Check out Gatling[1], which is based on Scala, Akka, and Netty, and last time I checked works on Windows.
The only thing missing would be an out-of-box solution for distributed load generation, which I believe is being developed. But today, you can use a 'scale-out' approach[2] which gives you the ability to combine the data from multiple Gatling instances into a single report, but as a post-process step.
The only thing missing would be an out-of-box solution for distributed load generation, which I believe is being developed. But today, you can use a 'scale-out' approach[2] which gives you the ability to combine the data from multiple Gatling instances into a single report, but as a post-process step.
[1] http://gatling.io [2] http://gatling.io/docs/2.1.5/cookbook/scaling_out.html