perf: shed resident per-chat and per-entry memory, trim per-message copies by jlucaso1 · Pull Request #1389 · oxidezap/whatsapp-rust

jlucaso1 · 2026-09-02T15:33:33Z

Summary

Follow-up to #1353, #1354 and #1388, same rules: every change keeps output and public API byte-identical (the two additions are SenderKeyMessage: TryFrom<Bytes> and group_decrypt_shared), and each one was verified against the surrounding code rather than the pattern alone. This round targets two things the earlier passes did not reach: memory a connected client keeps per chat and per cache entry for hours, and the copies still paid per group message.

metric	main	this PR	delta
bin size (stripped)	10.42 MiB	10.35 MiB	−73.56 KiB (−0.69%)
`.text whatsapp_rust`	1.97 MiB	1.90 MiB	−72.85 KiB (−3.61%)
llvm-lines whatsapp-rust lib	820,848	789,935	−30,913 (−3.77%)

Resident memory

Chat lane workers exit when idle (src/handlers/message.rs). A lane's worker awaits handle_incoming_message_scoped inline, so its spawned task holds that future's whole state machine — measured at 9,296 B in a debug probe — for as long as the worker lives, message or no message. Kept alive for the connection, that is one such future per chat that ever spoke, bounded only by chat_lanes_capacity (5 000): a client in a few thousand groups parked tens of MiB in idle workers. A worker now closes its queue after 60 s of silence and exits; the next message for the chat is told Closed and replaces the lane. Both locks belong to the chat rather than the lane and are inherited by the replacement: enqueue_lock, so every enqueue for the chat takes one total order whichever lane generation the handler fetched (the swap itself runs under it), and worker_running, which the successor worker takes before its first message so a draining tail can never interleave with it. The idle timer is armed only when the queue is empty, so a busy chat pays nothing per message. Two tests under Tokio's paused clock pin the exit, the respawn and both lock hand-offs; a lane that keeps receiving never exits. CodSpeed: bench_chat_lane_create −47% memory, −60% time at 256 and 4 096 lanes.

PortableCache stores each key once (src/portable_cache.rs). The FIFO index was BTreeMap<u64, K>: every entry carried its key twice, and for a String, Jid or SenderMessageId key that second copy was a second heap allocation held for the entry's whole life, across all ~20 caches the client keeps. The map is now a hashbrown::HashTable keyed by the hash stored in the slot, and the index is seq -> hash; eviction and targeted removal find the slot by (hash, seq). A cache with no capacity bound — the four unbounded LID↔PN maps — keeps no FIFO index at all, since nothing could ever pop it. an_insert_stores_the_key_once_and_never_clones_it (a clone-counting key) and an_unbounded_cache_keeps_no_fifo_index pin both. The BTreeMap<u64, u64> is also one instantiation shared by every cache instead of one per key type, which is where most of the 73 KiB of .text comes from.

GroupInfo::participants shrinks after every membership change (wacore/src/client/context.rs). push doubles; a 1 025-member group held a 2 048-slot buffer, and retain never released it.

Per message

SenderKeyMessage holds Bytes (wacore/libsignal/src/protocol/protocol.rs). It was the one envelope still parsed with Box::from(value) — one allocation and a full memcpy of the skmsg per group message — while SignalMessage and PreKeySignalMessage already shared their frame slice. group_decrypt_shared takes the EncPayload's Bytes (a refcount bump into the frame buffer); group_decrypt(&[u8]) forwards to it, and into_serialized recovers the allocation on the send path as before. The borrowed form validates before it copies. CodSpeed: bench_group_decrypt_message 1,584 B → 592 B, bench_group_in_order_decrypt_with_backlog 1,519 B → 511 B.
group_decrypt writes into an exact-size plaintext (group_cipher.rs). The thread-local scratch handed its buffer away on every message and replaced it with a fresh 1 KiB Vec — so it allocated per message anyway — and the handed-away buffer carried whatever capacity an earlier large message had grown it to. That Vec becomes the Bytes the message is dispatched and committed as, so the slack stayed pinned for the message's lifetime. CBC output is never longer than its input, so one reservation of ciphertext.len() covers it; DECRYPTION_BUFFER and take_buffer are gone.
The LID↔PN relearn check runs before the mutation mutex (src/client/lid_pn.rs). record_lid_pn_in_memory runs for every message whose sender carries a sender_alt, and in the steady state the pair is known both ways and persisted, so the answer is Skipped — but every chat lane first serialized on one process-wide async_lock::Mutex to find that out. The guarded body still re-checks under the lock.
Receipts without a subscriber return before parsing (src/receipt.rs). The aggregated branch gated after parse_participants had built two Jids and two CompactStrings per <user> of a group read, and the simple branch never gated at all. One check after receipt_type is resolved covers both; only retry is exempt, because it feeds the resend pipeline regardless.
The decrypt loop seeds its StdRng lazily (src/message/receive.rs). rand::make_rng::<StdRng>() per stanza pulled 32 bytes of entropy and ran a ChaCha key schedule for a generator only the DH-ratchet step draws from. ThreadRng would avoid the seeding but is !Send across the lane worker's awaits, so a LazyStdRng wrapper seeds on first draw.
Decoded JID tokens render into a right-sized CompactString (wacore/binary/src/decoder.rs, jid.rs). with_capacity(user.len() + 20) exceeded the 24-byte inline budget for any user longer than four characters, so every JID token in a device-list or usync response heap-allocated even when the rendered JID (a group id, a LID) fit inline.

Per send

Session establishment spawns one task per chunk (wacore/src/send/encrypt.rs). The encrypt fan-out two functions down was already chunked, with a comment saying why; ensure_sessions_for_devices still spawned a task, a oneshot, a boxed future and two boxed store clones per device needing a prekey — the whole cohort on a cold group send. Same ENCRYPT_FANOUT_CONCURRENCY partitioning, same per-device outcomes; a lost chunk is reported with its device count.
get_lid_for_phone runs once per device in the same function; the prekey branch re-ran the boxed async_trait lookup the session probe had just done.
Session write-back (wacore/src/store/signal_cache.rs): UserIndexedCache::insert goes through the entry API so the user fingerprint (separator scan + hash) is computed only for a new key, not on the overwrite every send and decrypt performs; put_with_key skips the deleted set while it is empty, which is every ordinary write-back.

Refuted or deliberately left out

MessageInfo boxing (meta_info, comment_target, device_sent_meta, ~330 B of rarely-present fields inline) and MessageId = String → CompactString: real, but both change public field types. Separate PR.
The skipped-message-key layout (MessageKey at 136 B inline plus a 32 B Bytes for a seed-only key): a 5× win on lossy chains, but it spans the generated SessionStructure types and their round-trip tests.
SenderKeyRecord is deep-cloned out of the cache on every group load (Arc::unwrap_or_clone while the cache keeps its Arc). The per-state hot fields are already Arc/Copy, so the clone is the VecDeque plus a SenderKeyStateStructure per state; a checkout path like the session store's would remove it but needs the same CheckedOut marker machinery. Not this PR.
The decoder's one Box<[..]> per node with attributes or children: a bump arena would make it O(1) per frame, but it goes through the Yokeable impl Miri gates and changes AttrsRef/NodeContentRef. A project, not a patch.
Trimming the ack Vec so Bytes::from reuses it: AckNode is a hand-written encoder with no size plan, and a shrinking realloc crosses a size class on jemalloc, so neither exact sizing nor shrink_to_fit is a clear win over the one shared header. Tried and reverted in review.
session_locks / message_retry_counts keyed by String rather than Arc<str>: with the duplicate key gone this saves ~8 B/entry. Not worth the diff.

Compatibility

No public API removed or changed. Added: SenderKeyMessage: TryFrom<Bytes>, group_decrypt_shared, wacore_binary::jid::jid_ref_to_compact. ChatLane (pub(crate)) gains worker_running. agent_docs/observability.md notes the lane idle exit.

Validation

cargo fmt --all --check
cargo test -p wacore-binary                                   # 147 unit + integration
cargo test -p wacore-libsignal --lib                          # 241 passed
cargo test -p wacore --lib                                    # 1566 passed, 1 ignored
cargo test -p whatsapp-rust --lib                             # 1865 passed, 1 ignored
cargo clippy -p whatsapp-rust -p wacore -p wacore-binary -p wacore-libsignal --all-targets -- -D warnings

The size gate's numbers are in the table above: the per-cache BTreeMap<u64, K> instantiations collapse into one BTreeMap<u64, u64>, and no new sort or generic fan-out was added. Full matrix, wasm32, Miri and CodSpeed on CI. Semver Checks (informational) is red for waproto fields a whatspec regeneration already on main removed; this branch does not touch waproto.

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…opies Resident memory: - Chat lane workers exit after 60 s idle instead of holding the ~9 KiB inbound-message future for the life of the connection, one per chat that ever spoke; the next message respawns the worker behind the old one's running lock so a draining tail never interleaves with its successor. - PortableCache stores each key once: a hashbrown table keyed by the stored hash, with the FIFO index as seq -> hash instead of seq -> cloned key. Unbounded caches (the LID<->PN maps) keep no FIFO index at all. - GroupInfo participants shrink after every membership change. Per message: - SenderKeyMessage holds Bytes, so a received skmsg is parsed as a slice of its frame buffer instead of copied; group_decrypt writes into an exact-size plaintext rather than handing away a thread-local buffer and replacing it with a fresh 1 KiB one. - The LID<->PN relearn check runs before the process-wide mutation mutex. - Receipts without a subscriber return before parsing <participants> or building the id list; retries are exempt. - The decrypt loop seeds its StdRng lazily, on the DH-ratchet step only. - Ack frames are trimmed so Bytes::from reuses the Vec allocation. - Decoded JID tokens render into a CompactString sized to the JID. Per send: - Session establishment spawns one task per chunk, not per device. - The PN->LID lookup runs once per device in ensure_sessions_for_devices. - Session write-back registers the user fingerprint only for a new key and skips the empty deleted set. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0172fpxasGTrouFyYH5UGmjN

chatgpt-codex-connector · 2026-09-02T15:33:39Z

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coderabbitai · 2026-09-02T15:34:31Z

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📝 Summary

Summary by CodeRabbit

New Features
- Chat workers now close after 60 seconds of inactivity and restart automatically when new messages arrive.
- Busy chat lanes remain active while processing messages.
Bug Fixes
- Prevented overlapping workers from processing messages for the same chat.
- Improved receipt handling when event listeners are unavailable.
Performance
- Reduced memory usage and unnecessary processing during message encryption, decryption, caching, participant updates, and session establishment.
- Improved responsiveness when recording contact identity updates.

Walkthrough

The pull request updates chat-lane lifecycle control, cache storage, shared group decryption, session establishment, and allocation paths. It adds idle-worker replacement, shared ciphertext handling, hash-table cache storage, chunked session setup, and targeted fast paths.

Changes

Chat lane lifecycle

Layer / File(s)	Summary
Idle worker replacement and serialization `src/client.rs`, `src/handlers/message.rs`, `src/client/tests.rs`, `agent_docs/observability.md`	Workers stop after 60 seconds of inactivity. Replacement workers reuse a shared lock. Tests cover replacement and busy-lane behavior.

Shared group decryption

Layer / File(s)	Summary
Shared ciphertext and message storage `wacore/libsignal/src/protocol/group_cipher.rs`, `wacore/libsignal/src/protocol/protocol.rs`, `wacore/libsignal/src/protocol/mod.rs`	Group decryption accepts `Bytes`. `SenderKeyMessage` retains shared serialized storage and returns right-sized plaintext output.
Decryption call-site and RNG updates `src/message.rs`, `src/message/receive.rs`	Message receiving uses shared ciphertext handles. Session and PN-to-LID decryption paths initialize the random generator lazily.

Portable cache storage

Layer / File(s)	Summary
HashTable storage and FIFO eviction `src/portable_cache.rs`	Cache entries use hashed `Slot` values. FIFO order stores hashes instead of duplicate keys. Unbounded caches omit the FIFO index.
Cache storage and index tests `src/portable_cache.rs`	Tests verify table-backed access, no key cloning, and absent FIFO indexing for unbounded caches.

Session processing optimizations

Layer / File(s)	Summary
Chunked session establishment `wacore/src/send/encrypt.rs`	LID overrides resolve once per device. Session setup processes contiguous device chunks and aggregates outcomes.
LID recording and signal cache writes `src/client/lid_pn.rs`, `wacore/src/store/signal_cache.rs`	Known durable LID/PN pairs skip locking. Cache writes avoid repeated fingerprint work and unnecessary deleted-set hashing.

Allocation and dispatch cleanup

Layer / File(s)	Summary
Participant collection capacity `wacore/src/client/context.rs`	Participant lists shrink excess capacity after membership changes.
Receipt filtering and shared JID formatting `src/receipt.rs`, `wacore/binary/src/jid.rs`, `wacore/binary/src/decoder.rs`	Unhandled ordinary receipts exit before parsing. JID formatting uses a shared stack-aware helper.

Estimated code review effort: 4 (Complex) | ~60 minutes

Merge Risk: 🔵 Low · up to 1b085

The PR reduces resident and per-message memory while changing message-worker lifecycle and receipt gating. An unresolved path may drop EncRekeyRetry receipts when no receipt handler is registered, which could interfere with resend processing; the change is otherwise mergeable with explicit owner awareness or follow-up on that bounded issue.

Sequence Diagram(s)

sequenceDiagram
  participant MessageHandler
  participant ChatLane
  participant Worker
  MessageHandler->>ChatLane: enqueue message
  ChatLane->>Worker: process queued message
  Worker->>ChatLane: close after idle timeout
  MessageHandler->>ChatLane: replace closed lane
  ChatLane->>Worker: acquire shared running lock

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 68.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 75 functions across 16 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly summarizes the pull request's primary performance changes: reducing resident per-chat and per-entry memory and trimming per-message copies.
Description check	✅ Passed	The description directly explains the memory and allocation optimizations, compatibility goals, implementation details, and validation results covered by the changeset.

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greptile-apps · 2026-09-02T15:38:09Z

Greptile Summary

This PR reduces persistent and per-message memory use while preserving existing protocol behavior and public interfaces, apart from two additive APIs.

Retires idle per-chat workers and coordinates replacement lane generations.
Stores PortableCache keys once and omits unnecessary FIFO indexes for unbounded caches.
Removes group-message copies through shared Bytes payloads and exact-size decryption buffers.
Reduces allocation and synchronization overhead in receipt handling, JID decoding, LID/PN learning, session establishment, and signal-cache updates.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
src/handlers/message.rs	Adds idle chat-lane retirement and lock-preserving lane replacement to reduce resident worker state.
src/portable_cache.rs	Replaces duplicate-key FIFO indexing with hash-and-sequence indexing while preserving collision-aware lookup and removal.
wacore/libsignal/src/protocol/protocol.rs	Allows SenderKeyMessage parsing to retain shared Bytes storage instead of allocating and copying its envelope.
wacore/libsignal/src/protocol/group_cipher.rs	Adds shared group decryption and allocates plaintext output according to ciphertext size.
wacore/src/send/encrypt.rs	Reduces cold-send task and lookup overhead by chunking session establishment and reusing device mappings.
wacore/src/store/signal_cache.rs	Avoids redundant key fingerprinting and deleted-set probes during ordinary signal-cache writes.
src/client/lid_pn.rs	Adds an unlocked steady-state relearn check while retaining the guarded recheck before mutation.
src/receipt.rs	Skips receipt participant parsing when no subscriber can consume the event, while preserving retry handling.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Incoming message stanza] --> B[Resolve normalized chat JID]
    B --> C[Fetch cached chat lane]
    C --> D{Queue accepts message?}
    D -->|Yes| E[Existing worker processes sequentially]
    D -->|Closed after idle timeout| F[Replace cached lane using inherited locks]
    F --> G[Successor waits for predecessor worker]
    G --> E
    E --> H{Queue remains empty for 60 seconds?}
    H -->|No| E
    H -->|Yes| I[Close queue, drain accepted tail, exit worker]

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jlucaso1 · 2026-09-02T15:39:12Z

Semver Checks (informational) is red on this head, and it is not this PR's.

The job is continue-on-error: true and documented as advisory. Every item it reports is a waproto field removed by a whatspec regeneration already on main (EncryptMessageOutput.message_key, AIRichResponseContentItemMetadata.a_i_rich_response_content_item, the MESSAGE_KEY tag), compared against the last published waproto 0.7.0. git diff origin/main...HEAD -- waproto/ is empty for this branch, so there is nothing here to port; it clears with the next waproto release. Same situation #1353 recorded.

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… queued An enqueue that finds the fresh lane in the cache can then only land behind the message that replaced the idle one, so the hand-off keeps the chat's order even for enqueues that do not share the old lane's lock. Not reachable today, since <message> stanzas are enqueued inline from the read loop, but the invariant should not depend on that. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0172fpxasGTrouFyYH5UGmjN

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codspeed-hq · 2026-09-02T15:46:33Z

Merging this PR will improve performance by 70.39%

⚠️

Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

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⚡ 19 improved benchmarks
✅ 431 untouched benchmarks
⏩ 12 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	`BASE`	`HEAD`	Efficiency
⚡	Memory	`bench_group_recv`	2,807 B	807 B	×3.5
⚡	Memory	`group_decrypt_warm_record`	1,518 B	510 B	×3
⚡	Memory	`bench_group_in_order_decrypt_with_backlog`	1,519 B	511 B	×3
⚡	Memory	`bench_group_decrypt_message`	1,584 B	592 B	×2.7
⚡	Memory	`bench_chat_lane_create[0, 4096]`	94.2 KB	50.4 KB	+87%
⚡	Memory	`bench_chat_lane_create[8, 4096]`	94.2 KB	50.4 KB	+87%
⚡	Memory	`bench_chat_lane_create[8, 256]`	22.3 KB	12 KB	+85.91%
⚡	Memory	`bench_chat_lane_create[0, 256]`	22.4 KB	12.1 KB	+85.02%
⚡	Simulation	`bench_chat_lane_create[8, 16]`	9.1 ms	5.5 ms	+64.74%
⚡	Simulation	`bench_chat_lane_create[8, 256]`	9.3 ms	5.8 ms	+62.38%
⚡	Simulation	`bench_chat_lane_create[8, 4096]`	9.6 ms	6 ms	+60.59%
⚡	Memory	`group_decrypt_prewarmed_record`	2.7 KB	1.7 KB	+58.37%
⚡	Memory	`group_decrypt_rebuilt_record`	2.8 KB	1.8 KB	+55.54%
⚡	Simulation	`bench_chat_lane_create[0, 256]`	6.3 ms	5.5 ms	+15.85%
⚡	Memory	`group_info_add_participants[1024]`	236.1 KB	204.1 KB	+15.66%
⚡	Memory	`group_info_add_participants[256]`	59.1 KB	51.1 KB	+15.6%
⚡	Simulation	`bench_chat_lane_create[0, 4096]`	6.6 ms	5.7 ms	+15.51%
⚡	Simulation	`bench_chat_lane_create[0, 16]`	6.3 ms	5.5 ms	+15.4%
⚡	Memory	`group_info_add_participants[64]`	14.8 KB	12.8 KB	+15.33%

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…mption, lane lock, drop ack shrink - SenderKeyMessage::try_from(&[u8]) validates before it copies, so a malformed payload is rejected without being owned. - Only `retry` receipts bypass the no-subscriber gate: `enc_rekey_retry` has no side effect before its event is dropped. - A message that joins an already-replaced lane, or loses the race to publish one, goes in under that lane's enqueue lock. - The ack `shrink_to_fit` is dropped: a shrinking realloc is not free on every allocator, so it was not a clear win over the shared header. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0172fpxasGTrouFyYH5UGmjN

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Inline comments:
In `@src/handlers/message.rs`:
- Line 93: Update the replacement-lane creation at create_chat_lane to pass
Arc::clone(&lane.enqueue_lock) alongside the reused worker_running state,
preserving enqueue ordering across predecessor and fresh lanes. Keep creating a
new enqueue lock only when initializing the first lane.

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…swap A replacement lane inherits the predecessor's enqueue_lock as well as its worker_running lock, so every enqueue for a chat, before or after the swap, goes through one total order, and the replacement itself happens under that lock. With that, nothing needs to be queued before the lane is published: a cancellation mid-replacement leaves at worst an empty worker that idles out. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0172fpxasGTrouFyYH5UGmjN

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Confidence score: 5/5

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Inline comments:
In `@src/receipt.rs`:
- Around line 602-603: Update the early-return condition in the receipt handling
flow to exempt both ReceiptType::Retry and ReceiptType::EncRekeyRetry when no
EventKind::Receipt handler exists. Preserve the existing EncRekeyRetry branch so
its logging and event dispatch still execute.

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github-actions · 2026-09-02T16:06:47Z

📦 Binary size report

Metric	main	PR	Δ
bin size (stripped)	10.42 MiB	10.35 MiB	-73.56 KiB (-0.69%) 🔽
bin .text	8.36 MiB	8.29 MiB	-69.69 KiB (-0.81%) 🔽
bin allocated (text+data+bss)	10.42 MiB	10.35 MiB	-71.58 KiB (-0.67%) 🔽
llvm-lines wacore	565,731	567,011	+1,280 (+0.23%) 🔺
llvm-lines wacore copies	18,526	18,583	+57 (+0.31%) 🔺
llvm-lines whatsapp-rust lib	820,848	789,935	-30,913 (-3.77%) 🎉
llvm-lines whatsapp-rust lib copies	25,513	25,118	-395 (-1.55%) 🎉
deps crates (Cargo.lock)	468	468	0

.text per crate

Crate	main	PR	Δ
.text whatsapp_rust	1.97 MiB	1.90 MiB	-72.85 KiB (-3.61%) 🎉
.text wacore	741.91 KiB	741.16 KiB	-771 B (-0.10%) 🔽
.text wacore_binary	81.21 KiB	81.88 KiB	+687 B (+0.83%) 🔺
.text wacore_libsignal	185.56 KiB	184.80 KiB	-785 B (-0.41%) 🔽
.text wacore_appstate	28.34 KiB	28.34 KiB	0
.text wacore_noise	20.92 KiB	20.92 KiB	0
.text waproto	1.79 MiB	1.79 MiB	0
.text whatsapp_rust_sqlite_storage	546.07 KiB	546.07 KiB	0
.text whatsapp_rust_tokio_transport	40.57 KiB	40.57 KiB	0
.text whatsapp_rust_ureq_http_client	12.75 KiB	12.75 KiB	0
.text std	1.00 MiB	1.01 MiB	+960 B (+0.09%) 🔺
.text other deps	1.93 MiB	1.94 MiB	+3.43 KiB (+0.17%) 🔺

Top movers (cargo-bloat attribution)

Crate	main	PR	Δ
whatsapp_rust	1.97 MiB	1.90 MiB	-72.85 KiB (-3.61%)
metrics_exporter_prometheus	(absent)	4.96 KiB	+4.96 KiB
hashbrown	5.00 KiB	3.21 KiB	-1.79 KiB (-35.72%)

Baseline: ec72862c3 (latest main run) · Head: 1e5482022 · Graphs

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Actionable comments posted: 1

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Inline comments:
In `@src/handlers/message.rs`:
- Around line 66-70: Remove the duplicated lock-lifecycle rationale from
src/handlers/message.rs lines 66-70 and 136-138, and remove the repeated
worker_running lifecycle explanation from src/client.rs lines 382-383. Keep the
single authoritative inheritance rationale at the replacement construction in
src/handlers/message.rs lines 98-102; no changes are needed there.

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ℹ️ Review info

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src/client.rs
src/handlers/message.rs

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Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0172fpxasGTrouFyYH5UGmjN

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cubic-dev-ai

0 issues found across 2 files (changes from recent commits).

Confidence score: 5/5

Automated review surfaced no issues in the provided summaries.
No files require special attention.

_{Requires human review: Perf PR mixes memory optimizations with lifecycle/concurrency changes: chat lanes idle-exit after 60s, session fan-out is chunked, PortableCache is rewritten, and crypto paths are altered. These operational tradeoffs and truncated diffs need human validation.

Re-trigger cubic}

coderabbitai Bot added api-design performance labels Sep 2, 2026

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Comment thread src/handlers/message.rs

Comment thread src/client/lid_pn.rs

Comment thread src/client.rs Outdated

Comment thread wacore/src/send/encrypt.rs

Comment thread wacore/libsignal/src/protocol/protocol.rs Outdated

Comment thread src/receipt.rs Outdated

greptile-apps Bot previously approved these changes Sep 2, 2026

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Comment thread src/handlers/message.rs Outdated

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Comment thread src/handlers/message.rs Outdated

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Comment thread src/handlers/message.rs Outdated

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Comment thread src/receipt.rs

coderabbitai Bot removed api-design performance labels Sep 2, 2026

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Comment thread src/handlers/message.rs Outdated

docs(lanes): state the shared-lock rationale once, at create_chat_lane

ff74d74

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0172fpxasGTrouFyYH5UGmjN

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jlucaso1 merged commit b918e4d into main Sep 2, 2026
41 of 42 checks passed

jlucaso1 deleted the claude/whatsapp-rust-perf-memory-majqrz branch September 2, 2026 16:23

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jlucaso1 commented Sep 2, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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Summary

Resident memory

Per message

Per send

Refuted or deliberately left out

Compatibility

Validation

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chatgpt-codex-connector Bot commented Sep 2, 2026

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Approval pending

Summary by CodeRabbit

Walkthrough

Changes

Sequence Diagram(s)

❌ Failed checks (1 warning)

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Greptile Summary

Confidence Score: 5/5

Important Files Changed

Flowchart

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jlucaso1 commented Sep 2, 2026

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codspeed-hq Bot commented Sep 2, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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Merging this PR will improve performance by 70.39%

Performance Changes

Footnotes

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📦 Binary size report

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jlucaso1 commented Sep 2, 2026 •

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