It looks like you're using GAE. Not having much experience with it, I'm wondering if GAE provides the CPU jailing, or did you have to write some voodoo yourself

It looks like you're using GAE. Not having much experience with it, I'm wondering if GAE provides the CPU jailing, or did you have to write some voodoo yourself? I ask because it's trivially easy to send a statement containing a single bytecode that takes a really long time to execute, at least in CPython: >>> print 999 * 0 # => 0, so not a bandwidth issue If I send this to your backend in a bunch of tabs (I didn't) could that be a DoS? Also, are you thinking of putting the backend code on github? EDIT: HN swallowed my exponentiation. That should read "print nine to the nine to the nine, times zero". Without the times zero, that's a huge number.