Investigate db slowdown

[chenglou]

The db takes a couple of hundred of ms running, for some reason. It's erratic too (sometimes only takes a few ms).

@vramana

[vramana]

I don't know how to approach this even. On my machine, I saw it to be around 350ms.

[chenglou]

Still means something's wrong. It should be around 10ms

[jordwalke]

I definitely noticed a significant slowdown when using rebel (compared to the previous version I was using). I'll let you know if I think of other reasons why, but did we make sure to blacklist searching of node_modules that aren't actually related? That could take a huge amount of time with a typical npm install.

[jordwalke]

Not sure if this is relevant, but I see a bunch of these warnings, not sure if it is related to the slowdown:

findlib: [WARNING] Package bytes has multiple definitions in

/Users/jwalke/Desktop/MyApp/node_modules/ocamlfind-actual/_build/ocamlfind/lib/bytes/META,
/Users/jwalke/Desktop/MyApp/node_modules/ocamlfind/_build/ocamlfind/lib/bytes/META