docs: add asciidoc docs for use with refinedsites

docs/pages/advanced-usage/profiling.adoc

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+= Profiling
+
+If you have a performance, it's best to make a `.nps` file that you can send to the developers so that they can investigate further.
+
+== Installing Sampler
+
+Sampler is a mod by Player that generates .nps files.
+You can download it from link:https://forum.industrial-craft.net/thread/10820[here].
+
+=== For Minecraft 1.12
+
+link:http://files.player.to/sampler-1.73.jar[http://files.player.to/sampler-1.73.jar]
+
+=== For Minecraft 1.11
+
+link:http://files.player.to/sampler-1.72.1.jar[http://files.player.to/sampler-1.72.1.jar]
+
+=== For Minecraft 1.10
+
+link:http://files.player.to/sampler-1.69.3.jar[http://files.player.to/sampler-1.69.3.jar]
+
+== Running Sampler
+
+Then you can `/sampler start` and `/sampler stop` while it's lagging.
+
+Then a simple `/sampler export [name of exported nps file here]` will write out the .nps file that can be read by the developers in VisualVM.
+
+== Where to run Sampler?
+
+- Is it a performance on the server, like tick lag?
+Run Sampler *on the server*, NOT on your client!
+- Is it a performance on the client, like FPS lag?
+Run Sampler *on the client*, NOT on your server!