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removes hash-map lookups when sorting vote-account keys (#30878)

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behzad nouri 2023-03-23 22:29:35 +00:00 committed by GitHub
parent 653083806f
commit a36e8f559c
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1 changed files with 8 additions and 15 deletions
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23
core/src/verified_vote_packets.rs
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@ -1,5 +1,6 @@
use {
crate::{cluster_info_vote_listener::VerifiedLabelVotePacketsReceiver, result::Result},
itertools::Itertools,
solana_perf::packet::PacketBatch,
solana_runtime::{
bank::Bank,
@ -59,22 +60,14 @@ impl<'a> ValidatorGossipVotesIterator<'a> {
// TODO: my_leader_bank.vote_accounts() may not contain zero-staked validators
// in this epoch, but those validators may have stake warming up in the next epoch
let mut vote_account_keys: Vec<Pubkey> =
my_leader_bank.vote_accounts().keys().copied().collect();
// Sort by stake weight so heavier validators' votes are sent first
vote_account_keys.sort_by(|a, b| {
my_leader_bank
.vote_accounts()
.get(b)
.map_or(0, |(stake, _)| *stake)
.cmp(
&my_leader_bank
.vote_accounts()
.get(a)
.map_or(0, |(stake, _)| *stake),
)
});
let vote_account_keys: Vec<Pubkey> = my_leader_bank
.vote_accounts()
.iter()
.map(|(pubkey, &(stake, _))| (pubkey, stake))
.sorted_unstable_by_key(|&(_, stake)| std::cmp::Reverse(stake))
.map(|(&pubkey, _)| pubkey)
.collect();
Self {
my_leader_bank,
slot_hashes,