The bulk-write/read SDK methods (read_bulk, write_bulk, write2_bulk,
write_secured_bulk, write_secured2_bulk) and the matching clap
subcommands (ReadBulk, WriteBulk, Write2Bulk, WriteSecuredBulk,
WriteSecured2Bulk) were already on HEAD from a prior session — they
were the only bulk family that HEAD shipped before the .NET / Go /
Python / Java parallel ports. The one missing piece from the divergent
branch (commit f220908) was the BenchReadBulk benchmark harness.
mxgw-cli/src/main.rs adds:
- BenchReadBulk clap variant with flags --client-name,
--duration-seconds, --warmup-seconds, --bulk-size, --tag-start,
--tag-prefix, --tag-attribute, --timeout-ms, --json — defaults match
the .NET and Go benches.
- run_bench_read_bulk(): open-session → register → subscribe_bulk on
the synthesized TestMachine_NNN.TestChangingInt tags to populate the
worker value cache → warmup → steady-state loop with per-call
std::time::Instant capture → unsubscribe → close-session.
- BenchStats + LatencySummary structs and a percentile()
helper (nearest-rank with linear interpolation, matching the Go and
.NET implementations) so the cross-language JSON output is byte-for-
byte comparable. JSON schema: language / command / endpoint /
clientName / bulkSize / durationSeconds / warmupSeconds / durationMs
/ tags / totalCalls / successfulCalls / failedCalls /
totalReadResults / cachedReadResults / callsPerSecond /
latencyMs:{p50,p95,p99,max,mean}. scripts/bench-read-bulk.ps1 will
pick up the Rust line on its next run.
session.rs picks up minor tightening tied to the bulk SDK methods that
were already in the file (per-entry validation paths, BulkReplyKind
dispatch coverage) — no public-surface change.
Verification: cargo build --workspace clean (the 2 pre-existing
options.rs missing_docs warnings remain — out of scope); cargo test
--workspace 34/34 passing; cargo clippy --workspace --all-targets has
only the 3 pre-existing tolerated warnings (enum_variant_names on
BulkReplyKind, missing_docs on options.rs, clone_on_copy on
galaxy.rs:282). Manual smoke against live gateway on localhost:5120:
read-bulk on two TestMachine tags returned wasCached=true,
wasSuccessful=true; bench-read-bulk --duration-seconds 2
--warmup-seconds 1 --bulk-size 2 --json ran 363 calls / 181.35 calls
per second / p50=5.3 ms / p99=7.8 ms / 726 of 726 cached reads, all
emitting valid JSON in the shared bench schema.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Joseph Doherty
325106920f