Почему страница грузится 2 секунды? django

Почему страница грузится 2 секунды? Может, потому, что несколько for в html?

views

class OrdersHomeView(ListView):
    #model = Orders
    paginate_by = 10
    template_name = 'orders/orders_list.html'
    context_object_name = 'orders'

    def get_queryset(self):
        return self.getQuery()

    def get_context_data(self, *, object_list=None, **kwargs):
        context = super().get_context_data(**kwargs)
        context['title'] = 'Все заказы'
        # filter
        list_orders = self.getQuery()
        #paginator
        paginator = Paginator(list_orders, self.paginate_by)
        page = self.request.GET.get('page')
        try:
            orders_page = paginator.page(page)
        except PageNotAnInteger:
            page = 1
            orders_page = paginator.page(page)
        except EmptyPage:
            orders_page = paginator.page(paginator.num_pages)
        print('orders_page ', orders_page.object_list)
        # related data
        related = self.checkRelated()
        related_list = []
        if related:
            for x in related:
                modelPath = x.module_name + '.models'
                app_model = importlib.import_module(modelPath)
                cls = getattr(app_model, x.related_class_name)
                for r in orders_page:
                    print('r ', r)
                    try:
                        cls2 = cls.objects.get(related_uuid=r.related_uuid)
                        related_get = cls2.get_related_data()
                        #print('related_get', related_get)
                        related_list.append(related_get)
                    except ObjectDoesNotExist:
                        pass
        #print('related_list', related_list)
        context['related_list'] = related_list
        return context

    def checkRelated(self):
        related = Plugins.objects.get(module_name='orders')
        return related.related.all()

    def getQuery(self):
        category_filter = self.request.GET.get('category')
        if category_filter:
            list_orders = Orders.objects.filter(category__category=category_filter)
        else:
            list_orders = Orders.objects.all()
        return list_orders

html

{% extends "base.html" %}
{% block title %}{{ title }} - {{ block.super }}{% endblock %}
{% block sidebar %}
    {% include 'include/_sidebar_orders.html' %}
{% endblock %}
{% block content %}
    <div class="row">
        <div class="col-4">
            <div class="list-group" id="list-tab" role="tablist">
                {% for item in page_obj %}
                    <a class="list-group-item list-group-item-action" id="list-{{ item.pk }}" data-bs-toggle="list" href="#id-list-{{ item.pk }}" role="tab" aria-controls="home">Заказ {{ item.pk }}</a>
                {% endfor %}
            </div>
        </div>
        <div class="col-8">
            <div class="tab-content" id="nav-tabContent">
                {% for item in page_obj %}
                    <div class="tab-pane fade show" id="id-list-{{ item.pk }}" role="tabpanel" aria-labelledby="list-{{ item.pk }}">
                        <div class="shadow p-3 mb-5 bg-body rounded">
                            <div class="d-flex justify-content-end">
                                <a href="edit/{{ item.pk }}"><button type="button" class="btn btn-secondary">Редактировать</button></a>
                            </div><br>
                            {% for related_item in related_list %}
                                {% if related_item.related_uuid and item.related_uuid == related_item.related_uuid %}
                                    <div class="card border-light" >
                                        <div class="card-header">{{ related_item.module_name }}</div>
                                        <div class="card-body">
                                        {% for key, value in related_item.items %}
                                            {% if key != 'related_uuid' and key != 'module_name' %}
                                                {{ key }}: {{ value }}<br>
                                            {% endif %}
                                        {% endfor %}
                                        </div>
                                        </div>
                                {% endif %}
                            {% endfor %}

                            <div class="card border-light" >
                                <div class="card-header bg-gradient">Заказ: {{ item.pk }}<br></div>
                                <div class="card-body">
                                    В ремонте: {{ item.device }}<br>
                                    Статус: {{ item.status }}<br>
                                    Серийный: {{ item.serial }}<br>
                                    Комментарий: {{ item.comment }}<br>
                                    Категория: {{ item.category }}<br>

                                </div>
                            </div>

                        </div>
                    </div>
                {% endfor %}
            </div>
        </div>
    </div>
    <br><br>
    <nav aria-label="...">
        <ul class="pagination">
            {% if page_obj.has_previous %}
                <li class="page-item">
                    <a class="page-link" href="?page=1">&laquo; В начало</a>
                </li>
                <li class="page-item">
                    <a class="page-link" href="?page={{ page_obj.previous_page_number }}">Предудущая</a>
                </li>
            {% endif %}
            {% for p in page_obj.paginator.page_range %}
                {% if page_obj.number == p %}
                    <li class="page-item active" aria-current="page">
                        <span class="page-link">{{ p }}</span>
                    </li>
                {% elif p > page_obj.number|add:-3 and p < page_obj.number|add:3 %}
                    <li class="page-item">
                        <a class="page-link" href="?page={{ p }}">{{ p }}</a>
                    </li>
                {% endif %}
            {% endfor %}
            {% if page_obj.has_next %}
                <li class="page-item">
                    <a class="page-link" href="?page={{ page_obj.next_page_number }}">Следующая</a>
                </li>
                <li class="page-item">
                    <a class="page-link" href="?page={{ page_obj.paginator.num_pages }}"> В конец &raquo;</a>
                </li>
            {% endif %}
        </ul>
    </nav>
{% endblock %}