You didn't provide a link. I assume you were going to link the blog post announcing their switch to Mithril — that didn't contain any rationale behind it. I di

You didn't provide a link. I assume you were going to link the blog post announcing their switch to Mithril — that didn't contain any rationale behind it. I did find this however, which goes into details about why Ember was not a good choice for them: http://discuss.flarum.org/139-introducing-flarum-s-fast-new-front-end#p345 http://discuss.flarum.org/139-introducing-flarum-s-fast-new-... Seems to be a well based choice. Doesn't seem to have anything to do with performance though. While Mithril is probably a lot more extensible and easeier to work with since there's a smaller API surface, seeing "templates" like this makes me sad: view() { return m('div.text-editor', {config: this.element}, [ m('textarea.form-control.flexible-height', { config: this.configTextarea.bind(this), oninput: m.withAttr('value', this.oninput.bind(this)), placeholder: this.props.placeholder || '', disabled: !!this.props.disabled, value: this.value() }), m('ul.text-editor-controls', listItems(this.controlItems(). toArray())) ]); }