clojure/core.async — pull request #40 by travis (2013-12-08 01:28:03+00:00)
Title: Fall back to process.nextTick in queue-dispatcher

If we can't find MessageChannel or setImmediate use nextTick.

discussion here:

https://groups.google.com/forum/#!searchin/clojurescript/nextTick/clojurescript/RW1FMv0UoPE/hsMHI4SLKXYJ

discussion of the differences between setImmediate and nextTick here:

http://stackoverflow.com/questions/15349733/setimmediate-vs-nexttick