Full block import benchmark (#4865)

* full block import benchmark

* try rocksdb cache

* add profiling helper

* use random keyring instead of zero caching

* update docs

* add more io stats

* remove last sentence

* add ci job to see

* Update primitives/keyring/src/sr25519.rs

Co-Authored-By: Marcio Diaz <marcio.diaz@gmail.com>

* switch to 100tx-block

* remove ci script

Co-authored-by: Marcio Diaz <marcio@parity.io>

substrate/client/api/src/client.rs

@@ -125,6 +125,8 @@ pub struct IoInfo {
 	pub state_reads: u64,
 	/// State reads (keys) from cache.
 	pub state_reads_cache: u64,
+	/// State reads (keys) from cache.
+	pub state_writes: u64,
 }
 
 /// Usage statistics for running client instance.
@@ -143,7 +145,7 @@ pub struct UsageInfo {
 impl fmt::Display for UsageInfo {
 	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 		write!(f,
-			"caches: ({} state, {} db overlay), i/o: ({} tx, {} write, {} read, {} avg tx, {}/{} key cache reads/total)",
+			"caches: ({} state, {} db overlay), i/o: ({} tx, {} write, {} read, {} avg tx, {}/{} key cache reads/total, {} key writes)",
 			self.memory.state_cache,
 			self.memory.database_cache,
 			self.io.transactions,
@@ -152,6 +154,7 @@ impl fmt::Display for UsageInfo {
 			self.io.average_transaction_size,
 			self.io.state_reads_cache,
 			self.io.state_reads,
+			self.io.state_writes,
 		)
 	}
 }