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perf(reactivity): optimize the performance of the canObserve (#330)

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edison 2019-10-19 00:11:58 +08:00 committed by Evan You
parent 7f23eaf661
commit 60961ef5b6
1 changed files with 7 additions and 2 deletions
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9
packages/reactivity/src/reactive.ts
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@ -6,6 +6,7 @@ import {
} from './collectionHandlers' } from './collectionHandlers'
import { ReactiveEffect } from './effect' import { ReactiveEffect } from './effect'
import { UnwrapRef, Ref } from './ref' import { UnwrapRef, Ref } from './ref'
import { makeMap } from '@vue/shared'
// The main WeakMap that stores {target -> key -> dep} connections. // The main WeakMap that stores {target -> key -> dep} connections.
// Conceptually, it's easier to think of a dependency as a Dep class // Conceptually, it's easier to think of a dependency as a Dep class
@ -27,13 +28,17 @@ const readonlyValues = new WeakSet<any>()
const nonReactiveValues = new WeakSet<any>() const nonReactiveValues = new WeakSet<any>()
const collectionTypes = new Set<Function>([Set, Map, WeakMap, WeakSet]) const collectionTypes = new Set<Function>([Set, Map, WeakMap, WeakSet])
const observableValueRE = /^\[object (?:Object|Array|Map|Set|WeakMap|WeakSet)\]$/ const isObservableType = /*#__PURE__*/ makeMap(
['Object', 'Array', 'Map', 'Set', 'WeakMap', 'WeakSet']
.map(t => `[object ${t}]`)
.join(',')
)
const canObserve = (value: any): boolean => { const canObserve = (value: any): boolean => {
return ( return (
!value._isVue && !value._isVue &&
!value._isVNode && !value._isVNode &&
observableValueRE.test(toTypeString(value)) && isObservableType(toTypeString(value)) &&
!nonReactiveValues.has(value) !nonReactiveValues.has(value)
) )
} }