Incorrect (recomputes on every access):

import Component from '@glimmer/component';

class DataTable extends Component {
  get filteredAndSortedData() {
    // Expensive: runs on every access, even if nothing changed
    return this.args.data
      .filter((item) => item.status === this.args.filter)
      .sort((a, b) => a[this.args.sortBy] - b[this.args.sortBy])
      .map((item) => this.transformItem(item));
  }
}