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Don't clone values when calculating storage root (#6108)

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* Don't clone values when calculating storage root

Instead of cloning all the keys and values of the overlay when
calculating the storage root, we pass all the values by reference. This
should probably bring some performance improvements when calculating the
storage root.

* no cow version (#6113)

Co-authored-by: cheme <emericchevalier.pro@gmail.com>
This commit is contained in:
Bastian Köcher
2020-05-23 11:28:34 +02:00
committed by GitHub
parent 40f3c7348e
commit 82a832bc3a
12 changed files with 165 additions and 187 deletions
Download Patch File Download Diff File Expand all files Collapse all files
substrate/primitives/state-machine/src/proving_backend.rs
+13 -19
View File
@@ -17,7 +17,7 @@
//! Proving state machine backend.
use std::sync::Arc;
use std::{sync::Arc, collections::HashMap};
use parking_lot::RwLock;
use codec::{Decode, Codec};
use log::debug;
@@ -26,13 +26,10 @@ use sp_trie::{
MemoryDB, empty_child_trie_root, read_trie_value_with, read_child_trie_value_with,
record_all_keys, StorageProof,
};
pub use sp_trie::Recorder;
pub use sp_trie::trie_types::{Layout, TrieError};
pub use sp_trie::{Recorder, trie_types::{Layout, TrieError}};
use crate::trie_backend::TrieBackend;
use crate::trie_backend_essence::{Ephemeral, TrieBackendEssence, TrieBackendStorage};
use crate::{Error, ExecutionError, Backend};
use std::collections::HashMap;
use crate::DBValue;
use crate::{Error, ExecutionError, Backend, DBValue};
use sp_core::storage::ChildInfo;
/// Patricia trie-based backend specialized in get value proofs.
@@ -260,21 +257,18 @@ impl<'a, S, H> Backend<H> for ProvingBackend<'a, S, H>
self.0.child_keys(child_info, prefix)
}
fn storage_root<I>(&self, delta: I) -> (H::Out, Self::Transaction)
where I: IntoIterator<Item=(Vec<u8>, Option<Vec<u8>>)>
{
fn storage_root<'b>(
&self,
delta: impl Iterator<Item=(&'b [u8], Option<&'b [u8]>)>,
) -> (H::Out, Self::Transaction) where H::Out: Ord {
self.0.storage_root(delta)
}
fn child_storage_root<I>(
fn child_storage_root<'b>(
&self,
child_info: &ChildInfo,
delta: I,
) -> (H::Out, bool, Self::Transaction)
where
I: IntoIterator<Item=(Vec<u8>, Option<Vec<u8>>)>,
H::Out: Ord
{
delta: impl Iterator<Item=(&'b [u8], Option<&'b [u8]>)>,
) -> (H::Out, bool, Self::Transaction) where H::Out: Ord {
self.0.child_storage_root(child_info, delta)
}
@@ -393,9 +387,9 @@ mod tests {
let in_memory = InMemoryBackend::<BlakeTwo256>::default();
let mut in_memory = in_memory.update(contents);
let child_storage_keys = vec![child_info_1.to_owned(), child_info_2.to_owned()];
let in_memory_root = in_memory.full_storage_root::<_, Vec<_>, _>(
::std::iter::empty(),
child_storage_keys.into_iter().map(|k|(k.to_owned(), Vec::new()))
let in_memory_root = in_memory.full_storage_root(
std::iter::empty(),
child_storage_keys.iter().map(|k|(k, std::iter::empty()))
).0;
(0..64).for_each(|i| assert_eq!(
in_memory.storage(&[i]).unwrap().unwrap(),