fix(reactivity): optimize size retrieval in createInstrumentations

[yangdan8]

Summary by CodeRabbit

• Refactor
  • Streamlined how sizes are read for reactive Map/Set collections, reducing overhead for size checks.
  • Users may notice marginal performance improvements when viewing or computing sizes of these collections; no behavioral changes are expected.

[coderabbitai]

Walkthrough

Adjusted Map/Set size accessor in collection instrumentations to read size via direct property access (target.size) instead of Reflect.get. Existing retrieval of raw target, iterate tracking with ITERATE_KEY when not readonly, and overall control flow remain unchanged. No public API or exports altered.

Changes

Cohort / File(s)	Summary
Reactivity collection size accessor packages/reactivity/src/collectionHandlers.ts	Replace Reflect.get for size accessor with direct property access (target.size); maintain existing RAW unwrapping and ITERATE tracking; no behavior or API surface changes declared.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

I counted keys with whiskers twitch—
a hop from Reflect to size, a switch.
No paths were changed, no loops were bent,
just cleaner steps where bytes are spent.
Thump-thump! I nibble code so nice—
one tiny change, precise as rice.

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📥 Commits

Reviewing files that changed from the base of the PR and between c875019 and 7bde003.

📒 Files selected for processing (1)

• packages/reactivity/src/collectionHandlers.ts (1 hunks)

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🔇 Additional comments (1)

packages/reactivity/src/collectionHandlers.ts (1)

125-129: LGTM: direct property access preserves semantics and avoids Reflect overhead

Accessing target.size here is semantically equivalent to Reflect.get(target, 'size', target) for Map/Set and is a small win on hot paths. Tracking with ITERATE_KEY still occurs when not readonly, so reactivity behavior is unchanged.

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[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	101 kB (+101 B)	38.4 kB (+16 B)	34.6 kB
vue.global.prod.js	159 kB (+417 B)	58.6 kB (+67 B)	52.2 kB (+27 B)

Usages

Name	Size	Gzip	Brotli
createApp (CAPI only)	46.6 kB (+79 B)	18.2 kB (+22 B)	16.7 kB (+10 B)
createApp	54.6 kB (+79 B)	21.2 kB (+29 B)	19.4 kB (+20 B)
createSSRApp	58.8 kB (+79 B)	23 kB (+5 B)	20.9 kB (-8 B)
defineCustomElement	59.5 kB (+79 B)	22.8 kB (+24 B)	20.8 kB (+11 B)
overall	68.6 kB (+101 B)	26.4 kB (+19 B)	24.1 kB (-4 B)

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commit: 7bde003

[edison1105]

/ecosystem-ci run

[vue-bot]

📝 Ran ecosystem CI: Open

suite	result	latest scheduled
pinia	✅ success	✅ success
language-tools	✅ success	✅ success
router	✅ success	✅ success
radix-vue	✅ success	✅ success
quasar	✅ success	✅ success
nuxt	✅ success	✅ success
test-utils	✅ success	✅ success
vitepress	✅ success	✅ success
vant	✅ success	✅ success
primevue	✅ success	✅ success
vite-plugin-vue	✅ success	✅ success
vuetify	✅ success	✅ success
vue-i18n	✅ success	✅ success
vue-simple-compiler	✅ success	✅ success
vueuse	✅ success	✅ success
vue-macros	❌ failure	❌ failure