title: JsonField in Django for MySQL
body: <p>I currently use django 3.2 and MySQL as database, I want use <a href="https://dev.mysql.com/doc/refman/8.0/en/json.html" rel="nofollow noreferrer">MySql Json Field</a>. For this reason use <a href="https://pypi.org/project/django-mysql/" rel="nofollow noreferrer">django-mysql</a> third party package in my project.
  After create model got this Warning: <code>(django_mysql.W004) django_mysql.models.JSONField is deprecated. HINT: Use django.db.models.JSONField or django-jsonfield-backport instead.</code>
  If i use <code> django.db.models.JSONField</code> as json field, django use specific MySQL's JsonField ? Dose any effect on preformance? Which one has best performance on database?</p>