perf(apiWatch): avoid unnecessary traverse

[Alfred-Skyblue]

In the modification at #9928, if the reactive parameter is passed, a traverse action will be performed regardless of the circumstances. However, when the user manually passes deep:true, it results in two traverse actions, leading to unnecessary execution of traverse.

core/packages/runtime-core/src/apiWatch.ts

Lines 296 to 299 in 8f85b6d

	if (cb && deep) {
	const baseGetter = getter
	getter = () => traverse(baseGetter())
	}

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	89.5 kB (+5 B)	34 kB (+3 B)	30.7 kB (+52 B)
vue.global.prod.js	146 kB (+5 B)	53.3 kB (+4 B)	47.6 kB (-2 B)

Usages

Name	Size	Gzip	Brotli
createApp	49.8 kB (+5 B)	19.5 kB (+2 B)	17.9 kB (+52 B)
createSSRApp	53.2 kB (+5 B)	20.8 kB (+2 B)	19 kB (+1 B)
defineCustomElement	52.1 kB (+5 B)	20.3 kB (+1 B)	18.5 kB (-9 B)
overall	63.3 kB (+5 B)	24.4 kB (+2 B)	22.2 kB (-25 B)

[yyx990803]

Did the same in 24d77c2 - thanks!