Hidden panes are exempt from pendingData flow control (main gate-drops
their bytes after ingestion), so N background agents ran unbounded ahead
on the one shared daemon->main stream socket (measured 192MB user-space
backlog) and visible-pane echo waited FIFO behind it — typing appeared
seconds late whenever several agents burst on a loaded machine
(8x512KB/s + 12 CPU spinners: p50 293ms fix-off; 12x1MB/s: 6.1s).
Mechanism (replaces producer pacing — no reveal catch-up, ever):
- Shallow socket write gate (128KB) + per-session fairness bypass bounds
echo latency by construction; kernel-flush refill sentinel keeps held
bulk draining at full speed (drain-only refill capped at ~8MB/s).
- Backgrounded sessions' queued output is keep-tail dropped (newest
512KB kept, in-order dataGap replaces the middle); a ~2MB GLOBAL
budget shrinks per-session keep-tails (floor 64KB) so a worktree
switch never waits behind the aggregate. Reply-eliciting query bytes
(DSR/DA/OSC probes) are salvaged from dropped spans.
- Notifications are structurally lossless: the daemon runs the same
shared scanners main uses (bell/OSC 133/pr-link/2031) over every byte
BEFORE drop decisions and relays facts in byte order; ordered
background markers hand scan authority back and forth, seeded with the
emulator's partial escape tail so a sequence split across the handoff
neither phantom-fires nor goes missing. Titles/agent-status stay
main-side (kept-tail convergent).
- Main: background = hidden AND no remote view subscriber (a live
mobile/web view is never thinned); on dataGap main resets cross-chunk
parse carries, drops the headless mobile mirror, and reuses the
hidden-drop model-restore marker.
Wire: three new stream events, tolerated within protocol v19 (old mains
ignore unknown events; old daemons never see the trigger). Kill
switches: ORCA_DAEMON_BACKGROUND_STREAM_DROP=0,
ORCA_DAEMON_SHALLOW_SOCKET_GATE=0.
A/B (pnpm bench:multi-workspace-typing): 8x512KB/s + 12 CPU workers
p50 293ms/p90 647ms -> 15/21ms (= baseline); 12x1MB/s 6,146ms -> 20ms;
light loads unchanged; zero missing echoes. Latin hidden-restore e2e
green (probe-verified aggregate-drain root cause). New deterministic
repro harness: tests/e2e/terminal-multi-workspace-typing-latency.spec.ts
+ CPU pressure workers.
Co-authored-by: Orca <help@stably.ai>
Brings in 9 commits: deferred remote catalogs at startup (#7087),
owner-aware pane title decision gating the Gemini GPU fallback (#7458),
incremental transcript parsing for JSONL agents (#7593), gh rate-limit and
git-status spawn-churn fixes (#7595), WSL Codex session bridging (#7477),
jump-palette subscription gating (#7558), and the IDE font dropdown fix.
Conflict resolutions (our structure, main's semantics):
- pty-connection.ts onTitleChange: kept this branch's third parameter and
stale-derived-title guard (staleWorkingTitleClear must never feed
completion tracking), grafted main's resolvePaneTitleDecision so the
display label, GPU policy, and observeTitle all ride the owner-aware
decision (#7428/#7447).
- App.tsx startup: kept this branch's publishTerminalViewAttributesAtAppStart
(hidden-at-launch OSC 10/11 replies) ahead of main's restructured
local-first startup; dropped this branch's early ui.get() overlap — main's
#7087 now awaits ui.get at effectively the same point, making it redundant.
Gates: typecheck clean; 4298 tests across src/main/ipc, src/main/daemon,
terminal-pane, pane-manager. The delivery path (ipc/pty.ts, dispatcher,
scheduler, snapshots) had no conflicts and no incoming changes.
Co-authored-by: Orca <help@stably.ai>
Two independent pieces, no behavior change to terminal handling:
1. Daemon lifecycle file log. The detached daemon runs with stdio
ignored, so field failures have zero daemon-side evidence. The daemon
now writes rotated NDJSON lifecycle events (startup/ready/hello
accept+reject/session create/attach/exit/kill/shutdown/uncaught
exceptions) to logs/daemon.log via a new optional --log-file fork arg.
Fail-open (any fs error disables logging), adoption-neutral (old
daemons without the arg keep working, protocol untouched), and the
diagnostic bundle collector now includes the file, bounded by the same
lookback window as trace spans.
2. tools/win-update-e2e: a packaged NSIS update proof harness. Installs
version N, drives the installed app (isolated userData), plants a
canary marker session, silently updates to N+1, relaunches, and
asserts an explicit expectations profile: --expect cold-restore
(today's behavior) or --expect survival (the Phase 1 target). Window
flashes are detected by baseline-diffed window enumeration with
canary-title attribution; daemons are identified by command-line
marker, never exe name. Refuses to run when a pre-existing Orca app is
running or (without --allow-existing-install) installed, and only
uninstalls an install it fully owns.
rc kind can now append an extra prerelease identifier (rc.N.perf):
sorts above its base rc.N but below rc.N+1, so perf-branch RCs are
identifiable by clients without outranking the main RC series.
Co-authored-by: Orca <help@stably.ai>
At 9% pipeline utilization the DSR-under-load latency is fixed batching
windows, not queue depth (proved by the MessageChannel drain lever
moving nothing). Both hops charged an expected half-window per chunk;
2ms keeps burst coalescing at negligible IPC overhead (~500 msgs/s
worst case vs MB/s payloads).
Co-authored-by: Orca <help@stably.ai>
DSR under load p50 161ms — the #7139/#7150 branch does not move the
under-load latency class. Expected in hindsight: DSR replies are ordered
within the output stream, so the metric measures output-queue depth;
cooperative drain paces input responsiveness but cannot reorder the queue.
Shrinking the queue itself (producer flow control, task 6) and raising
agent-tui throughput (task 9) are the levers for this number.
Co-authored-by: Orca <help@stably.ai>
Both isolate layers of the 51x agent-tui gap found in baseline-jul02:
bare @xterm/headless parses agent-tui at 103 MB/s and daemon Session
ingest (emulator + pending-output recording + fanout) at 103 MB/s —
on the byte stream the full Orca pipeline delivers at 2.0 MB/s.
Parser and daemon are exonerated; the loss is in main per-chunk
processing, delivery/ACK pacing, or renderer layers above xterm.
Co-authored-by: Orca <help@stably.ai>
Headline: Orca DSR latency under 1MB/s agent-TUI load is p50 134ms / p99 292ms
vs 0.45ms (Terminal.app) and 0.21ms (Ghostty). Idle latency is fine (0.69ms
p50) — the problem is queueing under load, not the pipeline hop. agent-tui
fenced throughput: Orca 2.0 MB/s vs Terminal.app 37 MB/s, Ghostty 78 MB/s.
Co-authored-by: Orca <help@stably.ai>
Run inside any terminal (Orca pane, iTerm2, Ghostty, Terminal.app, VS Code)
to measure its full byte path. DSR round-trip latency at idle and under a
paced agent-TUI load, plus fenced throughput over four deterministic
fixtures. The DSR fence forces 'all bytes parsed' before the clock stops so
xterm.js-class ingest queues can't flatter the result.
First piece of the terminal performance initiative's measurement rig.
Co-authored-by: Orca <help@stably.ai>
Migrate fileURLToPath(import.meta.url) / dirname(...) boilerplate to the
native import.meta.dirname / import.meta.filename, then enable the rule
at error so new code stays on the native form.
The oxlint autofix rewrites the expression but leaves the now-unused
node:url / node:path imports behind (which the already-enabled
no-unused-vars=error would then flag), so this commit also removes those
34 orphaned imports — trimming the named import where other names are
still used, deleting the line where it was the sole import.
Scope is build scripts + Node-env tests only (config/scripts, tools/
benchmarks, *.test.{ts,mjs}, vitest configs); zero shipped runtime code.
The native properties are exact equivalents (Node >= 20.11; repo is on
24), so behavior is unchanged.
Verified: oxlint 0 errors tree-wide (root + mobile), oxfmt clean,
typecheck (node+cli+web) + mobile tsc pass, root vitest 22825 passed /
0 failed, mobile vitest 1018 passed. Exercised the rewritten scripts
directly: build:relay (6 targets), ensure-native-runtime,
verify-macos-entitlements all run correctly with import.meta.dirname.
Jinwoo-HandOrca
Jinwoo HongandOrca
Neil