This is something put together for a blog post. See the post here: http://segfault88.github.io/posts/rubyvgo1/ - go read that, if you have questions/comments hit me up on twitter or here.

It got a bit long...

Fake API in Go that essentially sleeps a lot.

• /slow: sleep between 2-400 ms then return.
• /bad: approx 50% of the time return in 50-100ms, the rest of the time sleep for 3 seconds.
• /timeout: sleep for 10 seconds.

Run it with:

PORT=8000 go run main.go

Simple sinatra app that uses Net::HTTP to call the API. Run it with:

unicorn -p 8800 -c unicorn.rb

(install the sinatra and unicorn gems)

Yes, this could be done better with eventmachine - but to mimic the situation in "real life" I have used unicorn here.

Essentially the same thing as the Ruby version but in Go with the Gorilla websocket library. Run it with:

PORT=8880 go run main.go

It's a bit better. But the limit of outstanding ajax requests to 2 blocks it up. It would work much better than the ruby version for more users though.

go run main.go

On port 8888. Much better, we kick off all the requests, then send the pending updates to the brower when it checks in / polls.

go run main.go

On port 8889. Definately the best! Works heaps better, the update gets pushed out to the client browser just about right away.