Is google app engine 1.6.4 slower in local?

Question

Original issue

Since I changed the version from 1.6.3. to 1.6.4 I get serious performance problems working together with GWT in hosted mode.

Update 18/04/2012

The issue is reproductible also in 1.6.4.1 in dev environment. By now the best is to downgrade to 1.6.3

Update 09/07/2012

According to Kris Giesing: This is still not fixed in 1.7.0. A request that takes 330ms to process in 1.4.3, and 415ms to process in 1.6.3, takes 13740ms to process in 1.7.0. That's from timing the Java analysis code (no I/O) - almost a 40x slowdown.

Update 09/08/2012

Google acknowledged the problem in the issue 7282 of google appengine's public issue list.

Answer 1

This is a confirmed performance regression in 1.6.4. We (Google) are putting together a patch that contains a fix and we'll make it available as soon as we can.

Sorry for the trouble

(I'm the guy who introduced the regression)

Answer 2

Yeah, something is definitely wrong: http://code.google.com/p/googleappengine/issues/detail?id=7282

1.6.4 starts up extremely slow and takes an abnormal long amount of time to process each request.

Star it!

Answer 3

Even after the sdk 1.6.4.1... its still to slow!

The problem is to process the request, take too long. I cant test with real data anymore, because it is too slow.

Does anyone agree?

When i try to do a batch delete (pm.deletePersistentAll(ltToBeDelete);) of 50 entity, its took me 10 seconds.

Sorry, i'll have to downgrade to the 1.6.3 SDK.. too sad :(