Add performance measurement to file processing

Refactored the file handling function to include processing time measurement. Now, the exact time it takes to process an uploaded file is being captured and displayed in console logs. This allows for useful insights into the execution duration, potentially highlighting areas for optimization in the file processing methods. No functional changes are introduced with this update.

Author: 0xMax42

src/App.ts

@@ -48,22 +48,33 @@ export default class App {
         }
     }
 
-    /**
-     * Handles the file upload event.
-     * @param event - The file upload event.
-     */
-    private async handleFileUpload(event: Event): Promise<void> {
-        const input = event.target as HTMLInputElement;
-        if (input.files && input.files.length > 0) {
-            const file = input.files[0];
-            this.hideFileInput();
-            this.showLoadingSpinner();
-            await this.processFile(file);
-            this.hideLoadingSpinner();
-            this.showSuccessMessage(this.showFileInput.bind(this));
-            input.value = ''; // Clear the input field
-        }
+/**
+ * Handles the file upload event.
+ * @param event - The file upload event.
+ */
+private async handleFileUpload(event: Event): Promise<void> {
+    const input = event.target as HTMLInputElement;
+    if (input.files && input.files.length > 0) {
+        const file = input.files[0];
+        this.hideFileInput();
+        this.showLoadingSpinner();
+
+        const startTime = performance.now(); // Start time measurement
+        await this.processFile(file);
+        const endTime = performance.now(); // End time measurement
+
+        this.hideLoadingSpinner();
+        this.showSuccessMessage(this.showFileInput.bind(this));
+        input.value = ''; // Clear the input field
+
+        const processingTime = (endTime - startTime) / 1000;
+        const seconds = Math.floor(processingTime);
+        const milliseconds = Math.floor((processingTime - seconds) * 1000);
+
+        console.info(`File processing time: ${seconds} seconds and ${milliseconds} milliseconds`);
     }
+}
+
 
     /**
      * Processes the uploaded file.