Optimization wollok game

.eslintrc

@@ -113,7 +113,8 @@
           "time",
           "timeEnd",
           "group",
-          "groupEnd"
+          "groupEnd",
+          "table"
         ]
       }
     ],

.github/workflows/benchmarks.yml

@@ -0,0 +1,30 @@
+name: Run Benchmarks
+
+on: [pull_request]
+
+jobs:
+  run-benchmarks:
+    if: ${{ contains(github.event.pull_request.body, '[Run benchmarks]') }}
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Read .nvmrc
+        run: echo "##[set-output name=NVMRC;]$(cat .nvmrc)"
+        id: nvm
+      - name: Use Node.js (.nvmrc)
+        uses: actions/setup-node@v3
+        with:
+          node-version: "${{ steps.nvm.outputs.NVMRC }}"
+      - name: Install dependencies
+        run: npm install
+
+      - name: Run benchmarks
+        run: npm run test:benchmarks | tail -n +7 > bench-results.txt
+        continue-on-error: true
+
+      - name: Post results to comment
+        uses: peter-evans/commit-comment@v3
+        with:
+          body-path: 'bench-results.txt'

package.json

@@ -1,7 +1,7 @@
 {
   "name": "wollok-ts",
   "version": "4.1.10",
-  "wollokVersion": ":master",
+  "wollokVersion": ":optimization-wollok-game",
   "description": "TypeScript based Wollok language implementation",
   "repository": "https://github.com/uqbar-project/wollok-ts",
   "license": "MIT",
@@ -15,7 +15,7 @@
     "prepare": "ts-node scripts/fetchLanguage.ts && npm run buildWRE && npm run copy:translations",
     "copy:translations": "cp ./language/src/resources/validationMessages/*.json ./src/validator",
     "diagnostic": "tsc --noEmit --diagnostics --extendedDiagnostics",
-    "test": "npm run test:lint && npm run test:unit && npm run test:sanity && npm run test:examples && npm run test:validations && npm run test:typeSystem && npm run test:printer",
+    "test": "npm run test:lint && npm run test:unit && npm run test:sanity && npm run test:examples",
     "test:lint": "eslint .",
     "test:coverage": "nyc --reporter=lcov npm run test",
     "test:unit": "mocha --parallel -r ts-node/register/transpile-only test/**/*.test.ts",
@@ -33,6 +33,7 @@
     "test:wtest": "mocha --delay -t 10000 -r ts-node/register/transpile-only test/wtest.ts",
     "test:printer": "mocha --parallel -r ts-node/register/transpile-only test/printer.test.ts",
     "test:parser": "mocha -r ts-node/register/transpile-only test/parser.test.ts",
+    "test:benchmarks": "mocha -t 999999 -r ts-node/register/transpile-only test/benchmarks.ts",
     "lint:fix": "eslint . --fix",
     "validate:wollokVersion": "ts-node scripts/validateWollokVersion.ts",
     "prepublishOnly": "npm run validate:wollokVersion && npm run build && npm test",

src/helpers.ts

@@ -1,7 +1,7 @@
 import { BOOLEAN_MODULE, CLOSURE_EVALUATE_METHOD, CLOSURE_MODULE, CLOSURE_TO_STRING_METHOD, INITIALIZE_METHOD, KEYWORDS, NUMBER_MODULE, OBJECT_MODULE, STRING_MODULE, VOID_WKO, WOLLOK_BASE_PACKAGE } from './constants'
 import { getPotentiallyUninitializedLazy } from './decorators'
 import { count, is, isEmpty, last, List, match, notEmpty, otherwise, valueAsListOrEmpty, when, excludeNullish } from './extensions'
-import { RuntimeObject, RuntimeValue } from './interpreter/runtimeModel'
+import { Execution, NativeFunction, RuntimeObject, RuntimeValue } from './interpreter/runtimeModel'
 import { Assignment, Body, Class, CodeContainer, Describe, Entity, Environment, Expression, Field, If, Import, Literal, LiteralValue, Method, Module, Name, NamedArgument, New, Node, Package, Parameter, ParameterizedType, Problem, Program, Reference, Referenciable, Return, Self, Send, Sentence, Singleton, Super, Test, Throw, Try, Variable } from './model'
 
 export const LIBRARY_PACKAGES = ['wollok.lang', 'wollok.lib', 'wollok.game', 'wollok.vm', 'wollok.mirror']
@@ -477,4 +477,21 @@ export const showParameter = (obj: RuntimeObject): string =>
   `"${obj.getShortRepresentation().trim() || obj.module.fullyQualifiedName}"`
 
 export const getMethodContainer = (node: Node): Method | Program | Test | undefined =>
-  last(node.ancestors.filter(parent => parent.is(Method) || parent.is(Program) || parent.is(Test))) as unknown as Method | Program | Test
+  last(node.ancestors.filter(parent => parent.is(Method) || parent.is(Program) || parent.is(Test))) as unknown as Method | Program | Test
+
+/**
+ * NATIVES
+ */
+export const compilePropertyMethod = (method: Method): NativeFunction => {
+  const message = method.name
+  return method.parameters.length == 0
+    ? compileGetter(message)
+    : compileSetter(message)
+}
+
+export const compileGetter = (message: string): NativeFunction => function* (self: RuntimeObject): Execution<RuntimeValue> {
+  return self.get(message)
+}
+export const compileSetter = (message: string): NativeFunction => function* (self: RuntimeObject, value: RuntimeObject): Execution<void> {
+  self.set(message, value)
+}

src/interpreter/runtimeModel.ts

@@ -1,7 +1,7 @@
 import { v4 as uuid } from 'uuid'
 import { BOOLEAN_MODULE, CLOSURE_EVALUATE_METHOD, CLOSURE_MODULE, DATE_MODULE, DICTIONARY_MODULE, EXCEPTION_MODULE, INITIALIZE_METHOD, KEYWORDS, LIST_MODULE, NUMBER_MODULE, OBJECT_MODULE, PAIR_MODULE, RANGE_MODULE, SET_MODULE, STRING_MODULE, TO_STRING_METHOD, VOID_WKO, WOLLOK_BASE_PACKAGE, WOLLOK_EXTRA_STACK_TRACE_HEADER } from '../constants'
 import { get, is, last, List, match, otherwise, raise, when } from '../extensions'
-import { assertNotVoid, getExpressionFor, getMethodContainer, getUninitializedAttributesForInstantiation, isNamedSingleton, isVoid, loopInAssignment, showParameter, superMethodDefinition, targetName } from '../helpers'
+import { assertNotVoid, compilePropertyMethod, getExpressionFor, getMethodContainer, getUninitializedAttributesForInstantiation, isNamedSingleton, isVoid, loopInAssignment, showParameter, superMethodDefinition, targetName } from '../helpers'
 import { Assignment, Body, Catch, Class, Describe, Entity, Environment, Expression, Field, Id, If, Literal, LiteralValue, Method, Module, Name, New, Node, Program, Reference, Return, Self, Send, Singleton, Super, Test, Throw, Try, Variable } from '../model'
 import { Interpreter } from './interpreter'
 
@@ -317,11 +317,15 @@ export class Evaluation {
 
     // Set natives
     environment.forEach(node => {
-      if (node.is(Method) && node.isNative())
-        evaluation.natives.set(node, get(natives, `${node.parent.fullyQualifiedName}.${node.name}`)!)
+      if (node.is(Method))
+        if (node.isNative())
+          evaluation.natives.set(node, get(natives, `${node.parent.fullyQualifiedName}.${node.name}`)!)
+        else if (node.fromProperty()) {
+          evaluation.natives.set(node, compilePropertyMethod(node))
+          node.compiled = true
+        }
     })
 
-
     // Instanciate globals
     const globalSingletons = environment.descendants.filter((node: Node): node is Singleton => isNamedSingleton(node))
     for (const module of globalSingletons)
@@ -459,7 +463,7 @@ export class Evaluation {
   protected *execMethod(node: Method): Execution<RuntimeValue> {
     yield node
 
-    if (node.isNative()) {
+    if (node.hasNativeImplementation) {
       const native = this.natives.get(node)
       if (!native) throw new Error(`Missing native for ${node.parent.fullyQualifiedName}.${node.name}`)
 

src/model.ts

@@ -659,6 +659,8 @@ export class Method extends Node {
 
   override parent!: Module
 
+  compiled = false
+
   constructor({ isOverride = false, parameters = [], ...payload }: Payload<Method, 'name'>) {
     super({ isOverride, parameters, ...payload })
   }
@@ -672,8 +674,12 @@ export class Method extends Node {
   }
 
   isAbstract(): this is { body: undefined } { return !this.body }
-  isNative(): this is { body?: Body } { return this.body === KEYWORDS.NATIVE }
   isConcrete(): this is { body: Body } { return !this.isAbstract() && !this.isNative() }
+  isNative(): this is { body?: Body } { return this.body === KEYWORDS.NATIVE }
+
+  fromProperty(): boolean { return this.isSynthetic && !!this.parent.lookupField(this.name) }
+
+  get hasNativeImplementation(): boolean { return this.isNative() || this.compiled }
 
   @cached
   get hasVarArgs(): boolean { return !!last(this.parameters)?.isVarArg }

src/wre/game.ts

@@ -1,7 +1,44 @@
 import { GAME_MODULE } from '../constants'
-import { assertIsNumber, assertIsNotNull, Execution, Natives, RuntimeObject, RuntimeValue } from '../interpreter/runtimeModel'
+import { assertIsNotNull, assertIsNumber, Execution, NativeFunction, Natives, RuntimeObject, RuntimeValue } from '../interpreter/runtimeModel'
 const { round } = Math
 
+
+/**
+ * Avoid to invoke getters method from properties by accessing directly to the variable
+ */
+const getter = (message: string): NativeFunction => function* (obj: RuntimeObject): Execution<RuntimeValue> {
+  const method = obj.module.lookupMethod(message, 0)!
+  return method.isSynthetic ? obj.get(message)! : yield* this.invoke(method, obj)
+}
+
+const getPosition = getter('position')
+const getX = getter('x')
+const getY = getter('y')
+
+const getObjectsIn: NativeFunction = function* (position: RuntimeObject, ...visuals: RuntimeObject[]): Execution<RuntimeValue> {
+  const result: RuntimeObject[] = []
+
+  const x = (yield* getX.call(this, position))?.innerNumber
+  const y = (yield* getY.call(this, position))?.innerNumber
+
+  if (x == undefined || y == undefined) throw new RangeError('Position without coordinates')
+
+  const roundedX = round(x)
+  const roundedY = round(y)
+  for (const visual of visuals) {
+    const otherPosition = (yield* getPosition.call(this, visual))!
+    const otherX = (yield* getX.call(this, otherPosition))?.innerNumber
+    const otherY = (yield* getY.call(this, otherPosition))?.innerNumber
+
+    if (otherX == undefined || otherY == undefined) continue // Do NOT throw exception
+
+    if (roundedX == round(otherX) && roundedY == round(otherY))
+      result.push(visual)
+  }
+
+  return yield* this.list(...result)
+}
+
 const game: Natives = {
   game: {
     *addVisual(self: RuntimeObject, positionable: RuntimeObject): Execution<void> {
@@ -30,33 +67,7 @@ const game: Natives = {
 
     *getObjectsIn(self: RuntimeObject, position: RuntimeObject): Execution<RuntimeValue> {
       const visuals = self.get('visuals')!
-      const result: RuntimeObject[] = []
-      const x = position.get('x')?.innerNumber
-      const y = position.get('y')?.innerNumber
-
-
-      if(x != undefined && y != undefined) {
-        const roundedX = round(x)
-        const roundedY = round(y)
-        for(const visual of visuals.innerCollection!) {
-
-          // Every visual understand position(), it is checked in addVisual(visual).
-          // Avoid to invoke method position() for optimisation reasons.
-          //    -> If method isSynthetic then it is a getter, we can access to the field directly
-          const method = visual.module.lookupMethod('position', 0)!
-          const otherPosition = method.isSynthetic ? visual.get('position') :yield* this.invoke(method, visual)
-
-          const otherX = otherPosition?.get('x')?.innerNumber
-          const otherY = otherPosition?.get('y')?.innerNumber
-
-          if(otherX == undefined || otherY == undefined) continue
-
-          if(roundedX == round(otherX) && roundedY == round(otherY))
-            result.push(visual)
-        }
-      }
-
-      return yield* this.list(...result)
+      return (yield* getObjectsIn.call(this, position, ...visuals.innerCollection!))!
     },
 
     *say(self: RuntimeObject, visual: RuntimeObject, message: RuntimeObject): Execution<void> {
@@ -71,26 +82,25 @@ const game: Natives = {
     *colliders(self: RuntimeObject, visual: RuntimeObject): Execution<RuntimeValue> {
       assertIsNotNull(visual, 'colliders', 'visual')
 
-      const position = (yield* this.send('position', visual))!
-      const visualsAtPosition: RuntimeObject = (yield* this.send('getObjectsIn', self, position))!
-
-      yield* this.send('remove', visualsAtPosition, visual)
+      const visuals = self.get('visuals')!
+      const otherVisuals = visuals.innerCollection!.filter(obj => obj != visual)
+      const position = (yield* getPosition.call(this, visual))!
 
-      return visualsAtPosition
+      return (yield* getObjectsIn.call(this, position, ...otherVisuals))!
     },
 
     *title(self: RuntimeObject, title?: RuntimeObject): Execution<RuntimeValue> {
-      if(!title) return self.get('title')
+      if (!title) return self.get('title')
       self.set('title', title)
     },
 
     *width(self: RuntimeObject, width?: RuntimeObject): Execution<RuntimeValue> {
-      if(!width) return self.get('width')
+      if (!width) return self.get('width')
       self.set('width', width)
     },
 
     *height(self: RuntimeObject, height?: RuntimeObject): Execution<RuntimeValue> {
-      if(!height) return self.get('height')
+      if (!height) return self.get('height')
       self.set('height', height)
     },
 
@@ -135,9 +145,9 @@ const game: Natives = {
 
       const game = this.object(GAME_MODULE)!
       const sounds = game.get('sounds')
-      if(sounds) yield* this.send('remove', sounds, self)
+      if (sounds) yield* this.send('remove', sounds, self)
 
-      self.set('status', yield * this.reify('stopped'))
+      self.set('status', yield* this.reify('stopped'))
     },
 
     *pause(self: RuntimeObject): Execution<void> {
@@ -161,7 +171,7 @@ const game: Natives = {
     },
 
     *volume(self: RuntimeObject, newVolume?: RuntimeObject): Execution<RuntimeValue> {
-      if(!newVolume) return self.get('volume')
+      if (!newVolume) return self.get('volume')
 
       const volume: RuntimeObject = newVolume
       assertIsNumber(volume, 'volume', 'newVolume', false)
@@ -172,7 +182,7 @@ const game: Natives = {
     },
 
     *shouldLoop(self: RuntimeObject, looping?: RuntimeObject): Execution<RuntimeValue> {
-      if(!looping) return self.get('loop')
+      if (!looping) return self.get('loop')
       self.set('loop', looping)
     },
 

test/benchmarks.ts

@@ -0,0 +1,67 @@
+import { should } from 'chai'
+import { resolve } from 'path'
+import { restore, stub } from 'sinon'
+import { PROGRAM_FILE_EXTENSION } from '../src'
+import { interpret } from '../src/interpreter/interpreter'
+import natives from '../src/wre/wre.natives'
+import { buildEnvironment } from './assertions'
+
+should()
+
+describe('Benchmarks', () => {
+  const results: any[] = []
+
+  after(() => console.table(results))
+
+  describe('flushEvents', () => {
+
+    function benchmark(fqn: string, expectedTime = 0) {
+      it(fqn, async () => {
+        stub(console)
+        const iterations = 30
+
+        const program = `games.${fqn}`
+        const message = 'flushEvents'
+
+        let totalTime = 0
+        for (let index = 0; index < iterations; index++)
+          totalTime += await measure(program, message)
+
+
+        const time = totalTime / iterations
+        const deltaError = expectedTime * 0.15 // 15 %
+        restore()
+
+        // console.info(`${message} - ${fqn} - ${time} ms (${iterations} iterations)`)
+        results.push({ message, fqn, time, iterations })
+        time.should.be.closeTo(expectedTime, deltaError)
+      })
+    }
+
+    benchmark('empty', 6)
+    benchmark('visuals_1', 4)
+    benchmark('visuals_100', 4)
+    benchmark('ticks_1', 11)
+    benchmark('ticks_100', 637)
+    benchmark('onCollide_1', 11)
+    benchmark('onCollide_100', 675)
+
+  })
+})
+
+async function measure(programFQN: string, message: string): Promise<number> {
+  const environment = await buildEnvironment(`**/*.${PROGRAM_FILE_EXTENSION}`, resolve('language', 'benchmarks'))
+  const interpreter = interpret(environment, natives)
+
+  interpreter.run(programFQN)
+  const game = interpreter.object('wollok.game.game')
+
+  interpreter.send(message, game, interpreter.reify(0)) // Fill caches
+  const startTime = performance.now()
+  for (let ms = 1; ms < 10; ms++) 
+    interpreter.send(message, game, interpreter.reify(ms))
+  const endTime = performance.now()
+
+  const elapsedTime = endTime - startTime
+  return elapsedTime
+}