chore: reduce copy times for bytes in core-hashing (#13519)

* chore: reduce copy bytes for core-hashing

* improve by suggestions and remove unused `xx_into`

* chore: replace sha2 crate by `sp_core::hashing` for pallet-alliance

* fix features

* use sp-core-hashing directly

* add to dev-dep

substrate/Cargo.lock

@@ -5285,8 +5285,8 @@ dependencies = [
  "pallet-identity",
  "parity-scale-codec",
  "scale-info",
- "sha2 0.10.6",
  "sp-core",
+ "sp-core-hashing",
  "sp-io",
  "sp-runtime",
  "sp-std",

substrate/frame/alliance/Cargo.toml

@@ -14,7 +14,6 @@ targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
 array-bytes = { version = "4.1", optional = true }
-sha2 = { version = "0.10.1", default-features = false, optional = true }
 log = { version = "0.4.14", default-features = false }
 
 codec = { package = "parity-scale-codec", version = "3.2.2", default-features = false, features = ["derive"] }
@@ -22,6 +21,7 @@ scale-info = { version = "2.0.1", default-features = false, features = ["derive"
 
 sp-std = { version = "5.0.0", default-features = false, path = "../../primitives/std" }
 sp-core = { version = "7.0.0", default-features = false, path = "../../primitives/core" }
+sp-core-hashing = { version = "5.0.0", default-features = false, path = "../../primitives/core/hashing", optional = true }
 sp-io = { version = "7.0.0", default-features = false, path = "../../primitives/io" }
 sp-runtime = { version = "7.0.0", default-features = false, path = "../../primitives/runtime" }
 
@@ -34,13 +34,14 @@ pallet-collective = { version = "4.0.0-dev", path = "../collective", default-fea
 
 [dev-dependencies]
 array-bytes = "4.1"
-sha2 = "0.10.1"
+sp-core-hashing = { version = "5.0.0", default-features = false, path = "../../primitives/core/hashing" }
 pallet-balances = { version = "4.0.0-dev", path = "../balances" }
 pallet-collective = { version = "4.0.0-dev", path = "../collective" }
 
 [features]
 default = ["std"]
 std = [
+	"sp-core-hashing?/std",
 	"pallet-collective?/std",
 	"frame-benchmarking?/std",
 	"log/std",
@@ -56,7 +57,7 @@ std = [
 ]
 runtime-benchmarks = [
 	"array-bytes",
-	"sha2",
+	"sp-core-hashing",
 	"frame-benchmarking/runtime-benchmarks",
 	"sp-runtime/runtime-benchmarks",
 	"frame-support/runtime-benchmarks",

substrate/frame/alliance/src/benchmarking.rs

@@ -40,11 +40,8 @@ fn assert_last_event<T: Config<I>, I: 'static>(generic_event: <T as Config<I>>::
 }
 
 fn cid(input: impl AsRef<[u8]>) -> Cid {
-	use sha2::{Digest, Sha256};
-	let mut hasher = Sha256::new();
-	hasher.update(input);
-	let result = hasher.finalize();
-	Cid::new_v0(&*result)
+	let result = sp_core_hashing::sha2_256(input.as_ref());
+	Cid::new_v0(result)
 }
 
 fn rule(input: impl AsRef<[u8]>) -> Cid {

substrate/frame/alliance/src/mock.rs

@@ -368,11 +368,8 @@ pub fn new_bench_ext() -> sp_io::TestExternalities {
 }
 
 pub fn test_cid() -> Cid {
-	use sha2::{Digest, Sha256};
-	let mut hasher = Sha256::new();
-	hasher.update(b"hello world");
-	let result = hasher.finalize();
-	Cid::new_v0(&*result)
+	let result = sp_core_hashing::sha2_256(b"hello world");
+	Cid::new_v0(result)
 }
 
 pub fn make_remark_proposal(value: u64) -> (RuntimeCall, u32, H256) {

substrate/primitives/core/hashing/src/lib.rs

@@ -35,48 +35,22 @@ pub fn blake2_512_into(data: &[u8], dest: &mut [u8; 64]) {
 
 /// Do a Blake2 512-bit hash and return result.
 pub fn blake2_512(data: &[u8]) -> [u8; 64] {
-	let mut r = [0; 64];
-	blake2_512_into(data, &mut r);
-	r
-}
-
-/// Do a Blake2 256-bit hash and place result in `dest`.
-pub fn blake2_256_into(data: &[u8], dest: &mut [u8; 32]) {
-	type Blake2b256 = blake2::Blake2b<U32>;
-	dest.copy_from_slice(Blake2b256::digest(data).as_slice());
+	blake2::Blake2b512::digest(data).into()
 }
 
 /// Do a Blake2 256-bit hash and return result.
 pub fn blake2_256(data: &[u8]) -> [u8; 32] {
-	let mut r = [0; 32];
-	blake2_256_into(data, &mut r);
-	r
-}
-
-/// Do a Blake2 128-bit hash and place result in `dest`.
-pub fn blake2_128_into(data: &[u8], dest: &mut [u8; 16]) {
-	type Blake2b128 = blake2::Blake2b<U16>;
-	dest.copy_from_slice(Blake2b128::digest(data).as_slice());
+	blake2::Blake2b::<U32>::digest(data).into()
 }
 
 /// Do a Blake2 128-bit hash and return result.
 pub fn blake2_128(data: &[u8]) -> [u8; 16] {
-	let mut r = [0; 16];
-	blake2_128_into(data, &mut r);
-	r
-}
-
-/// Do a Blake2 64-bit hash and place result in `dest`.
-pub fn blake2_64_into(data: &[u8], dest: &mut [u8; 8]) {
-	type Blake2b64 = blake2::Blake2b<U8>;
-	dest.copy_from_slice(Blake2b64::digest(data).as_slice());
+	blake2::Blake2b::<U16>::digest(data).into()
 }
 
 /// Do a Blake2 64-bit hash and return result.
 pub fn blake2_64(data: &[u8]) -> [u8; 8] {
-	let mut r = [0; 8];
-	blake2_64_into(data, &mut r);
-	r
+	blake2::Blake2b::<U8>::digest(data).into()
 }
 
 /// Do a XX 64-bit hash and place result in `dest`.
@@ -128,21 +102,15 @@ pub fn twox_256(data: &[u8]) -> [u8; 32] {
 
 /// Do a keccak 256-bit hash and return result.
 pub fn keccak_256(data: &[u8]) -> [u8; 32] {
-	let mut output = [0u8; 32];
-	output.copy_from_slice(sha3::Keccak256::digest(data).as_slice());
-	output
+	sha3::Keccak256::digest(data).into()
 }
 
 /// Do a keccak 512-bit hash and return result.
 pub fn keccak_512(data: &[u8]) -> [u8; 64] {
-	let mut output = [0u8; 64];
-	output.copy_from_slice(sha3::Keccak512::digest(data).as_slice());
-	output
+	sha3::Keccak512::digest(data).into()
 }
 
 /// Do a sha2 256-bit hash and return result.
 pub fn sha2_256(data: &[u8]) -> [u8; 32] {
-	let mut output = [0u8; 32];
-	output.copy_from_slice(sha2::Sha256::digest(data).as_slice());
-	output
+	sha2::Sha256::digest(data).into()
 }