diff --git a/README.md b/README.md
index 4110209b..184a8f6b 100644
--- a/README.md
+++ b/README.md
@@ -106,6 +106,10 @@ may want to add an index. For that, you sould do so:
     ALTER FUNCTION to_tsvector(text) IMMUTABLE;
     CREATE INDEX search_idx ON leaflet_storage_map USING gin(to_tsvector(unaccent(name)), share_status);
 
+To speep up umap home page rendering on large instance, the following index can be added too (make sure you set the center to your default instance map center):
+
+    CREATE INDEX leaflet_storage_map_optim ON leaflet_storage_map (modified_at) WHERE ("leaflet_storage_map"."share_status" = 1 AND ST_Distance("leaflet_storage_map"."center", ST_GeomFromEWKT('SRID=4326;POINT(2 51)')) > 1000.0);
+    
 ## Translating
 
 Everything is managed through Transifex: https://www.transifex.com/projects/p/umap/