diff --git a/files/homework.js b/files/homework.js
new file mode 100644
index 0000000000000000000000000000000000000000..4959b57d63f62e35c9dba008551eb4867f0f49d2
--- /dev/null
+++ b/files/homework.js
@@ -0,0 +1,41 @@
+'use strict';
+let fs = require("fs");
+let StartTime = new Date().getTime();
+if(!fs.existsSync("tb1")) fs.mkdirSync("tb1");
+for (let i = 1; i < 1001; i++) {
+    fs.writeFileSync("./tb1/" + i + ".txt", "hello");
+}
+let EndTime = new Date().getTime();
+console.log("同步耗时为" + (EndTime - StartTime));
+//异步耗时
+var StartTime1 = new Date().getTime();
+if(!fs.existsSync("tb2")) fs.mkdirSync("tb2");
+
+var Maxnum = 0;
+for (var i = 1; i < 1001; i++) {
+    fs.writeFile("./tb2/" + i + ".txt", "hi", (err, data) => {
+        var EndTime1 = new Date().getTime();
+        if (Maxnum < (EndTime1 - StartTime1)) {
+            Maxnum = (EndTime1 - StartTime1);
+        }
+    });
+
+}
+
+setTimeout(function () {
+    console.log("异步耗时为：" + Maxnum);
+}, 2000)
+for (var a = 1; a < 1001; a++) {
+    fs.readFile("./tb1/" + a + ".txt", 'utf-8', (err, data) => {
+        console.log(data.toString());
+    })
+    fs.readFile("./tb1/" + a + ".txt", 'ascii', (err, data) => {
+        console.log(data.toString());
+    })
+    fs.readFile("./tb2/" + a + ".txt", 'utf-8', (err, data) => {
+        console.log(data.toString());
+    })
+    fs.readFile("./tb2/" + a + ".txt", 'ascii', (err, data) => {
+        console.log(data.toString());
+    })
+}
\ No newline at end of file