faster than inspect

src/textual/__init__.py

@@ -54,7 +54,10 @@ class Logger:
             raise LoggerError("Unable to log without an active app.") from None
         if not app.devtools.is_connected:
             return
-        caller = inspect.stack(0)[1]
+
+        previous_frame = inspect.currentframe().f_back
+        caller = inspect.getframeinfo(previous_frame)
+
         _log = self._log or app._log
         try:
             _log(

src/textual/devtools/redirect_output.py

@@ -39,7 +39,9 @@ class StdoutRedirector:
         if not self.devtools.is_connected:
             return
 
-        caller = inspect.stack(0)[1]
+        previous_frame = inspect.currentframe().f_back
+        caller = inspect.getframeinfo(previous_frame)
+
         self._buffer.append(DevtoolsLog(string, caller=caller))
 
         # By default, `print` adds a "\n" suffix which results in a buffer