perf(metadata):cache reading of frequently-accesses lists

Author: grololo06

src/ZooProcess_lib/ZooscanFolder.py

@@ -1,6 +1,7 @@
 import os
 import re
 from datetime import datetime
+from functools import lru_cache
 from os import DirEntry
 from pathlib import Path
 from typing import List, Tuple, Union, Dict, TypedDict, Optional, Generator
@@ -72,6 +73,9 @@ def list_samples_with_state(self) -> list[str]:
         except (FileNotFoundError, KeyError):
             return []
 
+    @lru_cache(
+        maxsize=1
+    )  # For speed. TODO: A dedicated primitive, with _real_ state, i.e. progress in workflow of the scan
     def list_scans_with_state(self) -> Generator[str, None, None]:
         """Inventory done using:
         zooscan_lov/Zooscan_apero_tha_bioness_2_sn033$ find . -name "apero2023_tha_bioness_013_st46_d_n4_d2_2_sur_2*" | sort

src/ZooProcess_lib/tools.py

@@ -2,6 +2,7 @@
 import os
 import sys
 import time
+from functools import lru_cache
 from pathlib import Path
 from typing import Callable, Any, Tuple, List, Dict
 
@@ -72,9 +73,9 @@ def create_folder(path: Path):
         eprint("cannot create folder: ", path_str, ", ", str(error))
 
 
+@lru_cache(maxsize=2)  # Keep last sample and last scan
 def parse_csv(file_path: Path) -> List[Dict[str, str]]:
     """Parses a CSV file and returns a list of dictionaries."""
-
     data: List[Dict[str, str]] = []
     with open(file_path, "r", newline="", encoding="ISO-8859-1") as csv_file:
         reader = csv.DictReader(csv_file, delimiter=";")