You'll probably want to look at and test backends where you can pick your processor speed to see what kind of performance you can get. I think the front-end instances are configured similar to B1's, but i can't remember if I saw that somewhere or am basing it on the fact that in the new pricing model on-demand hours are priced at $.08, so maybe it is similar to B2, maybe someone else knows. Also, it was mentioned a while back that a B8 can't do any faster calculations on a single thread than a B4 so you'll probably see similar results if you test your computations on a B4 and B8. But once again, not completely sure about that assertion. The upside to a B8 from a B4 is, from what I gathered, increased memory and if using Java then can have multiple requests running at same time on different threads, it's just that a single thread can't do better than B4.
B1128MB600MHz$0.08B2 (default)256MB1.2GHz$0.16B4512MB2.4GHz$0.32B81024MB 4.8GHz$0.64 Stephen CortexConnect http://cortexconnect.appspot.com On Wed, Jul 27, 2011 at 5:00 PM, SudoKU <[email protected]> wrote: > I am a new comer to the Google App Engine. I was testing whether I can use > Google app engine for a real-time calculations of our geophysical model. The > idea is that scientists can calculate / run my model online and plot the > results rather than running natively on their computer. I am testing the > free version of google app engine. To test the speed of computation, I wrote > the following loop in the Java servlet. I wanted to know how fast Google App > Engine can compute my codes. > > > > for (int i = 1 ; i < 100000 ; i = i+1) > > { > > for (int j = 1 ; j < 100000 ; j = j+1) > > { > > for (int k = 1 ; k < 100000 ; k = k+1) > > { > > int h = i + j + k; > > } > > > > } > > > > } > > > While the local deployment in my laptop (I am using eclipse & google plugin > - localhost:8888) completed the calculation in 8 seconds, google app reports > error after a few seconds. If I remove the outer loop, Google App engine > complete the calculation in about 4-6 seconds. While the actual > computational burden of my model can be less than that of the above codes, I > was a disappointed by the fact that Goggle App Engine runs slower than my > laptop. Is this because of the free version ?. Will the speed increase, if I > pay for App Engine use ? > > > Thanks > > > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To view this discussion on the web visit > https://groups.google.com/d/msg/google-appengine-java/-/VpNTC_2FI3wJ. > To post to this group, send email to > [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
