Add/update filtered-sum-bms benchmark

spot-launcher/node_modules/@smithy/util-stream/dist-es/splitStream.js

@@ -0,0 +1,13 @@
+import { PassThrough } from "stream";
+import { splitStream as splitWebStream } from "./splitStream.browser";
+import { isBlob, isReadableStream } from "./stream-type-check";
+export async function splitStream(stream) {
+    if (isReadableStream(stream) || isBlob(stream)) {
+        return splitWebStream(stream);
+    }
+    const stream1 = new PassThrough();
+    const stream2 = new PassThrough();
+    stream.pipe(stream1);
+    stream.pipe(stream2);
+    return [stream1, stream2];
+}