Removed hard limit on unprocessed messages in cache

ts/util/iterables.ts

@@ -257,6 +257,23 @@ export function repeat<T>(value: T): Iterable<T> {
   return new RepeatIterable(value);
 }
 
+export function* chunk<A>(
+  iterable: Iterable<A>,
+  chunkSize: number
+): Iterable<Array<A>> {
+  let aChunk: Array<A> = [];
+  for (const item of iterable) {
+    aChunk.push(item);
+    if (aChunk.length === chunkSize) {
+      yield aChunk;
+      aChunk = [];
+    }
+  }
+  if (aChunk.length > 0) {
+    yield aChunk;
+  }
+}
+
 class RepeatIterable<T> implements Iterable<T> {
   constructor(private readonly value: T) {}