perf(cookie): memoize Cookie instances in createCookieJar (#1936) - #1971
perf(cookie): memoize Cookie instances in createCookieJar (#1936)#1971m1handr wants to merge 2 commits into
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Included review availability: Your plan provides up to 10 included reviews per hour; 6 remain after this review. WalkthroughThe cookie jar now memoizes ChangesCookie instance memoization
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to The change reuses cookie instances within a cookie jar to reduce repeated allocations while preserving normal access behavior, and no actionable merge-blocking risk remains after normal checks and review. Possibly related PRs
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Inline comments:
In `@test/cookie/explicit.test.ts`:
- Around line 122-127: Extend the memoization test around create() to cover the
existing-cookie path by initializing it with a store containing name. Access
cookie.name twice and assert both results are the same instance, while
preserving the current missing-cookie case.
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src/cookies.tstest/cookie/explicit.test.ts
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Pull request overview
Improves cookie access performance by memoizing Cookie objects created by createCookieJar, avoiding repeated allocations and preserving object identity across repeated property accesses during a request.
Changes:
- Added a per-jar
cacheinsidecreateCookieJarto reuseCookieinstances by key. - Added a unit test asserting cookie instance identity is stable across repeated accesses.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
src/cookies.ts |
Adds per-jar memoization of Cookie instances in the Proxy get trap. |
test/cookie/explicit.test.ts |
Adds a regression test for cookie instance memoization. |
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| it('memoize cookie instance across multiple accesses', () => { | ||
| const { cookie } = create() | ||
| const first = cookie.name | ||
| const second = cookie.name | ||
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| expect(first).toBe(second) | ||
| }) |
Prerequisted
bun run testand they passRelated issue
Fixes #1936
Description
The
createCookieJarproxy previously allocated a freshCookieobject and ranObject.assignon every single property access (e.g.cookie.token). When reading cookies multiple times across middleware, guards, and handlers, this caused redundant memory allocations ($O(N)$) and object identity loss.Changes:
cacheincreateCookieJarto memoizeCookieinstances by key, ensuringCookieinstance memoization.Summary by CodeRabbit
Bug Fixes
Tests