Serverless WSGI Local Server Running Slow

Im using the node package serverless-wsgi 1.4.9 to serve the routes of my serverless framework application

When I run by dev server serverless wsgi serve I’m having problems with the requests taking a long time (10seconds – 1min) to return a response in chrome. To avoid hitting a database I’m sending GET request to a route that immediately returns ‘hello world’ 200.

So far the only predictable behaviour I can find is that making a request using jquery will always cause a long delay before returning. If I try to request the same URL in the browser tab (whilst the jquery request is still waiting) the tab also waits a long time for for the request to return.

However, once the jquery request returns, calling the URL in a browser tab then returns immediately. Refreshing the tab gives a response immediately.

Sometimes, if jquery request is pending, calling the URL in a browser tab WILL return immediately. When this happens, this seem to also make the jquery request return a response.

Jquery code below:

  $( document ).ready(function() {
    $.get("http://localhost:5000/test", function(data, status){
      alert("Data: " + data + "nStatus: " + status);
    });
  });

I’ve tried restarting the server, browsers and my machine, but the problem still persists.

I’ve tried multiple browsers (safari, chrome, firefox) and all have the same issue.

I’ve tried making a javascript request using axios instead of jquery but still the requests are returning slowly.

Does anyone have any idea how I might solve this or any additional debugging I can do?