How to calculate response time in Django Python

Question

I am new to Django Python. Please advise how to calculate a response time from the moment where the user input the search criteria until the relevant information are loaded/disp

Answer 1

Since Django 1.10 this works differently now.

https://docs.djangoproject.com/en/3.0/topics/http/middleware/

The new style would be as follows:

import time


class StatsMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        start_time = time.time()

        response = self.get_response(request)

        duration = time.time() - start_time

        # Add the header. Or do other things, my use case is to send a monitoring metric
        response["X-Page-Generation-Duration-ms"] = int(duration * 1000)
        return response

No need to store the start time on the request object and retrieve because it all happens in the same method.

It can also be done in a simple function style instead of a class:

import time


def stats_middleware(get_response):

    def middleware(request):
        start_time = time.time()

        response = get_response(request)

        duration = time.time() - start_time

        response["X-Page-Generation-Duration-ms"] = int(duration * 1000)
        return response

    return middleware