Optimizing DRF performance - django

Question

I am trying to optimize a DRF view that has very low performance, is there a way to make it faster? This is where I am right now
Models:
class CategoryVideos(models.Model):
class Meta:
verbose_name = 'Category'
verbose_name_plural = 'Categories'
name = models.CharField(max_length=100, null=False, blank=False)
def __str__(self):
return f"{self.name} and {self.id}"
class Videos(models.Model):
category = models.ManyToManyField(CategoryVideos, null=True, blank=True)
illustration = models.FileField(null=True, blank=True)
video = models.FileField(null=True, blank=True)
title = models.CharField(max_length=255, null=True, blank=True)
description = models.CharField(max_length=255, null=True, blank=True)
url_video = models.CharField(max_length=255, null=True, blank=True)
url_image = models.CharField(max_length=255, null=True, blank=True)
Serializers:
class CategorySerializer2(serializers.ModelSerializer):
class Meta:
model = CategoryVideos
fields = ["name"]
class VideoSerializer(serializers.ModelSerializer):
category = CategorySerializer2(many=True, read_only=True)
class Meta:
model = Videos
fields = ["id", "description", "title", "url_video", "url_image", "category"]
read_only=True
View:
class OfferListAPIView(generics.ListAPIView):
queryset = Videos.objects.prefetch_related('category').all()
serializer_class=VideoSerializer
For the moment, with 400 videos and just 6 categories, it takes approx 2.8 secs to get an answer which is way too high.
Many thanks

Answer 1

As you are using only for listing you can add
db_index=True attribute for any field you can also use db_index=True to create an index on a ForeignKey and ManyToManyFields for performance.
make note that creating indexes can slow down the performance of some database operations, such as inserting or updating large amounts of data.