"Long" load time for development using ember-rails


I’ve got an Ember application that is currently at 129 files. Total browser load time, during development is 10+ seconds. The long load time is associated with downloading a large number of files (the total file size is relatively small). I’ve moved from webrick to using unicorn with 3 processes (3 seems to be the sweet spot, more doesn’t seem to gain me anything) to parallelize some of the loading. Unicorn with multiple processes provided a load time improvement, previously with webrick load time was closer to 20 seconds.

Googling has brought up suggestions like ‘set config.assets.debug = false’ (which I absolutely do not want) or trying to identify problems using rack-mini-profiler (I checked, everything seems nominal).

Has anyone else experienced a similar problem; What did you do?