Upload main.py

app/main.py

@@ -49,18 +49,28 @@ async def convert_file(request: Request, file: UploadFile = File(...)):
 
     # Unique ID for request
     request_id = str(uuid.uuid4())
-    tmp_dir = tempfile.mkdtemp()
+    
+    # PERFORMANCE HACK: Use /dev/shm (RAM Disk) if available for extreme speed
+    # This avoids writing the input file to the slow container disk
+    ram_disk = "/dev/shm"
+    if os.path.exists(ram_disk) and os.access(ram_disk, os.W_OK):
+        base_tmp_dir = ram_disk
+    else:
+        base_tmp_dir = None # Default to /tmp handling
+        
+    tmp_dir = tempfile.mkdtemp(dir=base_tmp_dir)
     
     try:
-        # Save uploaded file to temp dir
+        # Save uploaded file to temp dir (RAM)
         input_path = os.path.join(tmp_dir, file.filename)
         with open(input_path, "wb") as buffer:
             shutil.copyfileobj(file.file, buffer)
         
-        # Convert to PDF (using hot listener)
+        # Convert to PDF (Reading/Writing from RAM)
         pdf_path = convert_to_pdf(input_path, tmp_dir)
         
-        # Move final PDF to public static dir
+        # Move final PDF to public static dir (Disk)
+        # Only the final result touches the persistent disk
         final_filename = f"{request_id}_{os.path.basename(pdf_path)}"
         final_path = PDF_DIR / final_filename
         shutil.move(pdf_path, final_path)