Function mapLimit

apps/desktop/src/main/vault.ts:2457–2479

(
  items: T[],
  limit: number,
  worker: (item: T, index: number) => Promise<U>
)

}

async function mapLimit<T, U>(
  items: T[],
  limit: number,
  worker: (item: T, index: number) => Promise<U>
): Promise<U[]> {
  const results = new Array<U>(items.length)
  let nextIndex = 0

  const run = async (): Promise<void> => {
    while (nextIndex < items.length) {
      const index = nextIndex
      nextIndex += 1
      results[index] = await worker(items[index], index)
    }
  }

  const workers = Array.from(
    { length: Math.min(limit, items.length) },
    () => run()
  )
  await Promise.all(workers)
  return results
}

/**
 * Walk every directory under the three top-level folders and return a