diff --git "a/\345\274\240\347\247\200\350\212\263/3.02\344\275\234\344\270\232/demo01.js" "b/\345\274\240\347\247\200\350\212\263/3.02\344\275\234\344\270\232/demo01.js"
new file mode 100644
index 0000000000000000000000000000000000000000..612f503453448300c53d3b560836d2972e6e4d15
--- /dev/null
+++ "b/\345\274\240\347\247\200\350\212\263/3.02\344\275\234\344\270\232/demo01.js"
@@ -0,0 +1,25 @@
+let fs = require("fs");
+let os = require('os');
+let start = os.freemem();
+let fd = fs.openSync('1.txt','w');
+for(let k=0;k<50000;k++){
+    fs.writeFileSync('big01.txt','大文件\n',{flag:'a'});
+}
+fs.closeSync(fd);
+let end = os.freemem();
+console.log((start-end)/1024/1024);
+fs.closeSync(fd);
+
+//流
+
+
+let startMes1 = os.freemem();
+let writeStream=fs.createWriteStream('big02.txt',{flag:'a'});
+
+for(let n=0;n<50000;n++){
+    writeStream.write('大文件\n')
+}
+writeStream.close();
+
+let endMes1 = os.freemem();
+console.log((startMes1 - endMes1) / 1024 / 1024);
\ No newline at end of file
diff --git "a/\345\274\240\347\247\200\350\212\263/3.03\344\275\234\344\270\232/homework.js" "b/\345\274\240\347\247\200\350\212\263/3.03\344\275\234\344\270\232/homework.js"
new file mode 100644
index 0000000000000000000000000000000000000000..d43533c5be0b1a2085415e712c588a66d4817e8d
--- /dev/null
+++ "b/\345\274\240\347\247\200\350\212\263/3.03\344\275\234\344\270\232/homework.js"
@@ -0,0 +1,14 @@
+
+ let http = require("http");
+ let fs = require("fs");
+ let server=http.createServer();
+ server.on('request', (req, res) => {   
+     let url = req.url;
+     if(url.indexOf("page")!=-1){
+         let page=url.split("?")[1].split('=')[1]
+         let bf=fs.readFileSync('./html/'+page+'.txt');
+         res.write(bf);
+     }
+     res.end();
+ });
+ server.listen(80);
\ No newline at end of file