Google App Engine - How Fast Is It?

Question

I visited some sites hosted on GAE and I found them very slow. Almost all of them take longer than usual to download.

Time: (in seconds) [YSlow]

9.9 giftag.com
3.1 hotskills.net 
1.9 jeeyo.net
1.5 appspot.com

Is this because the App Engine application cloud is too slow, Bigtable is too slow ... or what?

Answer 1

You use the YSlow plugin to measure this, and YSlow tells you why the site is slow (the tricky name is the key). For example, in the case of gifttag.com, YSlow reports that:

9 Javascript . . 3 . . 13 . CSS-.

, "E". .

appengine.

Answer 2

YSlow - , (css, javascript, , ..). , , App Engine, . App Engine python ( ), .

Answer 3

: Google App Engine ,

Answer 4

GAE , . , BigTable - Read Uncommitted .

No RDBMS can compute with this and still give consistency guarantees. Honestly, you really don't want to, because for some applications you need reliable guarantees of scalability.