import type { Option, Result } from '@chzky/core';
import { IllegalOperatError, Refer } from '@chzky/core';
type Recorder = {
    /** ### `diff` : `start - end` 的时间差 ; 单位`ms` */
    diff: Refer<Option<number>>;
    start: () => void;
    end: () => Result<number, IllegalOperatError>;
};
/** ## `TimeDiffRecorder` : 时间差记录器
@example Usage
```ts
  const { start, end, diff } = TimeDiffRecorder()
  start()
  await sleep(1000)
  end()
    const diff_t = diff.value.unwrap() // 时间差
  assert(diff_t> 1000)
```

@category async
 */
export declare function TimeDiffRecorder(init_time?: number): Recorder;
export {};
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