Why does a JRuby application on App Engine take so long to start?

Posted by Major Tom on Stack Overflow See other posts from Stack Overflow or by Major Tom
Published on 2010-03-30T18:11:20Z Indexed on 2010/03/30 18:13 UTC
Read the original article Hit count: 359

Filed under:

google-app-engine

|

jruby

|

java

|

ruby

I'm considering using JRuby on App Engine but have heard that Juby app on App Engine have a long startup lag. Why is this?

Is it because the JRuby jar files are so large that a cold startup requires them to be loaded into memory before the app can start serving?

That would be my guess but I'm not sure if that's a precise technical explanation.

© Stack Overflow or respective owner

Related posts about google-app-engine

unittest import error with virtualenv + google-app-engine-django

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm working with google-app-engine-django + zipped django. Just running "python manage.py test" succeeded without error. But with virtualenv, test was failed with "import unittest error". same error with Django 1.1. - OSX 10.5.6 - google-app-engine-django (r101 via svn) : r100 was failed with launcher… >>> More
Could not import Django settings into Google App Engine

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello all you Google App Engine experts, I have used Django a little before but am new to Google App Engine and am trying to use it's development web server with Django for the first time. I don't know if this is relevent but I previously had Django 1.1 and Python 2.6 on my Windows XP and even… >>> More
How does Google App Engine precompile Java ?

as seen on Stack Overflow - Search for 'Stack Overflow'
App Engine uses a "precompilation" process with the Java bytecode of an app to enhance the performance of the app in the Java runtime environment. Precompiled code functions identically to the original bytecode. Is there any detailed information what this does? >>> More
Creating a session scoped bean in Google App Engine using Spring 2.5

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am trying to create a session bean in spring mvc. I am having the following error message when I run my google app engine server in my local box: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'siteController' defined in ServletContext resource [/WEB-INF/springapp-servlet… >>> More
Google App Engine UI Widgets

as seen on Stack Overflow - Search for 'Stack Overflow'
Are there any UI widgets available to the python side of Google App Engine? I'd like something like the collapsed/expanded views of Google Groups threads. Are these type things limited to the GWT side? >>> More

Related posts about jruby

AppEngine JRuby - OutOfMemoryError: Java heap space - can it be solved?

as seen on Stack Overflow - Search for 'Stack Overflow'
I use AppEngine JRuby on Rails (SDK version 1.3.3.1) - a problem I encounter often is that after a few requests the server is getting really SLOW, until it dies and throws OutOfMemoryError on the terminal (OSX). The requests themselves are very lightweight, not more than looking for an entity or… >>> More
Java Errors with jRuby on Rails on Google App Engine

as seen on Stack Overflow - Search for 'Stack Overflow'
I followed all of the instructions so far from: http://code.google.com/p/appengine-jruby/wiki/RunningRails and http://gist.github.com/268192 Currently, I'm just trying to get to hello world. I'm getting these errors when I just run the dev_appserver.rb 238:hello-world jwang392$ dev_appserver… >>> More
Impossible to do POSTs with appengine-jruby/RoR: Reflection is not allowed

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to build a site with RoR on Google App Engine. I'm using the google-appengine gem (http://appengine-jruby.googlecode.com) and following the instructions in (http://gist.github.com/268192). The problem is that I can't submit ANY form! I've already tried this in two diferent clean Win 7… >>> More
Rake uses jruby instead of ruby after jruby install

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I recently installed jruby on a machine that also has ruby installed on it. When I do rake something it now appears to be using the jruby interpreter. I'd like rake to use the ruby interpreter. I'd appreciate any help. >>> More
JRuby 1.5 to provide native support for Ant

as seen on Gooder Code - Search for 'Gooder Code'
In case you haven’t heard, the next version of JRuby will provide native support for Ant. Much like antwrap, you will be able to call ant tasks straight from Ruby. There are some pretty good examples here, but no examples of how to get it running on your machine today. First, you will… >>> More