Slow Performance while Selecting/Deselecting All Roles in User Doctype

Description of the issue

Select All and Unselect All buttons in User Doctype to select Role become slow as the number of roles increases.

For better systems with 16 GB RAM, it takes around 500 roles to see the slowness, but for 4GB systems, even for 200 roles, which is a reasonable amount of roles, it is extremely slow (takes around 5-10s).

The thing is, for the older version that I used to use, v15.87.0, it is fast even for similar number of users.

Context information (for bug reports)

Output of bench version

doppio 0.0.1
frappe 15.103.0
insights 3.2.18
lms 2.48.0

Steps to reproduce the issue

1. Create around 500 test roles through the bench console

import frappe

count = 0
for i in range(1, 500):
    role_name = f"BUG_TEST_USER_{i:03d}"

    if not frappe.db.exists("Role", role_name):
        frappe.get_doc({"doctype": "Role", "role_name": role_name}).insert(ignore_permissions=True)
        count += 1

    frappe.db.commit()

print(f"Created {count} roles")

2. Go to any User in the User Doctype
3. Click Select All in the Roles & Permissions Tab
4. You can observe the slowness. Note: It depends on the system RAM, systems with 4 GB RAM or less get impacted severely for even 200 users.
5. Script to delete all test roles once tested through bench console

roles = frappe.get_all("Role", filters={"name": ["like", "BUG_TEST_USER_%"]}, pluck="name")
for role in roles:
    try:
        frappe.delete_doc("Role", role, ignore_permissions=True)
    except Exception:
        print("Skipping", role)
        continue
frappe.db.commit()
print(f"Deleted {len(roles)} test roles.")

Observed result

Takes around 5 seconds to select/deselect all roles.

Expected result

Should be immediate.

Additional information

MacOS, M3 Bare Metal Setup

https://github.com/user-attachments/assets/f4738b29-cd83-4c13-a331-39cb7f347f8d