Faster Update (#148)

* stash

* stash

* add std err in add and trace progress

* fix.

* docs

* style: format

* docs

* better figs

* better figs

* update results

* fotmat

---------

Co-authored-by: yichuan-w <yichuan-w@users.noreply.github.com>

benchmarks/update/__init__.py

@@ -0,0 +1,16 @@
+"""Benchmarks for LEANN update workflows."""
+
+# Expose helper to locate repository root for other modules that need it.
+from pathlib import Path
+
+
+def find_repo_root() -> Path:
+    """Return the project root containing pyproject.toml."""
+    current = Path(__file__).resolve()
+    for parent in current.parents:
+        if (parent / "pyproject.toml").exists():
+            return parent
+    return current.parents[1]
+
+
+__all__ = ["find_repo_root"]