diff --git "a/\346\237\257\345\260\217\346\226\214/20220218/.keep" "b/\346\237\257\345\260\217\346\226\214/20220218/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\346\237\257\345\260\217\346\226\214/20220218/demo.js" "b/\346\237\257\345\260\217\346\226\214/20220218/demo.js"
new file mode 100644
index 0000000000000000000000000000000000000000..6efcaffef921ed831f13de9e60fa082f1bd09303
--- /dev/null
+++ "b/\346\237\257\345\260\217\346\226\214/20220218/demo.js"
@@ -0,0 +1,23 @@
+let fs = require("fs");
+if (!fs.existsSync("xxx")) fs.mkdirSync("xxx");
+let time = new Date().getTime();
+for (let i = 0; i < 1000; i++) {
+    fs.writeFileSync("xxx"+i+".txt","666")
+}
+let time2 = new Date().getTime();
+console.log(time2-time);
+
+let time3 = new Date().getTime();
+let dream = 0;
+if (!fs.existsSync("xxx")) fs.mkdirSync("xxx");
+for (let j = 0; j < 2000; j++) {
+    fs.writeFile("xxx"+j+".txt","666",(err) => {
+        dream++;
+        if (dream == 2000) {
+            let time4 = new Date().getTime();
+            console.log(time4-time3);
+        }
+    })
+}
+
+