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sourmash-bio · Jul 4, 2021 · 5b02dce · 5b02dce
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diff --git a/src/sourmash/index.py b/src/sourmash/index.py
@@ -1006,6 +1006,10 @@ class DirectoryIndex(Index):
 
     Concrete class; signatures dynamically loaded from disk; uses manifests.
 
+    This is useful for situations where you have many existing .sig files
+    under a directory hierarchy. If you convert them to .zip collections
+    then you can use LazyMultiIndex instead.
+
     Notes:
     * manifests for directories are _generated_ by MultiIndex :grin: :shrug:
     * Lazy - loads signatures only when requested