Document complexity of min_len_unique_id. (#434)

* Add a note about the runtime complexity of min_len_unique_id.

* Don't use min_len_unique_id in signac find.

* Use min_len_unique_id if needed.

* Update signac/contrib/project.py

signac/__main__.py

@@ -373,7 +373,10 @@ def main_find(args):
     """Handle find subcommand."""
     project = get_project()
 
-    len_id = max(6, project.min_len_unique_id())
+    len_id = 6
+    if args.one_line:
+        # Only get the project's minimum length of unique id if it is needed.
+        len_id = max(len_id, project.min_len_unique_id())
 
     # --show = --sp --doc --pretty 3
     # if --sp or --doc are also specified, those subsets of keys will be used
@@ -387,7 +390,7 @@ def format_lines(cat, _id, s):
         if args.one_line:
             if isinstance(s, dict):
                 s = json.dumps(s, sort_keys=True)
-            return _id[:len_id] + " " + cat + "\t" + s
+            return f"{_id[:len_id]} {cat}\t{s}"
         else:
             return pformat(s, depth=args.pretty)
 

signac/contrib/project.py

@@ -410,6 +410,9 @@ def _check_schema_compatibility(self):
     def min_len_unique_id(self):
         """Determine the minimum length required for a job id to be unique.
 
+        This method's runtime scales with the number of jobs in the
+        workspace.
+
         Returns
         -------
         int