```ts
/**
*
* @param uid uid
* @param max 最多并发请求数量
*/
const queue: (() => unknown)[] = [];
let activeCount = 0;
let queueCursor = 0;
const requestUserProfile = (uid: string, max = 2) => {
return new Promise((resolve) => {
const runF = async () => {
activeCount++;
const r = await requestProfile(uid);
activeCount--;
if (queueCursor < queue.length) {
queue[queueCursor++]();
}

return resolve(r);
};

queue.push(runF);

if (activeCount < max) {
queue[queueCursor++]();
}
});
};
```