diff --git a/.changes/barcode-scanner-ios-thread.md b/.changes/barcode-scanner-ios-thread.md
new file mode 100644
index 00000000..61365bfa
--- /dev/null
+++ b/.changes/barcode-scanner-ios-thread.md
@@ -0,0 +1,6 @@
+---
+barcode-scanner: patch
+barcode-scanner-js: patch
+---
+
+On iOS, start the scanning session on a separate thread to fix performance issues.
diff --git a/plugins/barcode-scanner/ios/Sources/BarcodeScannerPlugin.swift b/plugins/barcode-scanner/ios/Sources/BarcodeScannerPlugin.swift
index 4ad399da..450c3cf7 100644
--- a/plugins/barcode-scanner/ios/Sources/BarcodeScannerPlugin.swift
+++ b/plugins/barcode-scanner/ios/Sources/BarcodeScannerPlugin.swift
@@ -286,7 +286,9 @@ class BarcodeScannerPlugin: Plugin, AVCaptureMetadataOutputObjectsDelegate {
     }
 
     self.metaOutput!.metadataObjectTypes = self.scanFormats
-    self.captureSession!.startRunning()
+    DispatchQueue.main.async {
+      self.captureSession!.startRunning()
+    }
 
     self.isScanning = true
   }