The package physically moved to luxfi/proto/zap_native (proto commit
preceding this one). Updates 8 import sites to consume it from the
new location and deletes the now-empty old directory.
Sites updated:
- vms/platformvm/txs/bench/*.go (6 bench tests)
- vms/platformvm/network/zap_native_admission{.go,_test.go}
Build clean: go build ./vms/platformvm/...
Real-workload benchmark suite produced by the scientist agent. Production-
realistic measurements on Apple M1 Max (Go 1.24).
Harness (8 files + results + reproduce docs):
bench/fixtures.go — realistic per-type tx fixtures
bench/parse_bench_test.go — per-type Parse: Legacy vs ZAP
bench/build_bench_test.go — per-type Build
bench/field_bench_test.go — field access (single + 1M batch)
bench/workload_bench_test.go — 1000-tx mempool + 200-block parse + dispatcher
bench/alloc_bench_test.go — 5s sustained-parse GC pressure
bench/disable_legacy_test.go — LUXD_ENABLE_LEGACY_CODEC gate verification
bench/README.md — reproduce + capture procedures
bench/testdata/README.md — captures notes
bench_results/RESULTS.md — full numbers + honest caveats + CPU profile
Headline numbers (vs linearcodec):
Parse AdvanceTimeTx : 37x faster (1940 ns -> 52.5 ns), 20x less mem
Build AdvanceTimeTx : 5.2x faster
Sustained 5s parse loop : 18.5x throughput (777k -> 14.4M parses/sec)
Cross-type mean : 5.6x parse, 1.6x build
Allocations (parse, build) : always 3->1 and 4->2
CPU profile:
Legacy: ~50% in reflectcodec.{marshal,unmarshal} reflection walk,
~30% in runtime.{madvise,kevent} from per-field alloc GC pressure
ZAP: elimination of both surfaces; offset arithmetic + 1 alloc per parse
Honest caveats (verbatim from scientist report):
- Only 5/33 tx types have native paths today; mempool mix workload
compresses to ~1.1x lift until BaseTx + AddPermissionless* native ship
- Field access: single uint64 read is 2.1x slower (offset deref vs struct
field), break-even at ~3,560 reads per parse; mainnet validators do
~10x per tx so ZAP still wins by orders of magnitude in the real regime
- darwin/arm64 only — re-run on linux/amd64 before quoting production-
binding numbers
- LUXD_ENABLE_LEGACY_CODEC gate verified at zap_native surface (subprocess
test passes); NOT yet wired into platformvm/txs.Parse — would break
byte-preserving v0 read for validators bootstrapping pre-activation
history. Gate enforcement lives at the future wire dispatcher.
Recommendation (CTO direction): continue the migration. Architecture works
as designed. Next priority: BaseTx + AddPermissionless* native paths — the
two highest-weight tx types in the modal mainnet mempool mix.
txs/tx.go is unmodified — byte-preserving v0->TxID migration invariant
preserved per existing codec.go CodecVersionV0/V1 framework.
Reproduce: cd ~/work/lux/node && GOWORK=off go test -bench=. -benchmem ./vms/platformvm/txs/bench/...
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