Speed up deserialization of secp256k1 objects significantly

Cargo.toml

@@ -22,3 +22,8 @@ panic = "abort"
 opt-level = 3
 lto = true
 panic = "abort"
+
+[profile.bench]
+opt-level = 3
+codegen-units = 1
+lto = true

lightning/src/ln/onion_utils.rs

@@ -11,7 +11,6 @@ use ln::{PaymentHash, PaymentSecret};
 use ln::channelmanager::HTLCSource;
 use ln::msgs;
 use routing::router::RouteHop;
-use util::byte_utils;
 use util::chacha20::ChaCha20;
 use util::errors::{self, APIError};
 use util::ser::{Readable, Writeable, LengthCalculatingWriter};
@@ -29,6 +28,7 @@ use bitcoin::secp256k1;
 
 use prelude::*;
 use std::io::Cursor;
+use core::convert::TryInto;
 use core::ops::Deref;
 
 pub(super) struct OnionKeys {
@@ -367,7 +367,7 @@ pub(super) fn process_onion_failure<T: secp256k1::Signing, L: Deref>(secp_ctx: &
 						const NODE: u16 = 0x2000;
 						const UPDATE: u16 = 0x1000;
 
-						let error_code = byte_utils::slice_to_be16(&error_code_slice);
+						let error_code = u16::from_be_bytes(error_code_slice.try_into().expect("len is 2"));
 						error_code_ret = Some(error_code);
 						error_packet_ret = Some(err_packet.failuremsg[2..].to_vec());
 
@@ -394,7 +394,7 @@ pub(super) fn process_onion_failure<T: secp256k1::Signing, L: Deref>(secp_ctx: &
 						}
 						else if error_code & UPDATE == UPDATE {
 							if let Some(update_len_slice) = err_packet.failuremsg.get(debug_field_size+2..debug_field_size+4) {
-								let update_len = byte_utils::slice_to_be16(&update_len_slice) as usize;
+								let update_len = u16::from_be_bytes(update_len_slice.try_into().expect("len is 2")) as usize;
 								if let Some(update_slice) = err_packet.failuremsg.get(debug_field_size + 4..debug_field_size + 4 + update_len) {
 									if let Ok(chan_update) = msgs::ChannelUpdate::read(&mut Cursor::new(&update_slice)) {
 										// if channel_update should NOT have caused the failure:

lightning/src/ln/peer_channel_encryptor.rs

@@ -21,7 +21,6 @@ use bitcoin::secp256k1::ecdh::SharedSecret;
 use bitcoin::secp256k1;
 
 use util::chacha20poly1305rfc::ChaCha20Poly1305RFC;
-use util::byte_utils;
 use bitcoin::hashes::hex::ToHex;
 
 /// Maximum Lightning message data length according to
@@ -141,7 +140,7 @@ impl PeerChannelEncryptor {
 	#[inline]
 	fn encrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], plaintext: &[u8]) {
 		let mut nonce = [0; 12];
-		nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
+		nonce[4..].copy_from_slice(&n.to_le_bytes()[..]);
 
 		let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 		let mut tag = [0; 16];
@@ -152,7 +151,7 @@ impl PeerChannelEncryptor {
 	#[inline]
 	fn decrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], cyphertext: &[u8]) -> Result<(), LightningError> {
 		let mut nonce = [0; 12];
-		nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
+		nonce[4..].copy_from_slice(&n.to_le_bytes()[..]);
 
 		let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 		if !chacha.decrypt(&cyphertext[0..cyphertext.len() - 16], res, &cyphertext[cyphertext.len() - 16..]) {
@@ -406,7 +405,7 @@ impl PeerChannelEncryptor {
 					*sn = 0;
 				}
 
-				Self::encrypt_with_ad(&mut res[0..16+2], *sn, sk, &[0; 0], &byte_utils::be16_to_array(msg.len() as u16));
+				Self::encrypt_with_ad(&mut res[0..16+2], *sn, sk, &[0; 0], &(msg.len() as u16).to_be_bytes());
 				*sn += 1;
 
 				Self::encrypt_with_ad(&mut res[16+2..], *sn, sk, &[0; 0], msg);
@@ -435,7 +434,7 @@ impl PeerChannelEncryptor {
 				let mut res = [0; 2];
 				Self::decrypt_with_ad(&mut res, *rn, rk, &[0; 0], msg)?;
 				*rn += 1;
-				Ok(byte_utils::slice_to_be16(&res))
+				Ok(u16::from_be_bytes(res))
 			},
 			_ => panic!("Tried to decrypt a message prior to noise handshake completion"),
 		}

lightning/src/ln/wire.rs

@@ -350,8 +350,8 @@ impl Encode for msgs::GossipTimestampFilter {
 #[cfg(test)]
 mod tests {
 	use super::*;
-	use util::byte_utils;
 	use prelude::*;
+	use core::convert::TryInto;
 
 	// Big-endian wire encoding of Pong message (type = 19, byteslen = 2).
 	const ENCODED_PONG: [u8; 6] = [0u8, 19u8, 0u8, 2u8, 0u8, 0u8];
@@ -397,7 +397,7 @@ mod tests {
 
 	#[test]
 	fn read_unknown_message() {
-		let buffer = &byte_utils::be16_to_array(::core::u16::MAX);
+		let buffer = &::core::u16::MAX.to_be_bytes();
 		let mut reader = ::std::io::Cursor::new(buffer);
 		let message = read(&mut reader).unwrap();
 		match message {
@@ -414,7 +414,7 @@ mod tests {
 
 		let type_length = ::core::mem::size_of::<u16>();
 		let (type_bytes, payload_bytes) = buffer.split_at(type_length);
-		assert_eq!(byte_utils::slice_to_be16(type_bytes), msgs::Pong::TYPE);
+		assert_eq!(u16::from_be_bytes(type_bytes.try_into().unwrap()), msgs::Pong::TYPE);
 		assert_eq!(payload_bytes, &ENCODED_PONG[type_length..]);
 	}
 

lightning/src/routing/network_graph.rs

@@ -2424,3 +2424,30 @@ mod tests {
 		assert!(result.is_err());
 	}
 }
+
+#[cfg(all(test, feature = "unstable"))]
+mod benches {
+	use super::*;
+
+	use test::Bencher;
+	use std::io::Read;
+
+	#[bench]
+	fn read_network_graph(bench: &mut Bencher) {
+		let mut d = ::routing::router::test_utils::get_route_file().unwrap();
+		let mut v = Vec::new();
+		d.read_to_end(&mut v).unwrap();
+		bench.iter(|| {
+			let _ = NetworkGraph::read(&mut std::io::Cursor::new(&v)).unwrap();
+		});
+	}
+
+	#[bench]
+	fn write_network_graph(bench: &mut Bencher) {
+		let mut d = ::routing::router::test_utils::get_route_file().unwrap();
+		let net_graph = NetworkGraph::read(&mut d).unwrap();
+		bench.iter(|| {
+			let _ = net_graph.encode();
+		});
+	}
+}

lightning/src/routing/router.rs

@@ -3856,44 +3856,21 @@ mod tests {
 		}
 	}
 
-	use std::fs::File;
-	use util::ser::Readable;
-	/// Tries to open a network graph file, or panics with a URL to fetch it.
-	pub(super) fn get_route_file() -> Result<std::fs::File, std::io::Error> {
-		let res = File::open("net_graph-2021-05-27.bin") // By default we're run in RL/lightning
-			.or_else(|_| File::open("lightning/net_graph-2021-05-27.bin")) // We may be run manually in RL/
-			.or_else(|_| { // Fall back to guessing based on the binary location
-				// path is likely something like .../rust-lightning/target/debug/deps/lightning-...
-				let mut path = std::env::current_exe().unwrap();
-				path.pop(); // lightning-...
-				path.pop(); // deps
-				path.pop(); // debug
-				path.pop(); // target
-				path.push("lightning");
-				path.push("net_graph-2021-05-27.bin");
-				eprintln!("{}", path.to_str().unwrap());
-				File::open(path)
-			});
-		#[cfg(require_route_graph_test)]
-		return Ok(res.expect("Didn't have route graph and was configured to require it"));
-		#[cfg(not(require_route_graph_test))]
-		return res;
-	}
-
 	pub(super) fn random_init_seed() -> u64 {
 		// Because the default HashMap in std pulls OS randomness, we can use it as a (bad) RNG.
 		use core::hash::{BuildHasher, Hasher};
 		let seed = std::collections::hash_map::RandomState::new().build_hasher().finish();
 		println!("Using seed of {}", seed);
 		seed
 	}
+	use util::ser::Readable;
 
 	#[test]
 	fn generate_routes() {
-		let mut d = match get_route_file() {
+		let mut d = match super::test_utils::get_route_file() {
 			Ok(f) => f,
-			Err(_) => {
-				eprintln!("Please fetch https://bitcoin.ninja/ldk-net_graph-45d86ead641d-2021-05-27.bin and place it at lightning/net_graph-2021-05-27.bin");
+			Err(e) => {
+				eprintln!("{}", e);
 				return;
 			},
 		};
@@ -3917,10 +3894,10 @@ mod tests {
 
 	#[test]
 	fn generate_routes_mpp() {
-		let mut d = match get_route_file() {
+		let mut d = match super::test_utils::get_route_file() {
 			Ok(f) => f,
-			Err(_) => {
-				eprintln!("Please fetch https://bitcoin.ninja/ldk-net_graph-45d86ead641d-2021-05-27.bin and place it at lightning/net_graph-2021-05-27.bin");
+			Err(e) => {
+				eprintln!("{}", e);
 				return;
 			},
 		};
@@ -3943,12 +3920,38 @@ mod tests {
 	}
 }
 
+#[cfg(test)]
+pub(crate) mod test_utils {
+	use std::fs::File;
+	/// Tries to open a network graph file, or panics with a URL to fetch it.
+	pub(crate) fn get_route_file() -> Result<std::fs::File, &'static str> {
+		let res = File::open("net_graph-2021-05-27.bin") // By default we're run in RL/lightning
+			.or_else(|_| File::open("lightning/net_graph-2021-05-27.bin")) // We may be run manually in RL/
+			.or_else(|_| { // Fall back to guessing based on the binary location
+				// path is likely something like .../rust-lightning/target/debug/deps/lightning-...
+				let mut path = std::env::current_exe().unwrap();
+				path.pop(); // lightning-...
+				path.pop(); // deps
+				path.pop(); // debug
+				path.pop(); // target
+				path.push("lightning");
+				path.push("net_graph-2021-05-27.bin");
+				eprintln!("{}", path.to_str().unwrap());
+				File::open(path)
+			})
+		.map_err(|_| "Please fetch https://bitcoin.ninja/ldk-net_graph-45d86ead641d-2021-05-27.bin and place it at lightning/net_graph-2021-05-27.bin");
+		#[cfg(require_route_graph_test)]
+		return Ok(res.unwrap());
+		#[cfg(not(require_route_graph_test))]
+		return res;
+	}
+}
+
 #[cfg(all(test, feature = "unstable"))]
 mod benches {
 	use super::*;
 	use util::logger::{Logger, Record};
 
-	use prelude::*;
 	use test::Bencher;
 
 	struct DummyLogger {}
@@ -3958,8 +3961,7 @@ mod benches {
 
 	#[bench]
 	fn generate_routes(bench: &mut Bencher) {
-		let mut d = tests::get_route_file()
-			.expect("Please fetch https://bitcoin.ninja/ldk-net_graph-45d86ead641d-2021-05-27.bin and place it at lightning/net_graph-2021-05-27.bin");
+		let mut d = test_utils::get_route_file().unwrap();
 		let graph = NetworkGraph::read(&mut d).unwrap();
 
 		// First, get 100 (source, destination) pairs for which route-getting actually succeeds...
@@ -3990,8 +3992,7 @@ mod benches {
 
 	#[bench]
 	fn generate_mpp_routes(bench: &mut Bencher) {
-		let mut d = tests::get_route_file()
-			.expect("Please fetch https://bitcoin.ninja/ldk-net_graph-45d86ead641d-2021-05-27.bin and place it at lightning/net_graph-2021-05-27.bin");
+		let mut d = test_utils::get_route_file().unwrap();
 		let graph = NetworkGraph::read(&mut d).unwrap();
 
 		// First, get 100 (source, destination) pairs for which route-getting actually succeeds...

lightning/src/util/byte_utils.rs

@@ -7,26 +7,6 @@
 // You may not use this file except in accordance with one or both of these
 // licenses.
 
-#[inline]
-pub fn slice_to_be16(v: &[u8]) -> u16 {
-	((v[0] as u16) << 8*1) |
-	((v[1] as u16) << 8*0)
-}
-#[inline]
-pub fn slice_to_be32(v: &[u8]) -> u32 {
-	((v[0] as u32) << 8*3) |
-	((v[1] as u32) << 8*2) |
-	((v[2] as u32) << 8*1) |
-	((v[3] as u32) << 8*0)
-}
-#[cfg(not(feature = "fuzztarget"))] // Used only by poly1305
-#[inline]
-pub fn slice_to_le32(v: &[u8]) -> u32 {
-	((v[0] as u32) << 8*0) |
-	((v[1] as u32) << 8*1) |
-	((v[2] as u32) << 8*2) |
-	((v[3] as u32) << 8*3)
-}
 #[inline]
 pub fn slice_to_be48(v: &[u8]) -> u64 {
 	((v[0] as u64) << 8*5) |
@@ -64,16 +44,6 @@ pub fn be32_to_array(u: u32) -> [u8; 4] {
 	v[3] = ((u >> 8*0) & 0xff) as u8;
 	v
 }
-#[cfg(not(feature = "fuzztarget"))] // Used only by poly1305
-#[inline]
-pub fn le32_to_array(u: u32) -> [u8; 4] {
-	let mut v = [0; 4];
-	v[0] = ((u >> 8*0) & 0xff) as u8;
-	v[1] = ((u >> 8*1) & 0xff) as u8;
-	v[2] = ((u >> 8*2) & 0xff) as u8;
-	v[3] = ((u >> 8*3) & 0xff) as u8;
-	v
-}
 #[inline]
 pub fn be48_to_array(u: u64) -> [u8; 6] {
 	assert!(u & 0xffff_0000_0000_0000 == 0);
@@ -120,14 +90,10 @@ mod tests {
 
 	#[test]
 	fn test_all() {
-		assert_eq!(slice_to_be16(&[0xde, 0xad]), 0xdead);
-		assert_eq!(slice_to_be32(&[0xde, 0xad, 0xbe, 0xef]), 0xdeadbeef);
-		assert_eq!(slice_to_le32(&[0xef, 0xbe, 0xad, 0xde]), 0xdeadbeef);
 		assert_eq!(slice_to_be48(&[0xde, 0xad, 0xbe, 0xef, 0x1b, 0xad]), 0xdeadbeef1bad);
 		assert_eq!(slice_to_be64(&[0xde, 0xad, 0xbe, 0xef, 0x1b, 0xad, 0x1d, 0xea]), 0xdeadbeef1bad1dea);
 		assert_eq!(be16_to_array(0xdead), [0xde, 0xad]);
 		assert_eq!(be32_to_array(0xdeadbeef), [0xde, 0xad, 0xbe, 0xef]);
-		assert_eq!(le32_to_array(0xdeadbeef), [0xef, 0xbe, 0xad, 0xde]);
 		assert_eq!(be48_to_array(0xdeadbeef1bad), [0xde, 0xad, 0xbe, 0xef, 0x1b, 0xad]);
 		assert_eq!(be64_to_array(0xdeadbeef1bad1dea), [0xde, 0xad, 0xbe, 0xef, 0x1b, 0xad, 0x1d, 0xea]);
 		assert_eq!(le64_to_array(0xdeadbeef1bad1dea), [0xea, 0x1d, 0xad, 0x1b, 0xef, 0xbe, 0xad, 0xde]);