diff --git a/apps/performance/memoized/.eslintrc.json b/apps/performance/memoized/.eslintrc.json
new file mode 100644
index 0000000..bf8df14
--- /dev/null
+++ b/apps/performance/memoized/.eslintrc.json
@@ -0,0 +1,36 @@
+{
+  "extends": ["../../../.eslintrc.json"],
+  "ignorePatterns": ["!**/*"],
+  "overrides": [
+    {
+      "files": ["*.ts"],
+      "rules": {
+        "@angular-eslint/directive-selector": [
+          "error",
+          {
+            "type": "attribute",
+            "prefix": "app",
+            "style": "camelCase"
+          }
+        ],
+        "@angular-eslint/component-selector": [
+          "error",
+          {
+            "type": "element",
+            "prefix": "app",
+            "style": "kebab-case"
+          }
+        ]
+      },
+      "extends": [
+        "plugin:@nx/angular",
+        "plugin:@angular-eslint/template/process-inline-templates"
+      ]
+    },
+    {
+      "files": ["*.html"],
+      "extends": ["plugin:@nx/angular-template"],
+      "rules": {}
+    }
+  ]
+}
diff --git a/apps/performance/memoized/README.md b/apps/performance/memoized/README.md
new file mode 100644
index 0000000..f16afc0
--- /dev/null
+++ b/apps/performance/memoized/README.md
@@ -0,0 +1,32 @@
+<h1>memoized function</h1>
+
+> Author: Thomas Laforge
+
+<!-- TODO: add Information/Statement/Rules/Constraint/Steps -->
+
+### Information
+
+### Statement
+
+### Step 1
+
+### Step 2
+
+### Constraints:
+
+### Submitting your work
+
+1. Fork the project
+2. clone it
+3. npm ci
+4. `npx nx serve memoized`
+5. _...work on it_
+6. Commit your work
+7. Submit a PR with a title beginning with **Answer:35** that I will review and other dev can review.
+
+<a href="https://github.com/tomalaforge/angular-challenges/pulls?q=label%3A35+label%3Aanswer"><img src="https://img.shields.io/badge/-Solutions-green" alt="memoized"/></a>
+<a href='https://github.com/tomalaforge/angular-challenges/pulls?q=label%3A35+label%3A"answer+author"'><img src="https://img.shields.io/badge/-Author solution-important" alt="memoized solution author"/></a>
+
+<!-- <a href="{Blog post url}" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/badge/-Blog post explanation-blue" alt="memoized blog article"/></a>  -->
+
+_You can ask any question on_ <a href="https://twitter.com/laforge_toma" target="_blank" rel="noopener noreferrer"><img src="./../../logo/twitter.svg" height=20px alt="twitter"/></a>
diff --git a/apps/performance/memoized/project.json b/apps/performance/memoized/project.json
new file mode 100644
index 0000000..5b8da20
--- /dev/null
+++ b/apps/performance/memoized/project.json
@@ -0,0 +1,85 @@
+{
+  "name": "performance-memoized",
+  "$schema": "../../../node_modules/nx/schemas/project-schema.json",
+  "projectType": "application",
+  "prefix": "app",
+  "sourceRoot": "apps/performance/memoized/src",
+  "tags": [],
+  "targets": {
+    "build": {
+      "executor": "@angular-devkit/build-angular:browser",
+      "outputs": ["{options.outputPath}"],
+      "options": {
+        "outputPath": "dist/apps/performance/memoized",
+        "index": "apps/performance/memoized/src/index.html",
+        "main": "apps/performance/memoized/src/main.ts",
+        "polyfills": ["zone.js"],
+        "tsConfig": "apps/performance/memoized/tsconfig.app.json",
+        "assets": [
+          "apps/performance/memoized/src/favicon.ico",
+          "apps/performance/memoized/src/assets"
+        ],
+        "styles": [
+          "apps/performance/memoized/src/styles.scss",
+          "./node_modules/@angular/material/prebuilt-themes/indigo-pink.css"
+        ],
+        "scripts": [],
+        "allowedCommonJsDependencies": ["seedrandom"]
+      },
+      "configurations": {
+        "production": {
+          "budgets": [
+            {
+              "type": "initial",
+              "maximumWarning": "500kb",
+              "maximumError": "1mb"
+            },
+            {
+              "type": "anyComponentStyle",
+              "maximumWarning": "2kb",
+              "maximumError": "4kb"
+            }
+          ],
+          "outputHashing": "all"
+        },
+        "development": {
+          "buildOptimizer": false,
+          "optimization": false,
+          "vendorChunk": true,
+          "extractLicenses": false,
+          "sourceMap": true,
+          "namedChunks": true
+        }
+      },
+      "defaultConfiguration": "production"
+    },
+    "serve": {
+      "executor": "@angular-devkit/build-angular:dev-server",
+      "configurations": {
+        "production": {
+          "browserTarget": "performance-memoized:build:production"
+        },
+        "development": {
+          "browserTarget": "performance-memoized:build:development"
+        }
+      },
+      "defaultConfiguration": "development"
+    },
+    "extract-i18n": {
+      "executor": "@angular-devkit/build-angular:extract-i18n",
+      "options": {
+        "browserTarget": "performance-memoized:build"
+      }
+    },
+    "lint": {
+      "executor": "@nx/linter:eslint",
+      "outputs": ["{options.outputFile}"],
+      "options": {
+        "lintFilePatterns": [
+          "apps/performance/memoized/**/*.ts",
+          "apps/performance/memoized/**/*.html"
+        ]
+      }
+    }
+  }
+}
diff --git a/apps/performance/memoized/src/app/app.component.ts b/apps/performance/memoized/src/app/app.component.ts
new file mode 100644
index 0000000..01d0493
--- /dev/null
+++ b/apps/performance/memoized/src/app/app.component.ts
@@ -0,0 +1,28 @@
+import { NgIf } from '@angular/common';
+import { Component } from '@angular/core';
+import { generateList } from './generateList';
+import { PersonListComponent } from './person-list.component';
+
+@Component({
+  standalone: true,
+  imports: [PersonListComponent, NgIf],
+  selector: 'app-root',
+  template: `
+    <p>Performance is key!!</p>
+    <button
+      (click)="loadList = true"
+      class="border border-black p-2 rounded-md">
+      Load List
+    </button>
+
+    <app-person-list
+      *ngIf="loadList"
+      class="max-w-2xl"
+      [persons]="persons"
+      title="Persons" />
+  `,
+})
+export class AppComponent {
+  persons = generateList();
+  loadList = false;
+}
diff --git a/apps/performance/memoized/src/app/app.config.ts b/apps/performance/memoized/src/app/app.config.ts
new file mode 100644
index 0000000..59198e6
--- /dev/null
+++ b/apps/performance/memoized/src/app/app.config.ts
@@ -0,0 +1,6 @@
+import { ApplicationConfig } from '@angular/core';
+import { provideAnimations } from '@angular/platform-browser/animations';
+
+export const appConfig: ApplicationConfig = {
+  providers: [provideAnimations()],
+};
diff --git a/apps/performance/memoized/src/app/generateList.ts b/apps/performance/memoized/src/app/generateList.ts
new file mode 100644
index 0000000..62978ec
--- /dev/null
+++ b/apps/performance/memoized/src/app/generateList.ts
@@ -0,0 +1,15 @@
+import { randFirstName, randNumber } from '@ngneat/falso';
+import { Person } from './person.model';
+
+export function generateList() {
+  const arr: Person[] = [];
+
+  for (let i = 0; i < 100; i++) {
+    arr.push({
+      name: randFirstName(),
+      fib: randNumber({ min: 25, max: 30, precision: 1 }),
+    });
+  }
+
+  return arr;
+}
diff --git a/apps/performance/memoized/src/app/person-list.component.ts b/apps/performance/memoized/src/app/person-list.component.ts
new file mode 100644
index 0000000..1f8ae15
--- /dev/null
+++ b/apps/performance/memoized/src/app/person-list.component.ts
@@ -0,0 +1,64 @@
+import { Component, Input } from '@angular/core';
+
+import { CommonModule } from '@angular/common';
+import { FormsModule } from '@angular/forms';
+import { MatChipsModule } from '@angular/material/chips';
+import { MatFormFieldModule } from '@angular/material/form-field';
+import { MatInputModule } from '@angular/material/input';
+import { MatListModule } from '@angular/material/list';
+import { Person } from './person.model';
+
+const fibonacci = (num: number): number => {
+  if (num === 1 || num === 2) {
+    return 1;
+  }
+  return fibonacci(num - 1) + fibonacci(num - 2);
+};
+
+@Component({
+  selector: 'app-person-list',
+  standalone: true,
+  imports: [
+    CommonModule,
+    FormsModule,
+    MatListModule,
+    MatFormFieldModule,
+    MatInputModule,
+    MatChipsModule,
+  ],
+  template: `
+    <h1 class="font-semibold text-center" title="Title">
+      {{ title | titlecase }}
+    </h1>
+
+    <mat-form-field class="w-4/5">
+      <input
+        placeholder="Add one member to the list"
+        matInput
+        type="text"
+        [(ngModel)]="label" />
+    </mat-form-field>
+
+    <mat-list class="flex w-full">
+      <mat-list-item *ngFor="let person of persons">
+        <div MatListItemLine class="flex justify-between">
+          <h3>{{ person.name }}</h3>
+          <mat-chip> {{ calculate(person.fib) }} </mat-chip>
+        </div>
+      </mat-list-item>
+    </mat-list>
+  `,
+  host: {
+    class: 'w-full flex flex-col items-center',
+  },
+})
+export class PersonListComponent {
+  @Input() persons: Person[] = [];
+  @Input() title = '';
+
+  label = '';
+
+  calculate(num: number) {
+    return fibonacci(num);
+  }
+}
diff --git a/apps/performance/memoized/src/app/person.model.ts b/apps/performance/memoized/src/app/person.model.ts
new file mode 100644
index 0000000..cac730d
--- /dev/null
+++ b/apps/performance/memoized/src/app/person.model.ts
@@ -0,0 +1,4 @@
+export interface Person {
+  name: string;
+  fib: number;
+}
diff --git a/apps/performance/memoized/src/assets/.gitkeep b/apps/performance/memoized/src/assets/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/apps/performance/memoized/src/favicon.ico b/apps/performance/memoized/src/favicon.ico
new file mode 100644
index 0000000..317ebcb
Binary files /dev/null and b/apps/performance/memoized/src/favicon.ico differ
diff --git a/apps/performance/memoized/src/index.html b/apps/performance/memoized/src/index.html
new file mode 100644
index 0000000..459031f
--- /dev/null
+++ b/apps/performance/memoized/src/index.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>performance-memoized</title>
+    <base href="/" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="icon" type="image/x-icon" href="favicon.ico" />
+  </head>
+  <body>
+    <app-root></app-root>
+  </body>
+</html>
diff --git a/apps/performance/memoized/src/main.ts b/apps/performance/memoized/src/main.ts
new file mode 100644
index 0000000..514c89a
--- /dev/null
+++ b/apps/performance/memoized/src/main.ts
@@ -0,0 +1,7 @@
+import { bootstrapApplication } from '@angular/platform-browser';
+import { appConfig } from './app/app.config';
+import { AppComponent } from './app/app.component';
+
+bootstrapApplication(AppComponent, appConfig).catch((err) =>
+  console.error(err)
+);
diff --git a/apps/performance/memoized/src/styles.scss b/apps/performance/memoized/src/styles.scss
new file mode 100644
index 0000000..77e408a
--- /dev/null
+++ b/apps/performance/memoized/src/styles.scss
@@ -0,0 +1,5 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+/* You can add global styles to this file, and also import other style files */
diff --git a/apps/performance/memoized/tailwind.config.js b/apps/performance/memoized/tailwind.config.js
new file mode 100644
index 0000000..38183db
--- /dev/null
+++ b/apps/performance/memoized/tailwind.config.js
@@ -0,0 +1,14 @@
+const { createGlobPatternsForDependencies } = require('@nx/angular/tailwind');
+const { join } = require('path');
+
+/** @type {import('tailwindcss').Config} */
+module.exports = {
+  content: [
+    join(__dirname, 'src/**/!(*.stories|*.spec).{ts,html}'),
+    ...createGlobPatternsForDependencies(__dirname),
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+};
diff --git a/apps/performance/memoized/tsconfig.app.json b/apps/performance/memoized/tsconfig.app.json
new file mode 100644
index 0000000..5822042
--- /dev/null
+++ b/apps/performance/memoized/tsconfig.app.json
@@ -0,0 +1,10 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../../dist/out-tsc",
+    "types": []
+  },
+  "files": ["src/main.ts"],
+  "include": ["src/**/*.d.ts"],
+  "exclude": ["jest.config.ts", "src/**/*.test.ts", "src/**/*.spec.ts"]
+}
diff --git a/apps/performance/memoized/tsconfig.editor.json b/apps/performance/memoized/tsconfig.editor.json
new file mode 100644
index 0000000..4ee6393
--- /dev/null
+++ b/apps/performance/memoized/tsconfig.editor.json
@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "include": ["src/**/*.ts"],
+  "compilerOptions": {
+    "types": []
+  }
+}
diff --git a/apps/performance/memoized/tsconfig.json b/apps/performance/memoized/tsconfig.json
new file mode 100644
index 0000000..51c7908
--- /dev/null
+++ b/apps/performance/memoized/tsconfig.json
@@ -0,0 +1,29 @@
+{
+  "compilerOptions": {
+    "target": "es2022",
+    "useDefineForClassFields": false,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "files": [],
+  "include": [],
+  "references": [
+    {
+      "path": "./tsconfig.app.json"
+    },
+    {
+      "path": "./tsconfig.editor.json"
+    }
+  ],
+  "extends": "../../../tsconfig.base.json",
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  }
+}