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https://github.com/ethereum/go-ethereum.git
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8a5e777fde
Replace the BinaryNode interface (which uses Go interface pointers that the GC must scan) with NodeRef uint32 indices into typed arena pools. NodeRef packs a 2-bit kind tag and 30-bit pool index into a single uint32, making it invisible to the garbage collector. NodeStore manages chunked typed pools per node kind: - InternalNode pool: ZERO Go pointers (children are NodeRef, hash is [32]byte) → allocated in noscan spans, GC skips entirely - HashedNode pool: ZERO Go pointers → noscan spans - StemNode pool: ONE pointer per node (valueData []byte) → minimal GC For a trie with 25K InternalNodes, this reduces GC-scanned pointer-words from ~125K to ~10K (85% reduction). CPU profiling showed 44% of time in GC; this refactor directly addresses that bottleneck. Serialization format is unchanged — the on-disk representation is fully compatible. All existing tests pass.
47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
// Copyright 2026 go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package bintrie
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import (
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"crypto/sha256"
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"hash"
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"sync"
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)
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var sha256Pool = sync.Pool{
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New: func() any {
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return sha256.New()
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},
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}
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func newSha256() hash.Hash {
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h := sha256Pool.Get().(hash.Hash)
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h.Reset()
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return h
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}
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func returnSha256(h hash.Hash) {
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sha256Pool.Put(h)
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}
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// sha256Sum256 computes a sha256 digest and returns it as a common.Hash.
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func sha256Sum256(data []byte) [32]byte {
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return sha256.Sum256(data)
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}
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// parallelHashDepth controls below which depth hashing is parallelised.
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const parallelHashDepth = 4
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