stream: deduplicate share min cursor updates

Author: trivikr

lib/internal/streams/iter/share.js

@@ -366,14 +366,14 @@ class ShareImpl {
   #deleteConsumerFromMin(consumer) {
     if (consumer.cursor === this.#cachedMinCursor) {
       this.#cachedMinCursorConsumers--;
+      return this.#cachedMinCursorConsumers === 0;
     }
+    return false;
   }
 
   #deleteConsumer(consumer) {
     if (this.#consumers.delete(consumer)) {
-      const wasAtMin = consumer.cursor === this.#cachedMinCursor;
-      this.#deleteConsumerFromMin(consumer);
-      return wasAtMin && this.#cachedMinCursorConsumers === 0;
+      return this.#deleteConsumerFromMin(consumer);
     }
     return false;
   }
@@ -615,14 +615,14 @@ class SyncShareImpl {
   #deleteConsumerFromMin(consumer) {
     if (consumer.cursor === this.#cachedMinCursor) {
       this.#cachedMinCursorConsumers--;
+      return this.#cachedMinCursorConsumers === 0;
     }
+    return false;
   }
 
   #deleteConsumer(consumer) {
     if (this.#consumers.delete(consumer)) {
-      const wasAtMin = consumer.cursor === this.#cachedMinCursor;
-      this.#deleteConsumerFromMin(consumer);
-      return wasAtMin && this.#cachedMinCursorConsumers === 0;
+      return this.#deleteConsumerFromMin(consumer);
     }
     return false;
   }