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import { configureStore, createSlice } from '@reduxjs/toolkit'
import {
unstable_autotrackMemoize as autotrackMemoize,
createSelectorCreator,
lruMemoize,
weakMapMemoize
} from 'reselect'
import { vi } from 'vitest'
describe('More perf comparisons', () => {
const originalEnv = process.env.NODE_ENV
beforeAll(() => {
process.env.NODE_ENV = 'production'
})
afterAll(() => {
process.env.NODE_NV = originalEnv
})
const csDefault = createSelectorCreator(lruMemoize)
const csAutotrack = createSelectorCreator(autotrackMemoize)
interface Todo {
id: number
name: string
completed: boolean
}
type TodosState = Todo[]
const counterSlice = createSlice({
name: 'counters',
initialState: {
deeply: {
nested: {
really: {
deeply: {
nested: {
c1: { value: 0 }
}
}
}
}
},
c2: { value: 0 }
},
reducers: {
increment1(state) {
// state.c1.value++
state.deeply.nested.really.deeply.nested.c1.value++
},
increment2(state) {
state.c2.value++
}
}
})
const todosSlice = createSlice({
name: 'todos',
initialState: [
{ id: 0, name: 'a', completed: false },
{ id: 1, name: 'b', completed: false },
{ id: 2, name: 'c', completed: false }
] as TodosState,
reducers: {
toggleCompleted(state, action: PayloadAction<number>) {
const todo = state.find(todo => todo.id === action.payload)
if (todo) {
todo.completed = !todo.completed
}
},
setName(state) {
state[1].name = 'd'
}
}
})
const store = configureStore({
reducer: {
counter: counterSlice.reducer,
todos: todosSlice.reducer
},
middleware: gDM =>
gDM({
serializableCheck: false,
immutableCheck: false
})
})
type RootState = ReturnType<typeof store.getState>
const states: RootState[] = []
for (let i = 0; i < 10000; i++) {
states.push(store.getState())
store.dispatch(counterSlice.actions.increment1())
states.push(store.getState())
store.dispatch(counterSlice.actions.increment2())
states.push(store.getState())
store.dispatch(todosSlice.actions.toggleCompleted(1))
states.push(store.getState())
store.dispatch(todosSlice.actions.setName())
states.push(store.getState())
}
it('More detailed perf comparison', () => {
const cdCounters1 = csDefault(
(state: RootState) =>
state.counter.deeply.nested.really.deeply.nested.c1.value,
(state: RootState) => state.counter.c2.value,
(c1, c2) => {
return c1 + c2
}
)
const cdCounters2 = csDefault(
(state: RootState) => state.counter.deeply.nested.really.deeply.nested.c1,
(state: RootState) => state.counter.c2,
(c1, c2) => {
return c1.value + c2.value
}
)
const cdTodoIds = csDefault(
(state: RootState) => state.todos,
todos => {
return todos.map(todo => todo.id)
}
)
const cdTodoIdsAndNames = csDefault(
(state: RootState) => state.todos,
todos => {
return todos.map(todo => ({ id: todo.id, name: todo.name }))
}
)
const cdCompletedTodos = csDefault(
(state: RootState) => state.todos,
todos => {
const completed = todos.filter(todo => todo.completed)
return completed.length
}
)
const cdCompletedTodos2 = csDefault(
(state: RootState) => state.todos,
todos => {
const completed = todos.filter(todo => todo.completed)
return completed.length
}
)
const caCounters1 = csDefault(
(state: RootState) =>
state.counter.deeply.nested.really.deeply.nested.c1.value,
(state: RootState) => state.counter.c2.value,
(c1, c2) => {
return c1 + c2
}
)
const caCounters2 = csAutotrack(
(state: RootState) => state.counter.deeply.nested.really.deeply.nested.c1,
(state: RootState) => state.counter.c2,
(c1, c2) => {
// console.log('inside caCounters2: ', { c1, c2 })
return c1.value + c2.value
}
)
const caTodoIds = csAutotrack(
(state: RootState) => state.todos,
todos => {
return todos.map(todo => todo.id)
}
)
const caTodoIdsAndNames = csAutotrack(
(state: RootState) => state.todos,
todos => {
return todos.map(todo => ({ id: todo.id, name: todo.name }))
}
)
const caCompletedTodos = csAutotrack(
(state: RootState) => state.todos,
todos => {
const completed = todos.filter(todo => todo.completed)
return completed.length
}
)
const caCompletedTodos2 = csAutotrack(
(state: RootState) => state.todos,
todos => {
const completed = todos.filter(todo => todo.completed)
return completed.length
}
)
const defaultStart = performance.now()
for (const state of states) {
cdCounters1(state)
cdCounters2(state)
// console.log('csCounters2', cdCounters2(state))
cdTodoIds(state)
cdTodoIdsAndNames(state)
cdCompletedTodos(state)
cdCompletedTodos2(state)
}
const defaultEnd = performance.now()
const autotrackStart = performance.now()
for (const state of states) {
caCounters1(state)
caCounters2(state)
// console.log('State.counter: ', state.counter)
// console.log('caCounters2', caCounters2(state))
caTodoIds(state)
caTodoIdsAndNames(state)
caCompletedTodos(state)
caCompletedTodos2(state)
}
const autotrackEnd = performance.now()
const allSelectors = {
cdCounters1,
cdCounters2,
cdTodoIds,
cdTodoIdsAndNames,
cdCompletedTodos,
cdCompletedTodos2,
caCounters1,
caCounters2,
caTodoIds,
caTodoIdsAndNames,
caCompletedTodos,
caCompletedTodos2
}
// console.log('\nTotal recomputations:')
// Object.entries(allSelectors).forEach(([name, selector]) => {
// console.log(name, selector.recomputations())
// })
// console.log('Total elapsed times: ', {
// defaultElapsed: defaultEnd - defaultStart,
// autotrackElapsed: autotrackEnd - autotrackStart
// })
})
it.skip('weakMapMemoizer recalcs', () => {
const state1 = store.getState()
store.dispatch(counterSlice.actions.increment1())
const state2 = store.getState()
const csWeakmap = createSelectorCreator(weakMapMemoize)
const cwCounters2 = csWeakmap(
(state: RootState) => state.counter.deeply.nested.really.deeply.nested.c1,
(state: RootState) => state.counter.c2,
(c1, c2) => {
// console.log('inside caCounters2: ', { c1, c2 })
return c1.value + c2.value
}
)
for (let i = 0; i < 10; i++) {
cwCounters2(state1)
cwCounters2(state2)
}
console.log('cwCounters2.recomputations()', cwCounters2.recomputations())
})
test('Weakmap memoizer has an infinite cache size', async () => {
const fn = vi.fn()
let resolve: () => void
const promise = new Promise<void>(r => (resolve = r))
const registry = new FinalizationRegistry(heldValue => {
resolve()
fn(heldValue)
})
const createSelectorWeakmap = createSelectorCreator(weakMapMemoize)
const store = configureStore({
reducer: {
counter: counterSlice.reducer,
todos: todosSlice.reducer
},
middleware: gDM =>
gDM({
serializableCheck: false,
immutableCheck: false
})
})
const reduxStates: RootState[] = []
const NUM_ITEMS = 10
for (let i = 0; i < NUM_ITEMS; i++) {
store.dispatch(todosSlice.actions.toggleCompleted(1))
const state = store.getState()
reduxStates.push(state)
registry.register(state, i)
}
const cdTodoIdsAndNames = createSelectorWeakmap(
(state: RootState) => state.todos,
todos => {
// console.log('Recalculating todo IDs')
return todos.map(todo => ({ id: todo.id, name: todo.name }))
}
)
for (const state of reduxStates) {
cdTodoIdsAndNames(state)
}
expect(cdTodoIdsAndNames.recomputations()).toBe(NUM_ITEMS)
for (const state of reduxStates) {
cdTodoIdsAndNames(state)
}
expect(cdTodoIdsAndNames.recomputations()).toBe(NUM_ITEMS)
cdTodoIdsAndNames.memoizedResultFunc.clearCache()
cdTodoIdsAndNames(reduxStates[0])
expect(cdTodoIdsAndNames.recomputations()).toBe(NUM_ITEMS)
cdTodoIdsAndNames(reduxStates[1])
expect(cdTodoIdsAndNames.recomputations()).toBe(NUM_ITEMS)
// @ts-ignore
reduxStates[0] = null
if (global.gc) {
global.gc()
} else {
return
}
await promise
expect(fn).toHaveBeenCalledWith(0)
// garbage-collected for ID: 3
})
})
|