Website updates

Author: ahocevar

dist/en/main/examples/common.js

@@ -42,6 +42,14 @@ export default class GeoZarr extends DataTileSource<import("../DataTile.js").def
      * @private
      */
     private consolidatedMetadata_;
+    /**
+     * Cache of opened zarrita arrays keyed by path. Caching the Promise
+     * (not the resolved value) deduplicates concurrent opens for the same
+     * array path across tiles at the same zoom level.
+     * @type {Map<string, Promise<import('zarrita').Array<import('zarrita').DataType, any>>>}
+     * @private
+     */
+    private arrayCache_;
     /**
      * @type {Array<string>}
      * @private

dist/en/main/examples/common.js.map

@@ -75,6 +75,15 @@ export default class GeoZarr extends DataTileSource {
      */
     this.consolidatedMetadata_ = null;
 
+    /**
+     * Cache of opened zarrita arrays keyed by path. Caching the Promise
+     * (not the resolved value) deduplicates concurrent opens for the same
+     * array path across tiles at the same zoom level.
+     * @type {Map<string, Promise<import('zarrita').Array<import('zarrita').DataType, any>>>}
+     * @private
+     */
+    this.arrayCache_ = new Map();
+
     /**
      * @type {Array<string>}
      * @private
@@ -251,7 +260,16 @@ export default class GeoZarr extends DataTileSource {
       const maxRow = Math.round((origin[1] - tileExtent[1]) / bandResolution);
 
       const path = `${this.group_}/${bandMatrixId}/${band}`;
-      const array = await open(this.root_.resolve(path), {kind: 'array'});
+      if (!this.arrayCache_.has(path)) {
+        this.arrayCache_.set(
+          path,
+          open(this.root_.resolve(path), {kind: 'array'}).catch((err) => {
+            this.arrayCache_.delete(path);
+            throw err;
+          }),
+        );
+      }
+      const array = await this.arrayCache_.get(path);
       bandPromises.push(
         get(array, [slice(minRow, maxRow), slice(minCol, maxCol)]),
       );