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distribution: speed improvements

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This commit is contained in:
nym21
2026-03-08 21:49:14 +01:00
parent d55377e169
commit bb2458c765
15 changed files with 387 additions and 251 deletions
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28
crates/brk_computer/src/inputs/spent/compute.rs
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@@ -42,10 +42,14 @@ impl Vecs {
let value_reader = indexer.vecs.outputs.value.reader();
let actual_total = target - min;
let mut entries: Vec<Entry> = Vec::with_capacity(actual_total.min(BATCH_SIZE));
// Pre-allocate output buffers for scatter-write pattern
let mut out_txoutindex: Vec<TxOutIndex> = Vec::new();
let mut out_value: Vec<Sats> = Vec::new();
let mut batch_start = min;
while batch_start < target {
let batch_end = (batch_start + BATCH_SIZE).min(target);
let batch_len = batch_end - batch_start;
entries.clear();
let mut j = 0usize;
@@ -55,7 +59,7 @@ impl Vecs {
.outpoint
.for_each_range_at(batch_start, batch_end, |outpoint| {
entries.push(Entry {
txinindex: TxInIndex::from(batch_start + j),
original_idx: j,
txindex: outpoint.txindex(),
vout: outpoint.vout(),
txoutindex: TxOutIndex::COINBASE,
@@ -64,7 +68,7 @@ impl Vecs {
j += 1;
});
// Coinbase entries (txindex MAX) sorted to end
// Sort 1: by txindex (group by transaction for sequential first_txoutindex reads)
entries.sort_unstable_by_key(|e| e.txindex);
for entry in &mut entries {
if entry.txindex.is_coinbase() {
@@ -74,6 +78,7 @@ impl Vecs {
first_txoutindex_reader.get(entry.txindex.to_usize()) + entry.vout;
}
// Sort 2: by txoutindex (sequential value reads)
entries.sort_unstable_by_key(|e| e.txoutindex);
for entry in &mut entries {
if entry.txoutindex.is_coinbase() {
@@ -82,11 +87,22 @@ impl Vecs {
entry.value = value_reader.get(entry.txoutindex.to_usize());
}
entries.sort_unstable_by_key(|e| e.txinindex);
// Scatter-write to output buffers using original_idx (avoids Sort 3)
out_txoutindex.clear();
out_txoutindex.resize(batch_len, TxOutIndex::COINBASE);
out_value.clear();
out_value.resize(batch_len, Sats::MAX);
for entry in &entries {
out_txoutindex[entry.original_idx] = entry.txoutindex;
out_value[entry.original_idx] = entry.value;
}
for i in 0..batch_len {
let txinindex = TxInIndex::from(batch_start + i);
self.txoutindex
.truncate_push(entry.txinindex, entry.txoutindex)?;
self.value.truncate_push(entry.txinindex, entry.value)?;
.truncate_push(txinindex, out_txoutindex[i])?;
self.value.truncate_push(txinindex, out_value[i])?;
}
if batch_end < target {
@@ -106,7 +122,7 @@ impl Vecs {
}
struct Entry {
txinindex: TxInIndex,
original_idx: usize,
txindex: TxIndex,
vout: Vout,
txoutindex: TxOutIndex,