Function sleep

packages/core/src/util/flock.ts:76–101

(ms: number, signal?: AbortSignal)

  }

  function sleep(ms: number, signal?: AbortSignal) {
    return new Promise<void>((resolve, reject) => {
      if (signal?.aborted) {
        reject(signal.reason ?? new Error("Aborted"))
        return
      }

      let timer: NodeJS.Timeout | undefined

      const done = () => {
        signal?.removeEventListener("abort", abort)
        resolve()
      }

      const abort = () => {
        if (timer) {
          clearTimeout(timer)
        }
        signal?.removeEventListener("abort", abort)
        reject(signal?.reason ?? new Error("Aborted"))
      }

      signal?.addEventListener("abort", abort, { once: true })
      timer = setTimeout(done, ms)
    })
  }

  function jitter(ms: number) {
    const j = Math.floor(ms * 0.3)