1 files changed, 0 insertions, 68 deletions
diff --git a/std/async/pool.ts b/std/async/pool.ts
deleted file mode 100644
index 0b87f24ac..000000000
--- a/std/async/pool.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
-
-/**
- * pooledMap transforms values from an (async) iterable into another async
- * iterable. The transforms are done concurrently, with a max concurrency
- * defined by the poolLimit.
- *
- * If an error is thrown from `iterableFn`, no new transformations will begin.
- * All currently executing transformations are allowed to finish and still
- * yielded on success. After that, the rejections among them are gathered and
- * thrown by the iterator in an `AggregateError`.
- *
- * @param poolLimit The maximum count of items being processed concurrently.
- * @param array The input array for mapping.
- * @param iteratorFn The function to call for every item of the array.
- */
-export function pooledMap<T, R>(
-  poolLimit: number,
-  array: Iterable<T> | AsyncIterable<T>,
-  iteratorFn: (data: T) => Promise<R>,
-): AsyncIterableIterator<R> {
-  // Create the async iterable that is returned from this function.
-  const res = new TransformStream<Promise<R>, R>({
-    async transform(
-      p: Promise<R>,
-      controller: TransformStreamDefaultController<R>,
-    ): Promise<void> {
-      controller.enqueue(await p);
-    },
-  });
-  // Start processing items from the iterator
-  (async (): Promise<void> => {
-    const writer = res.writable.getWriter();
-    const executing: Array<Promise<unknown>> = [];
-    try {
-      for await (const item of array) {
-        const p = Promise.resolve().then(() => iteratorFn(item));
-        // Only write on success. If we `writer.write()` a rejected promise,
-        // that will end the iteration. We don't want that yet. Instead let it
-        // fail the race, taking us to the catch block where all currently
-        // executing jobs are allowed to finish and all rejections among them
-        // can be reported together.
-        p.then((v) => writer.write(Promise.resolve(v))).catch(() => {});
-        const e: Promise<unknown> = p.then(() =>
-          executing.splice(executing.indexOf(e), 1)
-        );
-        executing.push(e);
-        if (executing.length >= poolLimit) {
-          await Promise.race(executing);
-        }
-      }
-      // Wait until all ongoing events have processed, then close the writer.
-      await Promise.all(executing);
-      writer.close();
-    } catch {
-      const errors = [];
-      for (const result of await Promise.allSettled(executing)) {
-        if (result.status == "rejected") {
-          errors.push(result.reason);
-        }
-      }
-      writer.write(Promise.reject(
-        new AggregateError(errors, "Threw while mapping."),
-      )).catch(() => {});
-    }
-  })();
-  return res.readable[Symbol.asyncIterator]();
-}