perf: defer Traceback import in logging.py to reduce RichHandler import time

Move the module-level `from .traceback import Traceback` to a lazy
import inside `emit()`, guarded by the `rich_tracebacks` check. This
avoids loading the traceback -> syntax -> pygments chain (~20ms) when
RichHandler is used without rich tracebacks enabled (the default).

The Traceback type annotation in `render()` is changed to a string
literal for forward-reference compatibility.

Author: KRRT7

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+
+- Defer import of Traceback in logging.py to reduce RichHandler import time by ~20ms
+
 ## [14.3.3] - 2026-02-19
 
 ### Fixed

CONTRIBUTORS.md

@@ -100,3 +100,4 @@ The following people have contributed to the development of Rich:
 - [Brandon Capener](https://github.com/bcapener)
 - [Alex Zheng](https://github.com/alexzheng111)
 - [Sebastian Speitel](https://github.com/SebastianSpeitel)
+- [Kevin Turcios](https://github.com/KRRT7)

rich/logging.py

@@ -3,7 +3,10 @@
 from logging import Handler, LogRecord
 from pathlib import Path
 from types import ModuleType
-from typing import ClassVar, Iterable, List, Optional, Type, Union
+from typing import TYPE_CHECKING, ClassVar, Iterable, List, Optional, Type, Union
+
+if TYPE_CHECKING:
+    from .traceback import Traceback
 
 from rich._null_file import NullFile
 
@@ -12,7 +15,6 @@
 from .console import Console, ConsoleRenderable
 from .highlighter import Highlighter, ReprHighlighter
 from .text import Text
-from .traceback import Traceback
 
 
 class RichHandler(Handler):
@@ -141,6 +143,8 @@ def emit(self, record: LogRecord) -> None:
             exc_type, exc_value, exc_traceback = record.exc_info
             assert exc_type is not None
             assert exc_value is not None
+            from .traceback import Traceback
+
             traceback = Traceback.from_exception(
                 exc_type,
                 exc_value,
@@ -208,7 +212,7 @@ def render(
         self,
         *,
         record: LogRecord,
-        traceback: Optional[Traceback],
+        traceback: Optional["Traceback"],
         message_renderable: "ConsoleRenderable",
     ) -> "ConsoleRenderable":
         """Render log for display.