Merge pull request #24410 from ankush/perf_fieldname

perf: cache fieldname extraction

frappe/desk/reportview.py

@@ -4,6 +4,7 @@
 """build query for doclistview and return results"""
 
 import json
+from functools import lru_cache
 
 from sql_metadata import Parser
 
@@ -178,6 +179,7 @@ def is_standard(fieldname):
 	)
 
 
+@lru_cache
 def extract_fieldnames(field):
 	parser = Parser(f"select {field}, _frappe_dummy from _dummy")
 	columns = [col for col in parser.columns if col != "_frappe_dummy"]