tweaks

core/src/main/java/com/onthegomap/flatmap/collections/FeatureGroup.java

@@ -336,10 +336,14 @@ public final class FeatureGroup implements Consumer<FeatureSort.Entry>, Iterable
       this.tile = TileCoord.decode(tile);
     }
 
-    public long getNumFeatures() {
+    public long getNumFeaturesProcessed() {
       return numFeaturesProcessed.get();
     }
 
+    public long getNumFeaturesToEmit() {
+      return entries.size();
+    }
+
     public TileCoord coord() {
       return tile;
     }

core/src/main/java/com/onthegomap/flatmap/write/MbtilesWriter.java

@@ -99,7 +99,7 @@ public class MbtilesWriter {
 
     var topology = Topology.start("mbtiles", stats);
 
-    int queueSize = 1_000;
+    int queueSize = 5_000;
 
     Topology<TileBatch> encodeBranch, writeBranch = null;
     if (config.emitTilesInOrder()) {
@@ -190,7 +190,12 @@ public class MbtilesWriter {
         LOGGER.info("[mbtiles] Starting z" + z);
         currentZoom = z;
       }
-      long thisTileFeatures = features.numFeatures();
+      long thisTileFeatures = feature.getNumFeaturesToEmit();
+      maxInputFeaturesPerTile.accumulateAndGet(thisTileFeatures, Long::max);
+      // TODO move to profile layer cost function
+      if (z != 13) {
+        thisTileFeatures /= 10;
+      }
       if (tilesInThisBatch > 0 &&
         (tilesInThisBatch >= MAX_TILES_PER_BATCH ||
           ((featuresInThisBatch + thisTileFeatures) > MAX_FEATURES_PER_BATCH))) {
@@ -200,7 +205,6 @@ public class MbtilesWriter {
         tilesInThisBatch = 0;
       }
       featuresInThisBatch += thisTileFeatures;
-      maxInputFeaturesPerTile.accumulateAndGet(thisTileFeatures, Long::max);
       tilesInThisBatch++;
       batch.in.add(feature);
     }
@@ -223,7 +227,7 @@ public class MbtilesWriter {
       FeatureGroup.TileFeatures last = null;
       for (int i = 0; i < batch.in.size(); i++) {
         FeatureGroup.TileFeatures tileFeatures = batch.in.get(i);
-        featuresProcessed.incBy(tileFeatures.getNumFeatures());
+        featuresProcessed.incBy(tileFeatures.getNumFeaturesProcessed());
         byte[] bytes, encoded;
         if (tileFeatures.hasSameContents(last)) {
           bytes = lastBytes;

openmaptiles/src/main/java/com/onthegomap/flatmap/openmaptiles/layers/Building.java

@@ -122,7 +122,7 @@ public class Building implements OpenMapTilesSchema.Building,
         .setAttrWithMinzoom(Fields.HIDE_3D, hide3d, 14);
       if (mergeZ13Buildings) {
         feature
-          .setMinPixelSize(0.25)
+          .setMinPixelSize(0.1)
           .setPixelTolerance(0.25); // improves performance of the building merge ~50% over default
       }
     }