markerikson

[10:57 PM] acemarke: so, the canonical "bad perf for React+Redux" example is a todo list of 10,000 items
[10:58 PM] Sinistral: I always thought passing an object through was just a typical JS pointer
[10:58 PM] acemarke: the trivially obvious store shape is a single array of all 10K todo objects
[10:58 PM] acemarke: with a single connected list component
[10:58 PM] Sinistral: eh, ignore me, finish
[10:59 PM] acemarke: the list's mapState retrieves the array, and the list component renders this.props.todos.map(todo => <TodoListItem todo={todo} /> )
[10:59 PM] acemarke: which works fine the first time around
[10:59 PM] acemarke: but if you edit, say, the "text" field in a single todo
[11:00 PM] acemarke: your reducer returns a new updated todo object inside of a new array reference, shallow-copied
[11:00 PM] Sinistral: You are re-drawing the enti...oh