Angular Universal TTFB is very slow

Question

When I run my application with angular universal, I am seeing huge difference in TTFB. ssr is taking more time than normal angular command. How to improve TTFB with angular universal server side rendering?

npm run serve:ssr

Performance tab:

ng serve

Looked into many sites but didn't found any relevant solution on internet till yet.

Answer 1

It seems that you have a setTimeout or an http call that takes too much time to finish and angular universal does not serve the webpage until all the calls are finished.

I recommend you that if the timeout or http call is not essential to render the webpage, avoid the call on the server side.

Answer 2

I had the same problem and I fixed it by removing all setTimeout and setInterval

If you need to use timeouts you can use this function instead of the regular setTimeout

export function setTimeout$(cb: () => void, timer: number) {
  of(true).pipe(debounceTime(timer), first()).subscribe(cb);
}