Thanks for your reply. Rendering two (non nested) properties seems to not to impact performance.
Ive read at Ember is very slow at rendering lists about the {{group}}
helper before, but wrapping {{#each}}
with it in my application, causes an error (“TypeError: Cannot read property ‘view’ of undefined”).
I tried using {{#each groupedRows=true}}
, and unbound
too, but neither could help that much.