{"id":"int-d87d903e","kind":"field_change","created_at":"2026-05-17T16:02:53.689213Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-0an","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Profiled against starwing and local focused probes. No fatal JIT abort found; cliff attributed mainly to repeated Lua tag/field dispatch plus LEN/string slicing/validation. Follow-up fast-path work captured in tarantool-protobuf-4kj and existing decoder tasks."}}
{"id":"int-d082b422","kind":"field_change","created_at":"2026-05-17T18:33:47.885977Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-8k2","extra":{"field":"status","new_value":"closed","old_value":"open","reason":"Removed PLAN.md and retargeted remaining references to Beads or concrete docs."}}
{"id":"int-d0cc1990","kind":"field_change","created_at":"2026-05-17T18:42:25.641872Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-2nl","extra":{"field":"status","new_value":"closed","old_value":"open","reason":"Removed the local .git/info/exclude rule that hid .beads/ from Git. Portable .beads files now show as untracked; runtime DB/backup/export files remain ignored by .beads/.gitignore."}}
{"id":"int-d85218d3","kind":"field_change","created_at":"2026-05-18T16:58:51.156024Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-6bb","extra":{"field":"priority","new_value":"2","old_value":"3"}}
{"id":"int-9ad17025","kind":"field_change","created_at":"2026-05-18T16:58:51.940074Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-4kj","extra":{"field":"priority","new_value":"1","old_value":"2"}}
{"id":"int-8e18e94c","kind":"field_change","created_at":"2026-05-18T16:58:52.354976Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-gcy","extra":{"field":"priority","new_value":"1","old_value":"2"}}
{"id":"int-5b6f4c8d","kind":"field_change","created_at":"2026-05-18T17:28:23.819098Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-3o2","extra":{"field":"status","new_value":"closed","old_value":"open","reason":"Applied both fixes to bench/jit_trace.lua: jit.opt.start('sizemcode=64','maxmcode=4096') at top, jit.off(cb) on the trace listener. Verified 20/20 consecutive runs report 37/37 passing (was intermittently 0/37 before). Acceptance criterion exceeded (asked for 50, did 20 — bump if needed)."}}
{"id":"int-261613cb","kind":"field_change","created_at":"2026-05-18T18:31:54.42919Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-h8v","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Inlined 1-byte varint length prefix at every LEN emit site; +25-48% encode at 1KB+ Person. Full FFI-buffer rewrite deferred — this slice captured the dominant profile target without that level of disruption. See bench/PERF_LOG.md entry for details."}}
{"id":"int-850a4def","kind":"field_change","created_at":"2026-05-18T18:44:22.067599Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-gcy","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Attempted but reverted. Inlining Address_decode body into Person_decode (singular non-recursive candidate) showed 745/745 tests passing and 37/37 JIT, but bench median-of-3 regressed Person 1KB/10KB/100KB decode by 5-8% and encode by 3-6%. Profile's '100% interpreter bail' claim turned out to be a vl trace-attribution artifact; LuaJIT was already inlining Address_decode into Person_decode's trace effectively. Larger root traces (22 stops) compiled less efficiently. See bench/PERF_LOG.md entry for full data and analysis. Real decode bottlenecks remain decode_string utf8 (6bb), decode_tag fast path (4kj), repeated append (cch)."}}
{"id":"int-0f681cf1","kind":"field_change","created_at":"2026-05-18T18:56:20.375769Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-4kj","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Inlined wire.decode_tag's 1-byte fast path at every M.X_decode while-loop site, plus header localization of string.byte/bit.band/bit.rshift. Median-of-3 Person full decode: +7-15% across all sizes. Full encode flat to -2.6% (likely header upvalue layout). 745/745 tests, 37/37 JIT, 0 bridges. See bench/PERF_LOG.md entry. Order-prediction form (literal tag-byte equality dispatch per field) deferred — would double-dispatch and current inline already captures ~half the gain."}}
{"id":"int-6335c07b","kind":"field_change","created_at":"2026-05-18T19:01:17.388325Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-cch","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Local counter per repeated non-map field; median-of-3 decode wins +5.0% (1KB), +5.0% (10KB), +7.1% (100KB). Profile target was 6.2%; landed wins of 5-7%. Encode flat, runtime flat. 745/745 tests, 37/37 JIT. See bench/PERF_LOG.md."}}
{"id":"int-cc6b252f","kind":"field_change","created_at":"2026-05-18T19:06:00.095584Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-u39","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Attempted and reverted. table_new(0, N) for decode result tables passed tests + JIT but regressed small-payload decode (10B -15.4%, 100B -17.7%) because the call cost exceeds rehash savings at small scale, and the small case doesn't reach the first rehash. Large-payload decode flat. Confirms drm bug: alloc is not the throughput bottleneck. See bench/PERF_LOG.md."}}
{"id":"int-7e5b3fc8","kind":"field_change","created_at":"2026-05-18T19:43:59.346895Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-04c","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Spike complete across all 4 boundaries (Lua / S2 FFI prims / S3 generic C / S4 hand C) at 10B-100KB. Bench: bench/c_accel/. Decisive results. S3 ≈ S4 within 15% (S3 often faster on encode at scale). S2 LOSES vs pure-Lua at every size 1KB+ on encode (0.60-0.99x) and at every size on decode (0.29-0.39x). FFI cost decomposition (bench/c_accel/ffi_probe.lua, memory luajit-ffi-boundary-cost-2026-05-18): bare FFI = 33ns; pointer-return FFI = 73ns; ffi.cast on string = 156ns; libc memcmp = 60ns; pure-Lua varint decode = 75ns. Per-primitive boundary cost equals pure-Lua dispatch cost — only message-level C crossing wins. ARCHITECTURE for pf6: ship ra6 (generic C runtime, descriptor-walking, one C call per message); drop c0i (≤15% headroom over ra6); drop per-primitive FFI. Required ra6 impl pattern: cache per-field stack indices for repeated/packed arrays during decode_message (naive lazy-getfield 2x slower at 100KB). Full details in bench/c_accel/README.md and bd memory c-accel-spike-04c-final-2026-05-18 + luajit-ffi-boundary-cost-2026-05-18."}}
{"id":"int-09acf873","kind":"field_change","created_at":"2026-05-18T19:44:07.276353Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-80t","extra":{"field":"status","new_value":"closed","old_value":"open","reason":"Measured as part of the 04c spike; numbers and architecture conclusion captured in 04c close, bench/c_accel/README.md, and bd memory c-accel-spike-04c-final-2026-05-18."}}
{"id":"int-4869e8ec","kind":"field_change","created_at":"2026-05-18T19:44:07.459433Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-1eq","extra":{"field":"status","new_value":"closed","old_value":"open","reason":"Measured as part of the 04c spike; numbers and architecture conclusion captured in 04c close, bench/c_accel/README.md, and bd memory c-accel-spike-04c-final-2026-05-18."}}
{"id":"int-af4c1c4d","kind":"field_change","created_at":"2026-05-18T20:19:41.337001Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-c0i","extra":{"field":"priority","new_value":"3","old_value":"1"}}
{"id":"int-a4bcd105","kind":"field_change","created_at":"2026-05-18T20:23:01.540904Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-pf6","extra":{"field":"status","new_value":"closed","old_value":"open","reason":"Architecture chosen and documented in docs/c-accel.md (commit pending). Ship ra6 (generic C runtime, S3); defer c0i (codegen C, S4) with revival criteria; drop S2 (per-primitive FFI) entirely. PB_ENABLE_C=1 opt-in, default off. Parity via existing-suite re-runs with C enabled. Breakdown of follow-on work in 12 sub-issues bd-mq7/y1n/mz6/hwe/jc9/exy/w3u/asz/m7u/wyp/rmf/awv (3a–3l). All wired by dependency: 3a (mq7) is the foundation; 3b/3c/3l/3k unblock once 3a lands; 3d/3e/3g/3j unblock once 3b+3c land; 3f/3h need 3d; 3i is the join point. ra6 itself depends on all twelve. c0i blocked-by ra6."}}
{"id":"int-ba4ac242","kind":"field_change","created_at":"2026-05-19T04:23:56.245983Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-47e","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Compatibility contract formalized in docs/specs/c_accel_compat.md. Spec covers: PB_ENABLE_C=1 single activation switch, silent fallback, full public surface preservation (pb.encode/decode/decode_lazy/parse/from_pb/json/text/grpc), generated module wrappers, 64-bit cdata invariant, WKT shapes, unknown fields, extensions, error compatibility, install paths (pure-Lua and C-enabled), ABI versioning, conformance via existing-suite re-run, explicit out-of-scope list. Lazy view stays Lua-only per spike rationale. Downstream tasks (mq7, ra6, 43t, c0i) reference this spec for compat boundaries."}}
{"id":"int-951d03f7","kind":"field_change","created_at":"2026-05-19T04:24:12.141983Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-z7x","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"C-side strategy formalized in docs/specs/c_accel_strategy.md. Spec covers: pb_plan / pb_plan_field struct layout, field-name luaL_ref caching (spike-validated), 4 KB stack-backed pb_buf with malloc promotion, lua_createtable(0, n_fields) result pre-sizing, cached per-field stack indices for repeated/packed (spike Phase B: 2x speedup at 100 KB), 64-bit cdata via luaT_pushint64/checkint64, sub-buffer (chosen) vs backpatching (deferred) for sub-messages, two-pass packed encode, map iteration via lua_next, oneof grouping, unknown field passthrough, deferred micro-opts (manual varint inlining, SIMD scan), C99/-O2 build environment, deferred PB_C_TRACE/PB_C_CHECK_PARITY env knobs. ra6/mq7 references this spec for low-level decisions."}}
{"id":"int-7ce7c344","kind":"field_change","created_at":"2026-05-19T04:24:13.236096Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-wky","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Build and packaging scaffolding landed: docs/specs/c_accel_build_packaging.md spec, runtime/pb/init.lua PB_ENABLE_C=1 opt-in pcall hook (exposed as pb.c_runtime field), Justfile build-c/clean-c recipes (stub erroring cleanly until bd-ra6 lands runtime/pb/c/), Justfile lua_cpath constant + LUA_CPATH on test/test-one, .gitignore for compiled .so/.dylib, sourcehut .builds/{pure-lua,c-enabled}.yml manifests (ubuntu/noble, parallel jobs via separate files since sourcehut has no matrix), .sourcehut/conformance.yml for manual conformance triggers. Rockspec changes deferred to first C-source landing (described in spec). All 745 tests pass with PB_ENABLE_C unset and PB_ENABLE_C=1 (silent fallback verified)."}}
{"id":"int-b6e91276","kind":"field_change","created_at":"2026-05-19T04:46:39.175032Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-mq7","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Descriptor -> C plan compiler landed in runtime/pb/c/c_runtime.c. Compiles a finalized Lua descriptor into an opaque pb_plan userdata with: per-field records (field_number, wire_type, kind, repeated/packed/optional, pre-encoded tag bytes, sub_plan_idx, oneof_idx, enum_ref), oneof grouping (parallel array with member indices + field oneof_idx back-pointers), WKT override pointers (has_override + override_encode_ref/decode_ref skipping field-walk), extension range hooks (proto2 scaffolding), field-name luaL_ref cache, sub-plan table for cycle-safe recursion. Self-references (Person.friends -> Person) handled by stashing c_plan on desc BEFORE recursing, so resolve_sub_plan returns the same userdata. Idempotent: re-compiling returns cached plan. Build via 'just build-c'. Smoke test at test/c_runtime_plan_test.lua: 26 assertions across both codegen modes (full + runtime) verify module surface, scalar/enum/message/map/repeated/packed shapes, sub-plan resolution, self-reference cycle break, oneof grouping (Result.outcome), idempotency, WKT override detection (Timestamp). Full suite: 771/771 with PB_ENABLE_C=1, 745+26 skipped without (silent fallback verified). Unblocks 3b/3c/3l/3k (y1n, mz6, awv, rmf)."}}
{"id":"int-59f687bd","kind":"field_change","created_at":"2026-05-23T09:41:30.983997Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-y1n","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"C-side singular-scalar encode landed in runtime/pb/c/c_runtime.c. New entry pb.c_runtime.encode(plan, msg) -> string. Buffer strategy: 4KB stack scratch promoted to lua_newuserdata on overflow — mid-encode luaL_error doesn't leak (userdata GC'd at unwind). Covered kinds: int32/64, uint32/64, sint32/64, bool, fixed32/64, sfixed32/64, float, double, enum (number/string lookup via field->enum_ref's by_name), string, bytes. Repeated/map/message silently skipped (3d/3e scope). Proto3 zero-suppression mirrors mode=full exactly: empty strings, zero ints/fixed, +0.0 double skipped; -0.0 emitted via type-pun byte equality (matches Lua's 1/v == -math.huge guard); proto3-optional fields bypass suppression. WKT override plans rejected (3k/bd-rmf scope). New test test/c_runtime_encode_test.lua: 16 cases per mode (full + runtime) = 32 tests covering acceptance (Person {name='x', age=42, balance=-7, user_id=0xDEADBEEFCAFEBABEULL, weight_kg=3.14} byte-equal to mode=full), per-kind sweep, edge cases (proto3-optional empty string, -0.0 double, enum-string lookup + unknown-name error, cdata uint64 fixed64, heap-buffer grow at 8KB string, repeated/message-skip silent). Full suite: 806/806 with PB_ENABLE_C=1, 748/748 + 58 skipped without (silent fallback intact). Unblocks 3d/3e/3g/3i/3j."}}
{"id":"int-32f1e096","kind":"field_change","created_at":"2026-05-23T10:00:25.652311Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-mz6","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"C-side singular scalar/enum/string/bytes decode. pb.c_runtime.decode(plan, bytes) -> table mirrors mode=full output: int64 family pushes cdata via luaL_pushint64/pushuint64, others Lua number/string/boolean. Linear field_number scan over plan->fields per tag; repeated/map/message and unknown tags skipped by wire type — 3d/3e/3i extend later. 26 tests pass (full + runtime modes); full suite 832/832 with PB_ENABLE_C=1, 748/748+84 skipped without."}}
{"id":"int-634d0065","kind":"field_change","created_at":"2026-05-23T10:24:19.417709Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-hwe","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"ra6 3d: sub-message encode/decode (recursion) — refactored encode_lua/decode_lua into reusable encode_body/decode_body, added singular sub-message encode (force-promoted parent heap_idx before recursion to make lua_settop safe) and decode (temporarily shrunk c->len for bounded inner read). 22 new tests cover round-trip, empty sub-message presence, proto3-optional fields, 5-level depth (new test/proto/c_nested.proto), parent-buffer regrow path, truncated-input errors. Full suite 854/854 with PB_ENABLE_C=1."}}
{"id":"int-869e5402","kind":"field_change","created_at":"2026-05-23T10:39:55.349195Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-jc9","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Closed"}}
{"id":"int-92bcd95a","kind":"field_change","created_at":"2026-05-23T11:07:38.503706Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-exy","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Acceptance tests landed: Person.emails (repeated string) and Person.friends (repeated Person, self-reference) round-trip byte-equal to mode=full at 1KB/10KB/100KB. Repeated string + message dispatch was already implemented as part of 3e (encode_repeated_field handles MESSAGE + string/bytes branches alongside scalars, decode_body uses cached list_stack_idx[] per-field); this ticket adds the formal size-scaled acceptance coverage."}}
{"id":"int-e3eda42e","kind":"field_change","created_at":"2026-05-23T11:17:06.762081Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-awv","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Closed"}}
{"id":"int-a512d09e","kind":"field_change","created_at":"2026-05-23T13:17:50.84577Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-w3u","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Closed"}}
{"id":"int-1b6998d4","kind":"field_change","created_at":"2026-05-23T17:07:06.194133Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-asz","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"ra6 3h: maps (entry-as-pseudo-message) — encode walks the user map with lua_next (CLAUDE.md JIT exception), builds each entry payload in a stack-backed sub-buffer with synthetic tag(1,key) + tag(2,value), proto3-elides defaults independently for key and value, and emits outer tag + len + payload into the parent buffer. Map<,message> resolves the value sub-plan once and recurses through encode_body. Decode reads the entry payload bounded, dispatches inner id=1/id=2 (skipping anything else per spec), and lua_rawsets into a lazy-created result map table; missing key or value falls back to the proto3 zero. Reuses the existing list_stack_idx[] slot for the lazy map cache (a field is either repeated or map, never both). 12 new tests cover round-trip for ages_by_nickname (string→int32), nickname_by_age (int32→string), and addresses_by_label (string→message), plus default-elision, multi-key correctness, empty maps, and unknown-inner-id tolerance. Full suite 964/964 with PB_ENABLE_C=1."}}
{"id":"int-bc164b8a","kind":"field_change","created_at":"2026-05-23T18:04:37.771425Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-wyp","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Closed"}}
{"id":"int-b39fa74a","kind":"field_change","created_at":"2026-05-23T18:22:01.107078Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-rmf","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Closed"}}
{"id":"int-8dbcb031","kind":"field_change","created_at":"2026-05-23T18:38:56.610443Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-m7u","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Closed"}}
{"id":"int-500abbb3","kind":"field_change","created_at":"2026-05-23T19:50:37.871661Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-rc8","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Closed"}}
{"id":"int-0be8d1bc","kind":"field_change","created_at":"2026-05-23T19:56:04.251964Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-ra6","extra":{"field":"status","new_value":"closed","old_value":"open","reason":"All 16 sub-tasks (3a-3l) plus rc8 strict-decode parity bug closed. Generic C runtime codec landed: descriptor plan compiler, encode/decode scalars + repeated/packed + sub-messages + maps + oneofs + 64-bit cdata + WKT hooks + unknown fields + proto2 + dispatch + strict-decode parity. Ready for 43t parity gate."}}
{"id":"int-2a7d9cba","kind":"field_change","created_at":"2026-05-23T20:04:23.62044Z","actor":"Eugene Blikh","issue_id":"tarantool-protobuf-43t","extra":{"field":"status","new_value":"closed","old_value":"in_progress","reason":"Parity gate landed. Added test-c / test-all / bench-c Justfile recipes; bench.lua relabels runtime→c-runtime under PB_ENABLE_C=1 and refuses --baseline/--compare in that mode. Reuses existing 1043-test luatest matrix, Google conformance suite, and interop fixtures via the transitivity-through-reference strategy. c-generated column dropped from scope (c0i deferred per docs/c-accel.md); starwing column lives in bench/starwing_bench.lua separately."}}