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feat(FN-4027): memoize startup slim list reads to avoid redundant fresh fet

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Added memoization for startup slim task list reads (`store.ts`), with dashboard server routing startup reads through the memo window and tests covering the store watcher consumers in scheduler and worktree-pool, plus performance documentation.

Fusion-Task-Id: FN-4027
This commit is contained in:
Fusion
2026-05-11 18:36:53 -07:00
committed by gsxdsm
parent 3a45a3fc25
commit 1772572191
9 changed files with 112 additions and 4 deletions
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40
packages/core/src/__tests__/store-watcher.test.ts
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@@ -8,6 +8,46 @@ describe("TaskStore", () => {
afterEach(harness.afterEach);
describe("watcher and polling", () => {
it("memoizes repeated startup slim list reads for matching options", async () => {
await harness.createTestTask();
const storeAny = harness.store() as any;
const prepareSpy = vi.spyOn(storeAny.db, "prepare");
await harness.store().listTasks({ slim: true, includeArchived: false, startupMemo: true });
await harness.store().listTasks({ slim: true, includeArchived: false, startupMemo: true });
const taskSelectCalls = prepareSpy.mock.calls.filter(([sql]) =>
typeof sql === "string" && sql.includes("FROM tasks") && sql.includes("ORDER BY createdAt ASC"),
);
expect(taskSelectCalls).toHaveLength(1);
});
it("separates startup memo entries by list options", async () => {
await harness.createTestTask();
const storeAny = harness.store() as any;
const prepareSpy = vi.spyOn(storeAny.db, "prepare");
await harness.store().listTasks({ slim: true, includeArchived: false, startupMemo: true });
await harness.store().listTasks({ slim: true, includeArchived: true, startupMemo: true });
const taskSelectCalls = prepareSpy.mock.calls.filter(([sql]) =>
typeof sql === "string" && sql.includes("FROM tasks") && sql.includes("ORDER BY createdAt ASC"),
);
expect(taskSelectCalls.length).toBeGreaterThanOrEqual(2);
});
it("invalidates startup memo once watch handoff is active", async () => {
await harness.createTestTask();
const storeAny = harness.store() as any;
await harness.store().listTasks({ slim: true, includeArchived: false, startupMemo: true });
expect(storeAny.startupSlimListMemo.size).toBeGreaterThan(0);
await harness.store().watch();
expect(storeAny.startupSlimListMemo.size).toBe(0);
harness.store().stopWatching();
});
it("cache is updated when polling is active even without fs.watch", async () => {
await harness.store().watch();