It's worth noting that startup times with 1.9 are longer than with 1.8 (in my experience anyway). Startup times for my 1.8 instances on Heroku are sub-second. W

It's worth noting that startup times with 1.9 are longer than with 1.8 (in my experience anyway). Startup times for my 1.8 instances on Heroku are sub-second. Whereas instances running 1.9 are 6+ seconds! Disclaimer: I haven't dug into this issue much, so its possible other factors are the cause...