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perf(write-path): remove artificial write delays by default (part of #1375) - #1381
perf(write-path): remove artificial write delays by default (part of #1375)#1381easonLiangWorldedtech wants to merge 4 commits into
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…oo-Code-Org#1375) Two latency sources on the agent file-write path were removed or defaulted off: - DEFAULT_WRITE_DELAY_MS is now 0 instead of 1000, so writes no longer wait a full second for post-save diagnostics by default. The setting itself is unchanged: users who rely on auto-formatters that settle asynchronously (e.g. goimports for Go) can raise writeDelayMs back up; the comment on the constant documents that tradeoff. - WriteToFileTool no longer waits delay(300) before scrollToFirstDiff(). The other five write tools (EditFile, Edit, SearchReplace, ApplyPatch, ApplyDiff) already call scrollToFirstDiff() directly, and DiffViewProvider already re-reveals the first diff on a deferred 100ms timer to beat the diff editor's late layout pass, so the 300ms pause was redundant pacing. The delay() import is removed (DiffViewProvider still uses the package). Tests: ClineProvider spec now asserts the default via DEFAULT_WRITE_DELAY_MS instead of a hardcoded 1000. WriteToFileTool and ClineProvider suites pass (19 + 151).
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Included review availability: Your plan provides up to 4 included reviews per hour; 1 remains after this review. 📝 WalkthroughWalkthroughThe PR sets the default write delay to zero, removes a fixed 300 ms pause from ChangesWrite pacing changes
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk:⚪ Minimal · up to The change removes artificial write-path delays by default and preserves the configurable delay for formatter-dependent workflows; no actionable merge-blocking risk remains after normal checks and review. Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
Full details: Docstring CoverageExplanation No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 5 files. Full details: Description checkExplanation The description identifies the related issue, explains the implementation and trade-offs, and documents focused tests and lint results. It provides the required review context despite not reproducing every template heading or checklist item. ✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@src/core/webview/__tests__/ClineProvider.spec.ts`:
- Around line 1412-1419: Add coverage for writeDelayMs in
getStateToPostToWebview(), asserting DEFAULT_WRITE_DELAY_MS when globalState has
no persisted value and the persisted value when one exists. Reuse the existing
mockContext.globalState setup and avoid adding a separate assertion about the
default constant.
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packages/types/src/global-settings.tssrc/core/tools/WriteToFileTool.tssrc/core/webview/__tests__/ClineProvider.spec.ts
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- src/core/tools/WriteToFileTool.ts
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Per CodeRabbit review on this PR: the spec covered the writeDelayMs default and pass-through via getState(), plus the save handler, but not the value returned by getStateToPostToWebview(). Add both cases (persisted value passes through; unset value falls back to DEFAULT_WRITE_DELAY_MS) so a regression that drops the field from the posted state is caught.
CI (platform-unit-test) caught a hardcoded expectation of delay(1000) in the saveChanges no-arguments test: with the new default the no-parameter saveChanges() passes DEFAULT_WRITE_DELAY_MS (0) through to delay(). Assert the constant instead of the old literal so the test tracks the shared default.
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…view state createInitialExtensionState carried a hard-coded writeDelayMs: 1000 placeholder that disagreed with the extension's own DEFAULT_WRITE_DELAY_MS fallback; it now imports and uses the shared constant. Export the initializer and add a focused pre-hydration test asserting the default, so a regression that drops it can no longer hide behind merge fixtures that supply the key manually (CodeRabbit finding on trial Zoo-Code-Org#1413).
Summary
Speed follow-through on epic #1375: removes the two artificial latency sources on the agent file-write path.
Changes
DEFAULT_WRITE_DELAY_MS: 1000 → 0 (packages/types/src/global-settings.ts)Every write (write_to_file, edit_file, edit, search_replace, apply_patch, apply_diff, and the DiffViewProvider save paths) waited a full second after saving, before reporting diagnostics. With the default now 0 the write path adds no artificial pacing.
writeDelayMsback up. The constant's doc comment now documents that tradeoff.state?.writeDelayMs ?? DEFAULT_WRITE_DELAY_MS, so the one-line default change is sufficient.delay(300)beforescrollToFirstDiff()(src/core/tools/WriteToFileTool.ts)The other five write tools already call
scrollToFirstDiff()without a preceding delay, andDiffViewProvider.scrollToFirstDiff()already re-reveals the first diff on a deferred 100 ms timer specifically to beat the diff editor's late layout pass — the 300 ms pause was redundant. The now-unuseddelayimport was removed (DiffViewProvider still imports the package).Tests
ClineProvider.spec.tsasserted the old default literally (toBe(1000)); it now assertsDEFAULT_WRITE_DELAY_MS.pnpm --dir src exec vitest run core/webview/__tests__/ClineProvider.spec.ts core/tools/__tests__/WriteToFileTool.spec.ts→ 151 + 19 passing.Tradeoff note
For languages where a post-save auto-formatter takes time to settle (Go/goimports is the documented case), the diagnostic window captured after a write is now 0 ms by default. That is the intended speed/safety tradeoff per #1375; the setting remains available for users who need the old behavior.
This is an auto-generated comment: release notes by coderabbit.ai -->Summary by CodeRabbit
- Performance
- File writes and diagnostics now appear faster by default.
- Diff views no longer pause before navigating to the first change.
- Configuration
- The default write delay is now 0 milliseconds.
- A custom delay remains available for formatters that need additional settling time before diagnostics are collected.
end of auto-generated comment: release notes by coderabbit.ai -->Summary by CodeRabbit
Bug Fixes
Consistency
Update (CodeRabbit-sync from trial #1413): head
654801346— webview createInitialExtensionState now uses the shared DEFAULT_WRITE_DELAY_MS (instead of a hard-coded 1000 placeholder) + focused pre-hydration test (trial addenda 178e6f4 + 4fc14c4). Review context: trial PR #1413.