Merge pull request mobxjs#3792 from tonyraoul/es2023-array-methods

perf: ECMAScript2023 &  ECMAScript2022 array methods performance improvement for proxy

.changeset/great-trainers-beg.md

@@ -0,0 +1,5 @@
+---
+"mobx": minor
+---
+
+Improve observablearray proxy pefromance for es2023.array and es2022.array methods

.github/workflows/build_and_test.yml

@@ -15,10 +15,10 @@ jobs:
       - name: Checkout Repo
         uses: actions/checkout@master
 
-      - name: Setup Node.js 14.x
+      - name: Setup Node.js 20.x
         uses: actions/setup-node@master
         with:
-          node-version: 14.x
+          node-version: 20.x
 
       - name: Install Dependencies
         run: yarn --frozen-lockfile --ignore-scripts

.github/workflows/coveralls.yml

@@ -13,10 +13,10 @@ jobs:
           # This makes Actions fetch all Git history so that Changesets can generate changelogs with the correct commits
           fetch-depth: 0
 
-      - name: Setup Node.js 14.x
+      - name: Setup Node.js 20.x
         uses: actions/setup-node@master
         with:
-          node-version: 14.x
+          node-version: 20.x
 
       - name: Install Dependencies
         run: yarn --frozen-lockfile --ignore-scripts

packages/mobx/__tests__/perf/perf.js

@@ -196,6 +196,41 @@ results of this test:
         t.end()
     })
 
+    test(`${version} - array.es2023 findLastIndex methods`, function (t) {
+        gc()
+        let aCalc = 0
+        let bCalc = 0
+        const ar = observable([0])
+        const findLastIndexOfZero = computed(function () {
+            aCalc++
+            return ar.findLastIndex(x => x === 0);
+        })
+        const lastIndexOfZero = computed(function () {
+            bCalc++
+            return ar.lastIndexOf(0);
+        })
+        mobx.observe(findLastIndexOfZero, voidObserver, true)
+        mobx.observe(lastIndexOfZero, voidObserver, true)
+
+        const start = now()
+
+        t.equal(1, aCalc)
+        t.equal(1, bCalc)
+        for (let i = 1; i < 10000; i++) ar.push(i)
+
+        t.equal(0, lastIndexOfZero.get())
+        t.equal(0, findLastIndexOfZero.get())
+        t.equal(10000, aCalc)
+        t.equal(10000, bCalc)
+
+        const end = now()
+
+        log(
+            "Array findLastIndex loop -  Updated in " + (end - start) + " ms."
+        )
+        t.end()
+    })
+
     test(`${version} - array reduce`, function (t) {
         gc()
         let aCalc = 0

packages/mobx/__tests__/v4/base/array.js

@@ -154,6 +154,34 @@ test("find(findIndex) and remove", function () {
     expect(a.remove(20)).toBe(false)
 })
 
+test("findLast(findLastIndex) and remove", function () {
+    const a = mobx.observable([10, 20, 20])
+    let idx = -1
+    function predicate(item, index) {
+        if (item === 20) {
+            idx = index
+            return true
+        }
+        return false
+    }
+    ;[].findLastIndex;
+    expect(a.findLast(predicate)).toBe(20)
+    expect(a.findLastIndex(predicate)).toBe(2)
+    expect(a.findLast(predicate)).toBe(20)
+
+    expect(a.remove(20)).toBe(true)
+    expect(a.find(predicate)).toBe(20)
+    expect(idx).toBe(1)
+    expect(a.findIndex(predicate)).toBe(1)
+    idx = -1
+    expect(a.remove(20)).toBe(true)
+    expect(a.findLast(predicate)).toBe(undefined)
+    expect(idx).toBe(-1)
+    expect(a.findLastIndex(predicate)).toBe(-1)
+
+    expect(a.remove(20)).toBe(false)
+})
+
 test("concat should automatically slice observable arrays, #260", () => {
     const a1 = mobx.observable([1, 2])
     const a2 = mobx.observable([3, 4])
@@ -587,6 +615,8 @@ test("correct array should be passed to callbacks #2326", () => {
         "filter",
         "find",
         "findIndex",
+        "findLast",
+        "findLastIndex",
         "flatMap",
         "forEach",
         "map",
@@ -766,6 +796,31 @@ describe("dehances", () => {
         expect([...array.values()]).toEqual([...dehanced.values()])
     })
 
+    test("toReversed", () => {
+        expect(array.toReversed()).toEqual(dehanced.toReversed())
+    })
+
+     test("toSorted", () => {
+        expect(array.toSorted()).toEqual(dehanced.toSorted())
+    })
+
+     test("toSorted with args", () => {
+        expect(array.toSorted((a, b) => a - b)).toEqual(dehanced.toSorted((a, b) => a - b))
+    })
+
+     test("toSpliced", () => {
+        expect(array.toSpliced(1, 2)).toEqual(dehanced.toSpliced(1, 2))
+    })
+
+     test("with", () => {
+        expect(array.with(1, 5)).toEqual(dehanced.with(1, 5))
+    })
+
+    test("at", () => {
+        expect(array.at(1)).toEqual(dehanced.at(1))
+        expect(array.at(-1)).toEqual(dehanced.at(-1))
+    })
+
     test("flat/flatMap", () => {
         // not supported in V4
     })

packages/mobx/__tests__/v5/base/array.js

@@ -178,6 +178,34 @@ test("find(findIndex) and remove", function () {
     expect(a.remove(20)).toBe(false)
 })
 
+test("findLast(findLastIndex) and remove", function () {
+    const a = mobx.observable([10, 20, 20])
+    let idx = -1
+    function predicate(item, index) {
+        if (item === 20) {
+            idx = index
+            return true
+        }
+        return false
+    }
+    ;[].findLastIndex;
+    expect(a.findLast(predicate)).toBe(20)
+    expect(a.findLastIndex(predicate)).toBe(2)
+    expect(a.findLast(predicate)).toBe(20)
+
+    expect(a.remove(20)).toBe(true)
+    expect(a.find(predicate)).toBe(20)
+    expect(idx).toBe(1)
+    expect(a.findIndex(predicate)).toBe(1)
+    idx = -1
+    expect(a.remove(20)).toBe(true)
+    expect(a.findLast(predicate)).toBe(undefined)
+    expect(idx).toBe(-1)
+    expect(a.findLastIndex(predicate)).toBe(-1)
+
+    expect(a.remove(20)).toBe(false)
+})
+
 test("concat should automatically slice observable arrays, #260", () => {
     const a1 = mobx.observable([1, 2])
     const a2 = mobx.observable([3, 4])
@@ -630,6 +658,8 @@ test("correct array should be passed to callbacks #2326", () => {
         "filter",
         "find",
         "findIndex",
+        "findLast",
+        "findLastIndex",
         "flatMap",
         "forEach",
         "map",
@@ -807,6 +837,31 @@ describe("dehances", () => {
         expect([...array.values()]).toEqual([...dehanced.values()])
     })
 
+    test("toReversed", () => {
+        expect(array.toReversed()).toEqual(dehanced.toReversed())
+    })
+
+    test("toSorted", () => {
+        expect(array.toSorted()).toEqual(dehanced.toSorted())
+    })
+
+    test("toSorted with args", () => {
+        expect(array.toSorted((a, b) => a - b)).toEqual(dehanced.toSorted((a, b) => a - b))
+    })
+
+    test("toSpliced", () => {
+        expect(array.toSpliced(1, 2)).toEqual(dehanced.toSpliced(1, 2))
+    })
+
+    test("with", () => {
+        expect(array.with(1, 5)).toEqual(dehanced.with(1, 5))
+    })
+
+    test("at", () => {
+        expect(array.at(1)).toEqual(dehanced.at(1))
+        expect(array.at(-1)).toEqual(dehanced.at(-1))
+    })
+
     test("flat/flatMap", () => {
         const nestedArray = [{ value: 1 }, [{ value: 2 }, [{ value: 3 }]]]
         const dehancedNestedArray = nestedArray.map(dehancer)

packages/mobx/src/types/observablearray.ts

@@ -518,6 +518,7 @@ export var arrayExtensions = {
  * Without this, everything works as well, but this works
  * faster as everything works on unproxied values
  */
+addArrayExtension("at", simpleFunc)
 addArrayExtension("concat", simpleFunc)
 addArrayExtension("flat", simpleFunc)
 addArrayExtension("includes", simpleFunc)
@@ -527,15 +528,21 @@ addArrayExtension("lastIndexOf", simpleFunc)
 addArrayExtension("slice", simpleFunc)
 addArrayExtension("toString", simpleFunc)
 addArrayExtension("toLocaleString", simpleFunc)
+addArrayExtension("toSorted", simpleFunc)
+addArrayExtension("toSpliced", simpleFunc)
+addArrayExtension("with", simpleFunc)
 // map
 addArrayExtension("every", mapLikeFunc)
 addArrayExtension("filter", mapLikeFunc)
 addArrayExtension("find", mapLikeFunc)
 addArrayExtension("findIndex", mapLikeFunc)
+addArrayExtension("findLast", mapLikeFunc)
+addArrayExtension("findLastIndex", mapLikeFunc)
 addArrayExtension("flatMap", mapLikeFunc)
 addArrayExtension("forEach", mapLikeFunc)
 addArrayExtension("map", mapLikeFunc)
 addArrayExtension("some", mapLikeFunc)
+addArrayExtension("toReversed", mapLikeFunc)
 // reduce
 addArrayExtension("reduce", reduceLikeFunc)
 addArrayExtension("reduceRight", reduceLikeFunc)