Limit cache key in cell_len to 512

Textualize · Mar 14, 2022 · c4cf06d · c4cf06d
1 parent eed6cbf
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diff --git a/CHANGELOG.md b/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
+
+- Improve performance of cell_length https://github.com/Textualize/rich/pull/2061
+
 ## [12.0.1] - 2022-03-14
 
 ### Fixed

diff --git a/rich/cells.py b/rich/cells.py
@@ -24,7 +24,8 @@ def cell_len(text: str, _cache: Dict[str, int] = LRUCache(1024 * 4)) -> int:
 
     _get_size = get_character_cell_size
     total_size = sum(_get_size(character) for character in text)
-    _cache[text] = total_size
+    if len(text) <= 512:
+        _cache[text] = total_size
     return total_size