Issue description:

When you have a Storage Drawer sytsem connected by an external Storage Bus and try to pull out items that are not there I get huge FPS spikes. Even worse when the Items that I try to pull out are requested by a crafter trying to craft stuff for an exporter with a crafting card.

Steps to reproduce:

1. build basic RS network with a crafter and teach it to craft a vanilla furnace
2. connect it to a Storage drawer system
3. set up an export for some crafted Item (in this case furnaces, in my real world it was sugar) using an Exporter with a crafting card
4. provide the storage drawer (input to the controller) with an insufficent supply of items by setting up a cobblegen (I used ExtraUtils stuff without speed upgrades)
5. Watch your FPS spike like crazy when RS tries to pull(/check for) cobble for the requested crafting process...
6. Try it with bigger/smaller Drawer Systems or Chests or other external Storage solutions to see a difference in the impact.

Check out my screenshot for the debug setup I used. In real world the spikes are a lot worse (I got two exporter with crafting cards requesting sugar and a bunch of Ender-IO conduits which are a pain anyway :D) to a point I call unplayable.

Interestingly enough, this also happens with a chest instead of a Drawer system, it's just a lot less intense:

my FPS as a baseline (slightly better FPS than the chest version):

Conclusion: For some reason the way you check external storage for items with you Crafter drops FPS. The bigger the storage it has to check, the bigger the drop.

reals world screenshots:

the exporters requesting sugar:

without the DrawerController (the first 20% of the timeline was before I broke it):

(the single big spikes I haven't figures out yet. suspecting something else in Refined STorage that I could not identify yet. They go away when I break the controller, so it has to be something else in RS)

Version:

• Minecraft: 1.10.2
• Forge: 12.18.1.2088
• Refined Storage: 1.1.2

Does this issue occur on a server? [not testet]

already reported

is it really that hard to read the issue tracker before reporting something?

@raoulvdberge I did read the tracker. The only close thing is the Colossal Chest thing which you marked as crossmod. I decided to post my specific results because they indicate it's not a crossmod (which I think means multiple mods interacting) issue and instead one that happens because of RS on it's own.
I am however sorry if I just got confused with the tags and you are already aware of what exactly is happening. I was just trying to help.

see issue #277