* perf(git): stop blocking main on the open-on-remote git cascade
`getRemoteFileUrl` ran up to 6 sequential `gitExecFileSync` calls on the Electron
main thread — `remote get-url`, then `getDefaultBaseRef`'s `symbolic-ref` plus up
to four `rev-parse --verify` probes — each with its own 15s timeout and no yield
between them.
A complete async twin already existed (`getDefaultBaseRefAsync` ->
`resolveDefaultBaseRefViaExec`, sharing DEFAULT_BASE_REF_PROBES), so the sync
cascade is deleted rather than converted. `getRemoteUrl`, `getRemoteFileUrl` and
`getRemoteCommitUrl` become async; all four downstream callers were already async
(`filesystem-git-url-handlers` inside `ipcMain.handle`, `runtime-git-diff-commands`
async methods) and the provider contract already typed both wrappers
`Promise<string | null>`, so no new async plumbing was needed.
Removes 3 of the 10 `gitExecFileSync` sites and the confusing name collision with
the unrelated async `getDefaultBaseRef` in hosted-review-creation-git-state.
The base-ref regression tests keep their coverage, repointed at the public async
`getBaseRefDefault`.
* perf(git): resolve the repo root in one sync spawn instead of two
getGitRepoRoot ran `rev-parse --is-inside-work-tree` and then `rev-parse
--show-toplevel` as separate blocking spawns. Each sync git call holds the main
thread for up to its whole 15s timeout, so the spawn count is the cost — and this
function is called twice per "Add Project" on a linked worktree, once directly and
once through getLinkedWorktreeMainRepoRoot's self-recursion.
Combined into one invocation. Safe only here: in a bare repo the combined form
exits non-zero, and both that throw and the plain `false` already land on the same
marker-scan fallback. probeGitRepo deliberately does NOT combine — it has to read
`false` cleanly to go on and detect a bare repo, which the combined form's exit 128
would misread as indeterminate.
* perf(git): rebuild only the repos whose authorized roots actually changed
One worktree create called `invalidateAuthorizedRootsCache()`, which dirties every
registered owner. The next authorization-requiring IPC then rebuilt by listing EVERY
repo — and the rebuild never consulted `dirty` when choosing what to list, so `dirty`
gated only whether a rebuild ran, not its scope. At 58 repos that is 58
`git worktree list` spawns, roughly ten seconds of git wall-clock through an
admission budget of four, to rediscover roots one repo changed.
Both halves were needed; scoping the invalidation alone changed nothing.
- `markAuthorizedRootsOwnerDirty` dirties a single owner, reusing the per-owner
primitives `registerWorktreeRootsForRepo` already used. It leaves `baseRevision`
and the per-repo revision map alone — that pair is the global side-effect-token
fence, and bumping it would retire in-flight tokens for untouched repos.
- `rebuildAuthorizedRootsCache(store, onlyDirty)` re-lists only owners that are
dirty, have no listing yet, or still hold recovered roots (those are retired by
comparison against a fresh listing, so skipping them would strand them as
authorized). Only `ensureAuthorizedRootsCache` passes `onlyDirty`; an explicit
rebuild keeps re-listing everything because callers use it to force a refresh —
`filesystem-auth.test.ts` pins that contract.
`invalidateAuthorizedRootsCacheForRepo` wraps the primitive and falls back to the
global form for an unknown owner or a missing store, rather than silently skipping an
invalidation and leaving a stale allowlist. Applied to the worktree-create path.
Changes that can alter the owner SET (store swap, host/WSL re-routing, nested-repo
import, folder->git upgrade) stay global. Removal paths are not converted yet.
The allowlist contents are unchanged and the failure direction is a false denial
rather than a false allow. The relist predicate is split into its own module so it is
testable alone and the cache file stays inside its line budget without a suppression.
* test(perf): measure what git orchestration actually costs the main thread
The existing churn probe (ORCA_MAIN_THREAD_DIAGNOSTICS=1) reported spawn-initiation
cost for git/gh/glab only — its 7 call sites all sit inside git/command-runner — so
it was blind to `spawnProcess`/`runProcess`, the repo's own mandated wrapper, and to
the blocking `execFileSync('ps')` per PTY resize. That understated total churn across
115 main call sites.
- `spawn-observer.ts`: a settable seam, since shared code cannot import src/main.
Unregistered in the daemon/relay/CLI, where it costs one boolean check.
- `spawnProcess` brackets `nodeSpawn` and reports; exec-file-capture's own report is
removed because it routes through runProcess and would double-count.
- `posix-pty-foreground-group` now reports its full blocking duration. Note this
lands on the daemon, not main, whenever the daemon hosts the PTY.
- `ORCA_UNMINIFIED_MAIN=1` build flag, because a minified main bundle cannot
attribute CPU-profile self time to real function names. Defaults unchanged.
- `main-thread-git-cost.spec.ts` + `analyze-main-cpuprofile.mjs`: sweeps concurrency
against real registered repos, captures the churn lines and a V8 CPU profile of
main per phase.
What it found, which is why this is worth keeping: at the width-4 admission ceiling
(~90 git:status/s) main sees ZERO event-loop gaps over 50ms and a worst gap of 23ms,
and is 85% idle. Git orchestration does not stall the main thread. Of the cost it
does incur, spawn-init is 58%, parse 5%, stdout drain 4%.
* test(perf): name the inspector params type the anti-slop gate requires
The broad `object` parameter trips anti-slop(no-object-parameters); the only
Profiler call that passes params sends `{ interval }`.
Neil
b7209b5ae9