diff --git a/src/components/Map/usePostsEngine.js b/src/components/Map/usePostsEngine.js
index 1608883..1027863 100644
--- a/src/components/Map/usePostsEngine.js
+++ b/src/components/Map/usePostsEngine.js
@@ -113,6 +113,9 @@ function getPostTimeMs(p) {
   return d.getTime();
 }
 
+const MAX_POOL_POSTS = 150;
+const MAX_VISIBLE_POSTS = 90;
+
 function prunePosts(posts, center, maxCount) {
   if (!Array.isArray(posts) || posts.length <= maxCount) return posts || [];
   const [centerLon, centerLat] = center || [];
@@ -514,7 +517,12 @@ export function usePostsEngine({
     (tf) => {
       const vAll = computeVisible(tf);
       const map = mapRef.current;
-      const v = filterByBounds(vAll, map);
+      const vBounded = filterByBounds(vAll, map);
+      let v = vBounded;
+      if (v.length > MAX_VISIBLE_POSTS) {
+        const center = map?.getCenter?.();
+        v = prunePosts(v, [center?.lng, center?.lat], MAX_VISIBLE_POSTS);
+      }
 
       // reduce wall blink: don't update if same ids
       setVisiblePosts((prev) => (sameIdList(prev, v) ? prev : v));
@@ -689,7 +697,7 @@ export function usePostsEngine({
           }
         }
 
-        allPostsRef.current = prunePosts(Array.from(byId.values()), [lng, lat], 180);
+        allPostsRef.current = prunePosts(Array.from(byId.values()), [lng, lat], MAX_POOL_POSTS);
         lastFetchRef.current = { center: [...resolvedView.center], radiusKm, filterKey, timeFilter, bounds };
 
         // Smooth update: sync markers/clusters + wall without clearing everything
@@ -749,7 +757,7 @@ export function usePostsEngine({
         });
         if (cancelled) return;
         const posts = Array.isArray(data?.posts) ? data.posts : [];
-        allPostsRef.current = prunePosts(posts, [lon, lat], 120);
+        allPostsRef.current = prunePosts(posts, [lon, lat], MAX_POOL_POSTS);
         refreshVisibleAndMarkers(timeFilter);
       } catch {}
     }
@@ -784,7 +792,7 @@ export function usePostsEngine({
       }
       const map = mapRef.current;
       const center = map?.getCenter?.();
-      allPostsRef.current = prunePosts([p, ...allPostsRef.current], [center?.lng, center?.lat], 200);
+      allPostsRef.current = prunePosts([p, ...allPostsRef.current], [center?.lng, center?.lat], MAX_POOL_POSTS);
 
       const catCode = categoryCode(mainFilter);
       if (catCode) {