient, low level get.

cheers

James

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[Thomas Wiradikusuma]

+1 for the Wiki idea.

[Jesus Alvarez]

Hi Simon and Per,

I am deploying my small app to gae and would like to benefit from jar packaging.

Could you give me a little more detail on how to do it?

The google eclipse plugin does all the "deploy" job and I really dont know exactly what is going on and how to create jars from .class. And what is more important, tell eclipse to upload these jars instead of classes

thanks a lot