avoid worker data copy when returning values typed arrays

GeoTIFF · Jul 28, 2023 · fdffef1 · fdffef1
1 parent ad4681a
commit fdffef1
Showing 1 changed file with 6 additions and 3 deletions.
diff --git a/src/worker.js b/src/worker.js
@@ -7,11 +7,14 @@ const window = self;
 onmessage = e => {
   const data = e.data;
   parseData(data).then(result => {
+    let transferBuffers = [];
+    if ( result.values && (result.values[0][0].buffer instanceof ArrayBuffer) ) {
+        transferBuffers = result.values.flat().map(r => r.buffer);
+    }
     if (result._data instanceof ArrayBuffer) {
-      postMessage(result, [result._data]);
-    } else {
-      postMessage(result);
+      transferBuffers.push(result._data);
     }
+    postMessage(result, transferBuffers);
     close();
   });
 };