Optimize how statuses are re-rendered and relative time intervals

app/assets/javascripts/components/components/relative_timestamp.jsx

@@ -21,35 +21,28 @@ moment.updateLocale('en', {
 
 const RelativeTimestamp = React.createClass({
 
-  getInitialState () {
-    return {
-      text: ''
-    };
-  },
-
   propTypes: {
-    timestamp: React.PropTypes.string.isRequired
+    timestamp: React.PropTypes.string.isRequired,
+    now: React.PropTypes.any
   },
 
   mixins: [PureRenderMixin],
 
-  componentWillMount () {
-    this._updateMomentText();
-    this.interval = setInterval(this._updateMomentText, 60000);
-  },
-
-  componentWillUnmount () {
-    clearInterval(this.interval);
-  },
-
-  _updateMomentText () {
-    this.setState({ text: moment(this.props.timestamp).fromNow() });
-  },
-
   render () {
+    const timestamp = moment(this.props.timestamp);
+    const now       = this.props.now;
+
+    let string = '';
+
+    if (timestamp.isAfter(now)) {
+      string = 'Just now';
+    } else {
+      string = timestamp.from(now);
+    }
+
     return (
       <span>
-        {this.state.text}
+        {string}
       </span>
     );
   }

app/assets/javascripts/components/components/status.jsx

@@ -22,7 +22,8 @@ const Status = React.createClass({
     onReblog: React.PropTypes.func,
     onDelete: React.PropTypes.func,
     onOpenMedia: React.PropTypes.func,
-    me: React.PropTypes.number
+    me: React.PropTypes.number,
+    now: React.PropTypes.any
   },
 
   mixins: [PureRenderMixin],
@@ -43,7 +44,7 @@ const Status = React.createClass({
 
   render () {
     let media = '';
-    let { status, ...other } = this.props;
+    const { status, now, ...other } = this.props;
 
     if (status === null) {
       return <div />;
@@ -80,7 +81,7 @@ const Status = React.createClass({
       <div style={{ padding: '8px 10px', paddingLeft: '68px', position: 'relative', minHeight: '48px', borderBottom: '1px solid #363c4b', cursor: 'pointer' }} onClick={this.handleClick}>
         <div style={{ fontSize: '15px' }}>
           <div style={{ float: 'right', fontSize: '14px' }}>
-            <a href={status.get('url')} className='status__relative-time' style={{ color: '#616b86' }} target='_blank' rel='noopener'><RelativeTimestamp timestamp={status.get('created_at')} /></a>
+            <a href={status.get('url')} className='status__relative-time' style={{ color: '#616b86' }} target='_blank' rel='noopener'><RelativeTimestamp timestamp={status.get('created_at')} now={now} /></a>
           </div>
 
           <a onClick={this.handleAccountClick.bind(this, status.getIn(['account', 'id']))} href={status.getIn(['account', 'url'])} className='status__display-name' style={{ display: 'block', maxWidth: '100%', paddingRight: '25px', color: '#616b86' }}>

app/assets/javascripts/components/components/status_list.jsx

@@ -3,6 +3,7 @@ import ImmutablePropTypes  from 'react-immutable-proptypes';
 import PureRenderMixin     from 'react-addons-pure-render-mixin';
 import { ScrollContainer } from 'react-router-scroll';
 import StatusContainer     from '../containers/status_container';
+import moment              from 'moment';
 
 const StatusList = React.createClass({
 
@@ -18,8 +19,22 @@ const StatusList = React.createClass({
     };
   },
 
+  getInitialState () {
+    return {
+      now: moment()
+    };
+  },
+
   mixins: [PureRenderMixin],
 
+  componentDidMount () {
+    this._interval = setInterval(() => this.setState({ now: moment() }), 60000);
+  },
+
+  componentWillUnmount () {
+    clearInterval(this._interval);
+  },
+
   handleScroll (e) {
     const { scrollTop, scrollHeight, clientHeight } = e.target;
 
@@ -35,7 +50,7 @@ const StatusList = React.createClass({
       <div style={{ overflowY: 'scroll', flex: '1 1 auto', overflowX: 'hidden' }} className='scrollable' onScroll={this.handleScroll}>
         <div>
           {statusIds.map((statusId) => {
-            return <StatusContainer key={statusId} id={statusId} />;
+            return <StatusContainer key={statusId} id={statusId} now={this.state.now} />;
           })}
         </div>
       </div>