Commit Graph
2 Commits
Author SHA1 Message Date
Neil 49e5fa597a refactor(lint): enable anti-slop/no-reflect-apply (#20782)
`anti-slop/no-reflect-apply` rejects `Reflect.apply(fn, thisArg, argsArray)`.
It defeats the call-signature checks TypeScript applies to an ordinary call:
the args array is checked as an array, not positionally against the callee's
parameters, so arity and type errors pass silently. Dynamic dispatch belongs
behind a named interface, not behind a reflective call.

Flipped the rule from "off" to "error" and cleared all 17 baseline violations
across `src config tests mobile` (16 sites; one file had two).

Fix pattern: `Reflect.apply(fn, recv, args)` becomes `fn.call(recv, ...args)`,
or a direct method call when the implicit receiver is already the right object.
The receiver is preserved at every site.

Where the callee is a captured built-in whose overloads split on an argument's
shape (`String.prototype.split`, `JSON.stringify`), a call-signature capture no
longer compiles once the args are passed positionally. Those three sites capture
the function through a method-shaped type
(`{ split(separator: unknown, limit?: number): string[] }['split']`), which keeps
the forwarding call checked rather than asserted.

Behaviour notes:
- `diff-section-layout.test.ts` drops a `limit === undefined ? [sep] : [sep, limit]`
  conditional. Equivalent: `String.prototype.split` maps an undefined limit to
  2^32-1, and the `Symbol.split` path forwards undefined either way.
- `workspace-space-compaction.test.ts` forwards `reduce`'s two arguments unchanged,
  so the `arguments.length >= 2` initial-value branch is unaffected.
- `agent-session-history-byte-accounting.test.ts` is the one site where the receiver
  is not literally preserved (`JSON` -> undefined). `JSON.stringify` never reads
  `this` per spec, and restoring `.call(JSON, ...)` would reintroduce the overload
  failure under strictBindCallApply.

No suppression comments added — the rule has zero `oxlint-disable` sites.

`Reflect.apply` still appears at electron.vite.config.ts:159, inside a template
literal of generated bootstrap source. That is string content, not lintable code.
2026-09-15 00:10:11 -07:00
JinjingandJinwoo-H d2d32691ef perf(persistence): skip redundant whole-state flushes on terminal reattach (#20137)
* perf(persistence): add pty-binding fast lane to skip redundant flushes

Terminal pane reattachment currently clones the session and serializes the
entire 9.2 MB app state even when the binding is already in place and durable.
Add an early-return fast path that skips this work when all nine predicates
hold: no split, binding matches in-memory and on-disk, incarnation matches,
no tombstone, and generation counter proves durability.

Includes one-line fix in `writeToDiskSync` to record hash-matched sync flushes
as durable, so the fast path doesn't stay parked behind a stale generation.

Adds `persistence.pty-binding` observability spans (local NDJSON, unsampled for
mutations, budgeted for fast-lane hits) to measure eligibility rates before
and after. Includes ratchet test to ensure every binding writer bumps the
generation. Diagnostic tools and full investigation notes from September 7,
2026 capture that identified the 59–100 ms no-op binds and measured a real
terminal keystroke queued 117 ms behind one such call.

* perf(persistence): add pty-binding fast lane to skip redundant flushes

Rapid rebinds of already-durable PTY bindings (e.g., remounting panes)
were unnecessarily expensive because they cloned and flushed the entire
document state every time. Detect when a binding hasn't changed since the
last durable write and skip to return immediately, eliminating main-thread
cost on that path.

* perf(persistence): record binding.origin on the pty-binding span

Fresh spawns always flush, so a fast-lane rate over all calls is diluted
by however many terminals the user opened. Each caller knows whether it
is a spawn, a reattach, a split, or a relay reattach; pass that through
as metadata and record it so the reattach hit rate can be read from the
trace file. Never branched on.

* fix(persistence): keep the tab row on its first pane when a sibling pane binds

A tab row names one PTY, but a split tab holds several panes. The
renderer keeps the row on the first pane and refuses to let later
split-pane spawns steal it, since a remount reattaches the tab to
whatever the row says. Main overwrote it with whichever pane was binding,
and the renderer's next publish put it back, so every sibling reattach
was a state change and could never take the fast lane. On the real
profile that is 38% of panes.

Rewrite the row only when it names nothing useful: null, the PTY this
leaf is replacing, or a PTY no leaf holds. The fast-lane predicate
compares against the same rule.

* perf(persistence): record durable pty-binding flushes per pane

The global write generation is held back by any unrelated dirty
state, causing bindings unchanged for minutes to appear unpersisted
despite being on disk. Track per-pane durability to skip redundant
flushes.

* docs(persistence): describe the per-pane durability record

The durability section still described the global generation check as the
whole story and claimed there was no binding durability cache. Record the
measurement that motivated the per-pane record, and why retiring one needs
no cooperation from other binding writers.

* docs(perf): consolidate every measured Orca performance issue into one register

Folds the findings from all related debug sessions into the live lag
investigation: the persistence/main-thread work (P1-P11), host contention
(H1-H5), git and subprocess load on main (G1-G8), renderer and terminal
rendering (R1-R8), the terminal daemon session leak from the deleted
debug-orca-perf-issue worktree (D1-D9), and the Cmd-J palette review (C1-C6).

Keeps the measurement behind each claim, records what is fixed versus open,
and restates what the 117 ms keystroke delay still does not explain.

* fix: address performance review findings

* fix: satisfy diagnostic probe lint

* chore: keep investigation artifacts out of performance PR

* fix: run lag probe regression tests with Vitest

* perf(persistence): replace pane receipts with global durability check

* refactor(persistence): remove redundant binding review machinery

* test(persistence): satisfy current assertion-free quality gate

---------

Co-authored-by: Jinwoo-H <jinwoo0825@gmail.com>
2026-09-14 01:04:43 -04:00