diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index a9186ee8b..35c3ac8d5 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -156,9 +156,9 @@ class Coder:
             lines.append(f"Git repo: {rel_repo_dir} with {num_files:,} files")
             if num_files > 1000:
                 lines.append(
-                    "Warning: For large repos, consider using an .aiderignore file to ignore"
-                    " irrelevant files/dirs."
+                    "Warning: For large repos, consider using --subtree-only and .aiderignore"
                 )
+                lines.append(f"See: {urls.large_repos}")
         else:
             lines.append("Git repo: none")
 
diff --git a/aider/repomap.py b/aider/repomap.py
index b47bf6023..c7b2629fb 100644
--- a/aider/repomap.py
+++ b/aider/repomap.py
@@ -260,10 +260,16 @@ class RepoMap:
         personalize = 100 / len(fnames)
 
         if len(fnames) - len(self.TAGS_CACHE) > 100:
-            fnames = tqdm(fnames, desc="Scanning files")
+            self.io.tool_output(
+                "Initial repo scan can be slow in larger repos, but only happens once."
+            )
+            fnames = tqdm(fnames, desc="Scanning repo")
+            showing_bar = True
+        else:
+            showing_bar = False
 
         for fname in fnames:
-            if progress:
+            if progress and not showing_bar:
                 progress()
 
             if not Path(fname).is_file():
@@ -293,9 +299,6 @@ class RepoMap:
                 continue
 
             for tag in tags:
-                if progress:
-                    progress()
-
                 if tag.kind == "def":
                     defines[tag.name].add(rel_fname)
                     key = (rel_fname, tag.name)
diff --git a/aider/urls.py b/aider/urls.py
index 8e21742d3..24e830766 100644
--- a/aider/urls.py
+++ b/aider/urls.py
@@ -7,3 +7,4 @@ favicon = "https://aider.chat/assets/icons/favicon-32x32.png"
 model_warnings = "https://aider.chat/docs/llms/warnings.html"
 token_limits = "https://aider.chat/docs/troubleshooting/token-limits.html"
 llms = "https://aider.chat/docs/llms.html"
+large_repos = "https://aider.chat/docs/faq.html#can-i-use-aider-in-a-large-mono-repo"