Function jitter

packages/core/src/util/flock.ts:103–107

(ms: number)

  }

  function jitter(ms: number) {
    const j = Math.floor(ms * 0.3)
    const d = Math.floor(Math.random() * (2 * j + 1)) - j
    return Math.max(0, ms + d)
  }

  function mono() {
    return performance.now()