diff --git a/ROADMAP.md b/ROADMAP.md
index 085067d..bcc6b63 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -17,3 +17,4 @@
 - [ ] add multi apply/batch_apply
 - [ ] add batch vector operations
 - [ ] add inplace vector operations
+- [ ] cache chunk lists in batch operations