Add baseline benchmark for sr25519 verification (#10414)

* Add baseline benchmark for sr25519 verification

* cargo run --quiet --release --features=runtime-benchmarks --manifest-path=bin/node/cli/Cargo.toml -- benchmark --chain=dev --steps=50 --repeat=20 --pallet=frame_benchmarking --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./frame/benchmarking/src/weights.rs --template=./.maintain/frame-weight-template.hbs

* Register keystore for correct test externalities

* Update frame/benchmarking/src/baseline.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

* fix build

Co-authored-by: Parity Bot <admin@parity.io>
Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/frame/benchmarking/src/baseline.rs

@@ -23,9 +23,23 @@
 use crate::benchmarks;
 use codec::Encode;
 use frame_system::Pallet as System;
-use sp_runtime::traits::Hash;
+use sp_application_crypto::KeyTypeId;
+use sp_runtime::{
+	traits::{AppVerify, Hash},
+	RuntimeAppPublic,
+};
 use sp_std::prelude::*;
 
+pub const TEST_KEY_TYPE_ID: KeyTypeId = KeyTypeId(*b"test");
+
+mod app_sr25519 {
+	use super::TEST_KEY_TYPE_ID;
+	use sp_application_crypto::{app_crypto, sr25519};
+	app_crypto!(sr25519, TEST_KEY_TYPE_ID);
+}
+
+type SignerId = app_sr25519::Public;
+
 pub struct Pallet<T: Config>(System<T>);
 pub trait Config: frame_system::Config {}
 
@@ -75,6 +89,23 @@ benchmarks! {
 		assert!(hash != T::Hash::default());
 	}
 
+	sr25519_verification {
+		let i in 1 .. 100;
+
+		let public = SignerId::generate_pair(None);
+
+		let sigs_count: u8 = i.try_into().unwrap();
+		let msg_and_sigs: Vec<_> = (0..sigs_count).map(|j| {
+			let msg = vec![j, j];
+			(msg.clone(), public.sign(&msg).unwrap())
+		})
+		.collect();
+	}: {
+		msg_and_sigs.iter().for_each(|(msg, sig)| {
+			assert!(sig.verify(&msg[..], &public));
+		});
+	}
+
 	#[skip_meta]
 	storage_read {
 		let i in 0 .. 1_000;
@@ -169,7 +200,13 @@ pub mod mock {
 	impl super::Config for Test {}
 
 	pub fn new_test_ext() -> sp_io::TestExternalities {
+		use sp_keystore::{testing::KeyStore, KeystoreExt, SyncCryptoStorePtr};
+		use sp_std::sync::Arc;
+
 		let t = frame_system::GenesisConfig::default().build_storage::<Test>().unwrap();
-		sp_io::TestExternalities::new(t)
+		let mut ext = sp_io::TestExternalities::new(t);
+		ext.register_extension(KeystoreExt(Arc::new(KeyStore::new()) as SyncCryptoStorePtr));
+
+		ext
 	}
 }