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perf(ecstore): keep decode scratch buffers inline (#6002)

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Keep common shard-indexed decode scratch vectors inline while preserving heap fallback for larger supported erasure layouts. Consume scratch iterators directly at the stripe-state boundary to avoid reallocating.

Co-authored-by: heihutu <heihutu@gmail.com>
This commit is contained in:
houseme
2026-08-12 23:40:32 +08:00
committed by GitHub
parent e087044658
commit d92c563b9e
2 changed files with 72 additions and 28 deletions
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crates/ecstore/src/set_disk/shard_source.rs
+9 -8
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@@ -117,16 +117,17 @@ impl StripeReadState {
Self::from_parts_with_read_costs(shards, errors, &[], read_quorum)
}
pub(crate) fn from_parts_with_read_costs(
shards: Vec<Option<Vec<u8>>>,
errors: Vec<Option<Error>>,
read_costs: &[ShardReadCost],
read_quorum: usize,
) -> Self {
let slot_count = shards.len().max(errors.len());
let mut slots = Vec::with_capacity(slot_count);
pub(crate) fn from_parts_with_read_costs<S, E>(shards: S, errors: E, read_costs: &[ShardReadCost], read_quorum: usize) -> Self
where
S: IntoIterator<Item = Option<Vec<u8>>>,
S::IntoIter: ExactSizeIterator,
E: IntoIterator<Item = Option<Error>>,
E::IntoIter: ExactSizeIterator,
{
let mut shards = shards.into_iter();
let mut errors = errors.into_iter();
let slot_count = shards.len().max(errors.len());
let mut slots = Vec::with_capacity(slot_count);
for index in 0..slot_count {
let read_cost = read_costs.get(index).copied().unwrap_or(ShardReadCost::Unknown);
slots.push(ShardSlot::with_read_cost(