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create some vectors with initial capacities (#3701)

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Signed-off-by: Benjamin Coenen <benjamin.coenen@hotmail.com>
This commit is contained in:
Coenen Benjamin
2019-09-27 11:46:53 +02:00
committed by Bastian Köcher
parent 62be947877
commit 53a43e92aa
3 changed files with 17 additions and 19 deletions
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substrate/core/client/db/src/lib.rs
+13 -15
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@@ -1048,24 +1048,22 @@ impl<Block: BlockT<Hash=H256>> Backend<Block> {
operation.apply_aux(&mut transaction);
let mut meta_updates = Vec::new();
let mut meta_updates = Vec::with_capacity(operation.finalized_blocks.len());
let mut last_finalized_hash = self.blockchain.meta.read().finalized_hash;
if !operation.finalized_blocks.is_empty() {
for (block, justification) in operation.finalized_blocks {
let block_hash = self.blockchain.expect_block_hash_from_id(&block)?;
let block_header = self.blockchain.expect_header(BlockId::Hash(block_hash))?;
for (block, justification) in operation.finalized_blocks {
let block_hash = self.blockchain.expect_block_hash_from_id(&block)?;
let block_header = self.blockchain.expect_header(BlockId::Hash(block_hash))?;
meta_updates.push(self.finalize_block_with_transaction(
&mut transaction,
&block_hash,
&block_header,
Some(last_finalized_hash),
justification,
&mut finalization_displaced_leaves,
)?);
last_finalized_hash = block_hash;
}
meta_updates.push(self.finalize_block_with_transaction(
&mut transaction,
&block_hash,
&block_header,
Some(last_finalized_hash),
justification,
&mut finalization_displaced_leaves,
)?);
last_finalized_hash = block_hash;
}
let imported = if let Some(pending_block) = operation.pending_block {