当我滥用interval Observable时，如何释放内存？

import { interval } from 'rxjs';

const subscription = interval(1000).subscribe(() => {
  // 处理逻辑
});

// 取消订阅释放内存
subscription.unsubscribe();

import { interval, Subject } from 'rxjs';
import { takeUntil } from 'rxjs/operators';

const stop$ = new Subject();

interval(1000)
  .pipe(takeUntil(stop$))
  .subscribe(() => {
    // 处理逻辑
  });

// 满足条件时调用stop$.next()取消订阅释放内存
stop$.next();

import { interval } from 'rxjs';
import { take } from 'rxjs/operators';

interval(1000)
  .pipe(take(5)) // 只执行5次
  .subscribe(() => {
    // 处理逻辑
  });