fix(web): make performance timing non-blocking - #1665
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Included review availability: Your plan provides up to 8 included reviews per hour; 6 remain after this review. WalkthroughPerformance measurement utilities now tolerate instrumentation failures and compute durations from ChangesPerformance measurement
Priority: ➖ Normal Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix · Severity of issue fixed: Medium Merge Risk: ⚪ Minimal · up to The performance instrumentation change keeps timing failures from affecting application operations while retaining timestamp-based duration reporting. No actionable merge risk remains. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@packages/web/src/lib/utils.test.ts`:
- Around line 55-70: Add an async test alongside the existing measureSync
instrumentation-failure test that mocks performance.now timestamps and makes
performance.mark and performance.measure throw, then awaits measure with an
async callback and asserts the returned data and timestamp-derived duration.
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CHANGELOG.mdpackages/web/src/lib/utils.test.tspackages/web/src/lib/utils.ts
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1 issue found across 3 files
Prompt for AI agents (unresolved issues)
Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.
<file name="packages/web/src/lib/utils.test.ts">
<violation number="1" location="packages/web/src/lib/utils.test.ts:55">
P3: Add an async regression test where `performance.mark()` and `performance.measure()` throw, and assert that `measure()` still returns the callback result with the timestamp-derived duration.</violation>
</file>
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| test('ignores performance timeline instrumentation failures', () => { |
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P3: Add an async regression test where performance.mark() and performance.measure() throw, and assert that measure() still returns the callback result with the timestamp-derived duration.
Prompt for AI agents
Check if this issue is valid — if so, understand the root cause and fix it. At packages/web/src/lib/utils.test.ts, line 55:
<comment>Add an async regression test where `performance.mark()` and `performance.measure()` throw, and assert that `measure()` still returns the callback result with the timestamp-derived duration.</comment>
<file context>
@@ -0,0 +1,71 @@
+ );
+ });
+
+ test('ignores performance timeline instrumentation failures', () => {
+ vi.spyOn(performance, 'now')
+ .mockReturnValueOnce(10)
</file context>
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All reported issues were addressed
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Fixes SOU-2250
Summary
Test plan
Note
Low Risk
Client-side defensive change to shared timing helpers; behavior for successful paths is equivalent aside from duration source, with no security or data-handling impact.
Overview
Fixes code view breakage when browser Performance Timeline APIs misbehave (e.g.
performance.measure()returning no value).measure/measureSyncinpackages/web/src/lib/utils.tsnow derivedurationMsfromperformance.now()before and after the callback instead of readingmeasure.duration. Marks and named measures are still recorded for DevTools via newrecordPerformanceMark/recordPerformanceMeasurehelpers that swallow mark/measure errors so instrumentation cannot throw into callers (including code nav symbol hover and file browsing).Adds
packages/web/src/lib/utils.test.tscovering undefined measure results and thrown timeline APIs. Documents the fix under Unreleased → Fixed inCHANGELOG.md.Reviewed by Cursor Bugbot for commit 68d7cd2. Bugbot is set up for automated code reviews on this repo. Configure here.
Summary by cubic
Fixes SOU-2250 by making browser performance timing non-blocking.
measureandmeasureSyncpreviously depended onperformance.measure()'s return value; they now useperformance.now()deltas, while ignoring Performance Timeline failures so instrumentation cannot break code views or measured operations. Existing marks and named measures remain available for DevTools.Coverage
Written for commit 68d7cd2. Summary will update on new commits.
Summary by CodeRabbit
Bug Fixes
Tests
Documentation