There was talk about running python and java in the same application by using different version strings.
If you suspect one area of your application would run faster in java, maybe you could code it up in java and push it to the same server as your python application. I don't know how they would communicate (via AJAX? memcache?) but I think they would both use the same data store. On Dec 15, 3:29 pm, Andy Freeman <ana...@earthlink.net> wrote: > > Having said that, today it turns out for me that Java runtime is much > > more cost effective than Python runtime in some cases > > The question is not whether the Java or Python runtime is more cost > effective in some cases, it's whether it which is more cost effective > in your cases. > > Suppose that your application does one datastore operation for each > page and that datastore operation and other code takes the same amount > of time in both Python and Java. Datastore operations are so much > slower than startup that this alone would make the startup difference > almost unnoticeable. > > And, as someone else pointed out, development time is a cost too. > > On Dec 15, 10:02 am, Takashi Matsuo <matsuo.taka...@gmail.com> wrote: > > > Hello, > > > Today I noticed that App Engine Java environment became much faster > > then before. The spin up cost is about 700cpu_ms with the simplest > > servlet. Additionally, when it comes to serving with a hot instance, > > the cost reduces to 0-2cpu_ms, while python environment takes about > > 5-7cpu_ms even with the simplest handler. > > > To make it simple here, lets say Java takes 1cpu_ms while Python takes > > 6cpu_ms for serving very simple page. > > How many requests can they serve with 1 cpu hour? > > > Java: 3600000 requests/1 cpu hour > > Python: 600000 requests/1 cpu hour > > > This is a big deference; 6 times! If your app exceeds free quota, this > > deference can impact total amount of costs significantly. I'm a big > > Python fan and I have believed that appengine Python runtime is > > superior to Java runtime, so I've been trying to persuade others to > > use Python rather than Java for now. > > > Having said that, today it turns out for me that Java runtime is much > > more cost effective than Python runtime in some cases, so should I > > recommend others to use Apppengine Java if they are very sensitive to > > cpu costs? > > > I'd appreciate if anyone could share one's thoughts/experiences on this. > > > TIA > > > -- > > Takashi Matsuo > > Kay's daddy -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
