Performance problems while creating multiple objects - django

Question

My aim is to create a matrix with individual editable fields. Since different people should only be allowed to edit certain fields I thought about creating an object called CellCE and an object level permission.
my models.py
class CellCE(models.Model):
row = models.ForeignKey('Descriptor',related_name='activecell', on_delete=models.CASCADE)
col = models.ForeignKey('Descriptor',related_name='passivecell', on_delete=models.CASCADE)
val = models.IntegerField(default=0)
project = models.ForeignKey('Project', on_delete=models.CASCADE, default='1')
#permission for Cells
class Meta:
permissions = (
("edit_cellCE", "Has permission to edit value of Cause and Effect cell"),
)
#classmethod
def create(cls, row, col, project):
CellCE = cls(row=row, col=col, project=project)
CellCE.save()
return CellCE
my views.py
def phase2(request, id):
projectname = get_object_or_404(Project, pk=id)
projectid = id
project = Project.objects.get (id=projectid)
projectdescriptors = Descriptor.objects.filter( project=projectid)
for Descriptor.id in projectdescriptors:
row = Descriptor.id
for Descriptor.id in projectdescriptors:
col = Descriptor.id
if CellCE.objects.filter(row=row, col=col, project=project).exists():
pass
else:
obj = CellCE.create(row, col, project)
CellCElist = CellCE.objects.filter(project= project)
context = {'CellCElist': CellCElist, 'projectname': projectname, 'projectid': projectid, 'projectdescriptors': projectdescriptors}
return render(request, 'szenario/phase2.html', context)
my template
<table>
{% for drow in projectdescriptors %}
{% if forloop.first %}
<tr>
<th align="left">Descriptors</th>
{% for value in projectdescriptors %}
<th>{{value}}</th>
{% endfor %}
</tr>
{% endif %}
<tr>
<th align="left">{{drow}}</th>
{% for dcol in projectdescriptors %}
<td align="center">
{% if forloop.parentloop.counter == forloop.counter %}
-
{% else %}
{% for CellCE in CellCElist %}
{% if CellCE.col == dcol %}
{% if CellCE.row == drow %}
Value =
{{CellCE.val}}
{% endif %}
{% endif %}
{% endfor %}
<form method="post">
{% csrf_token %}
<input type="submit" value="+1">
<input type="submit" value="-1">
</form>
{% endif %}
</td>
{% endfor %}
</tr>
{% endfor %}
</table>
The number of descriptors determins the size of the matrix. With every Descriptor over 15> loading the page takes longer or doesnt work at all. I am using SQLLite.
Question: How can I increase the loadingspeed and make this work at all? Does a change of DB solve the Problem or should i overthink my concept.
Any Help is appreciated.