A Pallet for Benchmarking Common Runtime Operations (#4902)

* Benchmark pallet

* Add a bunch more benchmarks

* do nothing test

* new benchmarks

* Clean up extra tests

* Encode and Decode Vec<T::AccountId>

* Starting to migrate benchmarks to macro

* Use macro

* Remove call and storage

* Update Cargo.toml

* Add storage recalc benchmark

* Add support for custom functions in benchmark! macro

* Reset DB for storage recalc

* Feedback from review

* Add more comments

* Remove benchmark pallet from node

* Fix cargo files

* Fix comments

* Change `crate` to `super`

* missed one

* Use results of benchmark encode/decode

* Pass generic to extra functions

* reset macro to master

* Update lib.rs

* Update to use standard syntax

substrate/Cargo.lock

@@ -3966,6 +3966,20 @@ dependencies = [
  "sp-std",
 ]
 
+[[package]]
+name = "pallet-benchmark"
+version = "2.0.0-alpha.3"
+dependencies = [
+ "frame-benchmarking",
+ "frame-support",
+ "frame-system",
+ "parity-scale-codec",
+ "serde",
+ "sp-io",
+ "sp-runtime",
+ "sp-std",
+]
+
 [[package]]
 name = "pallet-collective"
 version = "2.0.0-alpha.3"