diff --git a/playground/playground.ts b/playground/playground.ts
index 1d5221b..927715f 100644
--- a/playground/playground.ts
+++ b/playground/playground.ts
@@ -5,6 +5,7 @@ import {
     withResolvers,
     yieldOrContinue,
 } from '../index'
+import simulateWork from './utils/simulateWork'
 
 document.querySelector('#run-interactive')!.addEventListener('click', () => {
     run('interactive')
@@ -88,54 +89,12 @@ async function runQueueTask(time: number = 1000) {
     }
 }
 
-function simulateWork(): void {
-    // a 5x5 matrix
-    const matrixA = [
-        [1, 2, 3, 4, 5],
-        [4, 5, 6, 7, 8],
-        [7, 8, 9, 10, 11],
-        [7, 8, 9, 10, 11],
-        [7, 8, 9, 10, 11],
-    ]
-    const matrixB = [
-        [1, 2, 3, 4, 5],
-        [4, 5, 6, 7, 8],
-        [7, 8, 9, 10, 11],
-        [7, 8, 9, 10, 11],
-        [7, 8, 9, 10, 11],
-    ]
-    for (let i = 0; i < 5000; i++) {
-        matrixMultiplication(matrixA, matrixB)
-    }
-}
-
-function matrixMultiplication(matrix1: number[][], matrix2: number[][]) {
-    const result = []
-    const rows1 = matrix1.length
-    const cols1 = matrix1[0]!.length
-    const cols2 = matrix2[0]!.length
-
-    for (let i = 0; i < rows1; i++) {
-        result[i] = []
-        for (let j = 0; j < cols2; j++) {
-            // @ts-ignore
-            result[i][j] = 0
-            for (let k = 0; k < cols1; k++) {
-                // @ts-ignore
-                result[i][j] += matrix1[i][k] * matrix2[k][j]
-            }
-        }
-    }
-
-    return result
-}
-
 async function postTaskVsYieldOrContinue() {
     {
         const start = performance.now()
         let count = 0
         while (performance.now() - start < 1000) {
-            await postTask()
+            await waitPostTask()
             count++
         }
         console.log(count.toString(), '→ postTask()')
@@ -160,7 +119,9 @@ async function postTaskVsYieldOrContinue() {
     }
 }
 
-async function postTask(priority?: 'user-blocking' | 'user-visible' | 'background'): Promise<void> {
+async function waitPostTask(
+    priority?: 'user-blocking' | 'user-visible' | 'background',
+): Promise<void> {
     const { promise, resolve } = withResolvers()
     // @ts-ignore
     scheduler.postTask(
diff --git a/playground/utils/simulateWork.ts b/playground/utils/simulateWork.ts
new file mode 100644
index 0000000..b45713d
--- /dev/null
+++ b/playground/utils/simulateWork.ts
@@ -0,0 +1,41 @@
+export default function simulateWork(): void {
+    // a 5x5 matrix
+    const matrixA = [
+        [1, 2, 3, 4, 5],
+        [4, 5, 6, 7, 8],
+        [7, 8, 9, 10, 11],
+        [7, 8, 9, 10, 11],
+        [7, 8, 9, 10, 11],
+    ]
+    const matrixB = [
+        [1, 2, 3, 4, 5],
+        [4, 5, 6, 7, 8],
+        [7, 8, 9, 10, 11],
+        [7, 8, 9, 10, 11],
+        [7, 8, 9, 10, 11],
+    ]
+    for (let i = 0; i < 5000; i++) {
+        matrixMultiplication(matrixA, matrixB)
+    }
+}
+
+function matrixMultiplication(matrix1: number[][], matrix2: number[][]) {
+    const result = []
+    const rows1 = matrix1.length
+    const cols1 = matrix1[0]!.length
+    const cols2 = matrix2[0]!.length
+
+    for (let i = 0; i < rows1; i++) {
+        result[i] = []
+        for (let j = 0; j < cols2; j++) {
+            // @ts-ignore
+            result[i][j] = 0
+            for (let k = 0; k < cols1; k++) {
+                // @ts-ignore
+                result[i][j] += matrix1[i][k] * matrix2[k][j]
+            }
+        }
+    }
+
+    return result
+}