Performance improvements

* Pre-compute name, formatted sizes and speeds.
* Handle name edge-cases such as no-path and no-uris better.
* Unroll getCtx.
* Improve performance of mergeMap.
* Delay the search filter.

As indicated by Chrome/Gecko profilers.

index.html

@@ -264,7 +264,7 @@
     <fieldset>
       <div class="span4">
         <label for="downloadFilter">Search</label>
-        <input id="downloadFilter" type="text" ng-model="downloadFilter" class="input-large"/>
+        <input id="downloadFilter" type="text" ng-model="downloadFilter" ng-change="onDownloadFilter()" class="input-large"/>
         <br>
         <b>Found: {{totalDownloads}} / {{totalAria2Downloads()}} </b>
       </div>
@@ -277,7 +277,7 @@
     <tbody>
     <tr>
       <td class="download-name download-item" ng-click="download.collapsed = !download.collapsed">
-        {{getName(download)}}
+        {{download.name}}
       </td>
       <td class="download-controls download-item" rowspan="2">
         <!-- {{{ download control buttons -->
@@ -368,11 +368,11 @@
           </li>
 
           <li class="label label-active hidden-phone">
-            <span title="Download Size"><i class="icon-cloud-download">&nbsp;</i> {{download.totalLength | blength}}</span>
+            <span title="Download Size"><i class="icon-cloud-download">&nbsp;</i> {{download.fmtTotalLength}}</span>
           </li>
 
           <li class="label label-active hidden-phone">
-            <span title="Downloaded"><i class="icon-download-alt">&nbsp;</i> {{download.completedLength | blength}}</span>
+            <span title="Downloaded"><i class="icon-download-alt">&nbsp;</i> {{download.fmtCompletedLength}}</span>
           </li>
 
           <li class="label label-active hidden-phone hidden-tablet">
@@ -389,11 +389,11 @@
           </li>
 
           <li class="label label-info">
-            <span title="Download Size"><i class="icon-cloud-download">&nbsp;</i> {{download.totalLength | blength}}</span>
+            <span title="Download Size"><i class="icon-cloud-download">&nbsp;</i> {{download.fmtTotalLength}}</span>
           </li>
 
           <li class="label label-info hidden-phone">
-            <span title="Downloaded"><i class="icon-download-alt">&nbsp;</i> {{download.completedLength | blength}}</span>
+            <span title="Downloaded"><i class="icon-download-alt">&nbsp;</i> {{download.fmtCompletedLength}}</span>
           </li>
 
           <li class="label label-info hidden-phone">
@@ -436,7 +436,7 @@
           </li>
 
           <li class="label label-success">
-            <span title="Download Size"><i class="icon-cloud-download">&nbsp;</i> {{download.totalLength | blength}}</span>
+            <span title="Download Size"><i class="icon-cloud-download">&nbsp;</i> {{download.fmtTotalLength}}</span>
           </li>
 
           <!-- }}} -->
@@ -455,7 +455,7 @@
 
           <li ng-show="hasStatus(download, 'removed')"
             class="label label-warning">
-            <span title="Download Size"><i class="icon-cloud-download">&nbsp;</i> {{download.totalLength | blength}}</span>
+            <span title="Download Size"><i class="icon-cloud-download">&nbsp;</i> {{download.fmtTotalLength}}</span>
           </li>
           <!-- }}} -->
         </ul>
@@ -471,7 +471,7 @@
           </li>
 
           <li class="label label-important">
-            <span title="Download Size"><i class="icon-cloud-download">&nbsp;</i> {{download.totalLength | blength}}</span>
+            <span title="Download Size"><i class="icon-cloud-download">&nbsp;</i> {{download.fmtTotalLength}}</span>
           </li>
           <!-- }}} -->
         </ul>
@@ -495,21 +495,21 @@
           <ul class="stats download-item">
             <li class="label" title="Download Path"><i class="icon-folder-open">&nbsp;</i> <span class="download-dir">{{download.dir}}</span></li>
             <li class="label" title="Estimated Time"><i class="icon-time">&nbsp;</i> <span class="download-eta">{{getEta(download) | time}}</span></li>
-            <li class="label" title="Download Size"><i class="icon-cloud-download">&nbsp;</i> <span class="download-totalLength">{{download.totalLength | blength}}</span></li>
+            <li class="label" title="Download Size"><i class="icon-cloud-download">&nbsp;</i> <span class="download-totalLength">{{download.fmtTotalLength}}</span></li>
-            <li class="label" title="Downloaded"><i class="icon-download-alt">&nbsp;</i> <span class="download-completedLength">{{download.completedLength | blength}}</span></li>
+            <li class="label" title="Downloaded"><i class="icon-download-alt">&nbsp;</i> <span class="download-completedLength">{{download.fmtCompletedLength}}</span></li>
-            <li class="label" title="Download Speed"><i class="icon-download">&nbsp;</i> <span class="download-downloadSpeed">{{download.downloadSpeed | bspeed}}</span></li>
+            <li class="label" title="Download Speed"><i class="icon-download">&nbsp;</i> <span class="download-downloadSpeed">{{download.fmtDownloadSpeed}}</span></li>
 
-            <li class="label" title="Upload Speed" ng-show="download.bittorrent"><i class="icon-upload">&nbsp;</i> <span class="download-uploadSpeed">{{download.uploadSpeed | bspeed}}</span></li>
+            <li class="label" title="Upload Speed" ng-show="download.bittorrent"><i class="icon-upload">&nbsp;</i> <span class="download-uploadSpeed">{{download.fmtUploadSpeed}}</span></li>
-            <li class="label" title="Uploaded" ng-show="download.bittorrent"><i class="icon-upload-alt">&nbsp;</i> <span class="download-uploadLength">{{download.uploadLength | blength}}</span></li>
+            <li class="label" title="Uploaded" ng-show="download.bittorrent"><i class="icon-upload-alt">&nbsp;</i> <span class="download-uploadLength">{{download.fmtUploadLength}}</span></li>
 
             <li class="label" title="Connections"><i class="icon-link">&nbsp;</i> <span class="download-connections">{{download.connections}}</span></li>
 
             <li class="label" title="Download GID"><i class="icon-reorder">&nbsp;</i> <span class="download-gid">{{download.gid}}</span></li>
             <li class="label" title="Number of Pieces"># of <i class="icon-puzzle-piece">&nbsp;</i> <span class="download-numPieces">{{download.numPieces}}</span></li>
-            <li class="label" title="Piece Length"><i class="icon-puzzle-piece"></i> Length&nbsp; <span class="download-pieceLength">{{download.pieceLength | blength}}</span></li>
+            <li class="label" title="Piece Length"><i class="icon-puzzle-piece"></i> Length&nbsp; <span class="download-pieceLength">{{download.fmtPieceLength}}</span></li>
           </ul>
           <ul class="download-files hidden-phone download-item">
-            <li class="label" ng-repeat="file in download.files">{{file.relpath}} ({{file.length | blength}})</li>
+            <li class="label" ng-repeat="file in download.files">{{file.relpath}} ({{file.fmtLength}})</li>
           </ul>
           <div ng-show="hasStatus(download, 'active')" class="download-item">
             <div class="download-graph" dspeed="download.downloadSpeed" uspeed="download.uploadSpeed" dgraph draw="!download.collapsed"></div>

js/ctrls/download.js

@@ -106,10 +106,26 @@ function(
 
   // download search filter
   scope.downloadFilter = "";
+  scope.downloadFilterCommitted = "";
+
+  scope.onDownloadFilter = function() {
+    if (scope.downloadFilterTimer) {
+      clearTimeout(scope.downloadFilterTimer);
+    }
+    scope.downloadFilterTimer = setTimeout(function() {
+      delete scope.downloadFilterTimer;
+      if (scope.downloadFilterCommitted !== scope.downloadFilter) {
+        scope.downloadFilterCommitted = scope.downloadFilter;
+        scope.$digest();
+      }
+    }, 500);
+  };
 
   scope.filterDownloads = function(downloads) {
-    var filter = scope.downloadFilter;
+    if (!scope.downloadFilterCommitted) {
-    if (!filter.length) return downloads;
+      return downloads;
+    }
+    var filter = scope.downloadFilterCommitted;
     return _.filter(downloads, function(d) {
       if (!d.files.length) return true;
 
@@ -187,27 +203,79 @@ function(
   // convert the donwload form aria2 to once used by the view,
   // minor additions of some fields and checks
   scope.getCtx = function(d, ctx) {
-    ctx = ctx || {};
+    if (!ctx) {
+      ctx = {
+        dir: d.dir,
+        status: d.status,
+        gid: d.gid,
+        numPieces: d.numPieces,
+        connections: d.connections,
+        bitfield: d.bitfield,
+        totalLength: d.totalLength,
+        fmtTotalLength: utils.fmtsize(d.totalLength),
+        completedLength: d.completedLength,
+        fmtCompletedLength: utils.fmtsize(d.completedLength),
+        uploadLength: d.uploadLength,
+        fmtUploadLength: utils.fmtsize(d.uploadLength),
+        pieceLength: d.pieceLength,
+        fmtPieceLength: utils.fmtsize(d.pieceLength),
+        downloadSpeed: d.downloadSpeed,
+        fmtDownloadSpeed: utils.fmtspeed(d.downloadSpeed),
+        uploadSpeed: d.uploadSpeed,
+        fmtUploadSpeed: utils.fmtspeed(d.uploadSpeed),
+        files: []
+      };
+    }
+    else {
+      ctx.dir = d.dir;
+      ctx.status = d.status;
+      ctx.gid = d.gid;
+      ctx.numPieces = d.numPieces;
+      ctx.connections = d.connections;
+      ctx.bitfield = d.bitfield;
+      if (ctx.totalLength !== d.totalLength) {
+        ctx.totalLength = d.totalLength;
+        ctx.fmtTotalLength = utils.fmtsize(d.totalLength);
+      }
+      if (ctx.completedLength !== d.completedLength) {
+        ctx.completedLength = d.completedLength;
+        ctx.fmtCompletedLength = utils.fmtsize(d.completedLength);
+      }
+      if (ctx.uploadLength !== d.uploadength) {
+        ctx.uploadLength = d.uploadlength;
+        ctx.fmtUploadLength = utils.fmtsize(d.uploadLength);
+      }
+      if (ctx.pieceLength !== d.pieceLength) {
+        ctx.pieceLength = d.pieceLength;
+        ctx.fmtPieceLength = utils.fmtsize(d.pieceLength);
+      }
+      if (ctx.downloadSpeed !== d.downloadSpeed) {
+        ctx.downloadSpeed =  d.downloadSpeed;
+        ctx.fmtDownloadSpeed = utils.fmtspeed(d.downloadSpeed);
+      }
+      if (ctx.uploadSpeed !== d.uploadSpeed) {
+        ctx.uploadSpeed =  d.uploadSpeed;
+        ctx.fmtUploadSpeed = utils.fmtspeed(d.uploadSpeed);
+      }
+    }
 
-    _.each([
+    var dlName;
-      'totalLength', 'completedLength', 'uploadLength', 'dir',
+    var files = d.files;
-      'pieceLength', 'downloadSpeed', 'uploadSpeed', 'status',
-      'gid', 'numPieces', 'connections', 'bitfield'
-    ], function(e) {
-      ctx[e] = d[e];
-    });
-
-    var files = d["files"];
     if (files) {
-      var cfiles = ctx["files"] || (ctx["files"] = []);
+      dlName = files[0].path || d.files[0].uris[0].uri;
+      var cfiles = ctx.files;
       for (var i = 0; i < files.length; ++i) {
         var cfile = cfiles[i] || (cfiles[i] = {});
         var file = files[i];
         if (file.path !== cfile.path) {
           cfile.path = file.path;
           cfile.length = file.length;
+          cfile.fmtLength = utils.fmtsize(file.length);
           cfile.relpath = file.path.replace(re_slashes, slash);
-          if (!cfile.relpath.startsWith("[")) { // METADATA
+          if (!cfile.relpath) {
+            cfile.relpath = (file.uris && file.uris[0] && file.uris[0].uri) || "Unknown";
+          }
+          else if (!cfile.relpath.startsWith("[")) { // METADATA
             cfile.relpath = cfile.relpath.substr(ctx.dir.length + 1);
           }
         }
@@ -215,20 +283,24 @@ function(
       cfiles.length = files.length;
     }
     else {
-      delete ctx["files"];
+      delete ctx.files;
     }
 
+    var btName;
     if (d.bittorrent) {
-      ctx.bittorrentName = d.bittorrent.info && d.bittorrent.info.name;
+      btName = d.bittorrent.info && d.bittorrent.info.name;
       ctx.bittorrent = true;
     }
     else {
-      delete ctx.bittorrentName;
+      delete ctx.bittorrent;
     }
 
+    ctx.name = btName || utils.getFileName(dlName) || dlName || "Unknown";
+
     // collapse the download details initially
-    if (ctx.collapsed === undefined)
+    if (ctx.collapsed === undefined) {
       ctx.collapsed = true;
+    }
 
     return ctx;
   };
@@ -284,17 +356,6 @@ function(
     return percentage;
   };
 
-  // gets a pretty name for the download
-  scope.getName = function(d) {
-    if (d.bittorrentName) {
-      return d.bittorrentName;
-    }
-
-    return utils.getFileName(
-      d.files[0].path || d.files[0].uris[0].uri
-    );
-  }
-
   // gets the type for the download as classified by the aria2 rpc calls
   scope.getType = function(d) {
     var type = d.status;
@@ -320,7 +381,7 @@ function(
         settings[i].val = vals[i] || settings[i].val;
       }
 
-      modals.invoke('settings', settings, scope.getName(d) + ' settings', function(settings) {
+      modals.invoke('settings', settings, scope.name + ' settings', function(settings) {
         var sets = {};
         for (var i in settings) { sets[i] = settings[i].val };
 

js/filters/bytes.js

@@ -1,29 +1,9 @@
-(function() {
+angular.module('webui.filters.bytes', ["webui.services.utils"])
-  function fmtlen(len) {
+.filter('blength', ['$filter', "$utils", function(filter, utils) {
-    len = +len; // coerce to number
+  return utils.fmtsize;
-    if (len <= 1024) {
-      return len.toFixed(0)  + " B";
-    }
-    len /= 1024;
-    if (len <= 1024) {
-      return len.toFixed(1) + " KB"
-    }
-    len /= 1024;
-    if (len <= 1024) {
-      return len.toFixed(2) + " MB";
-    }
-    len /= 1024;
-    return len.toFixed(3) + " GB";
-  }
-
-  angular .module('webui.filters.bytes', [])
-  .filter('blength', ['$filter', function(filter) {
-    return fmtlen;
 }])
-  .filter('bspeed', ['$filter', function(filter) {
+.filter('bspeed', ['$filter', "$utils", function(filter, utils) {
-    return function(speed) {
+  return utils.fmtspeed;
-      return fmtlen(speed) + "/s";
-    };
 }])
 .filter('time', function() {
   function pad(f) {
@@ -43,5 +23,3 @@
     return days + "::" +  pad(hrs) + ":" + pad(mins) + ":" + pad(secs);
   };
 });
-})();
-

js/services/utils.js

@@ -26,7 +26,28 @@ angular.module('webui.services.utils', [])
     };
   })();
 
-  return {
+  var utils = {
+
+    fmtsize: function(len) {
+      len = +len; // coerce to number
+      if (len <= 1024) {
+        return len.toFixed(0)  + " B";
+      }
+      len /= 1024;
+      if (len <= 1024) {
+        return len.toFixed(1) + " KB"
+      }
+      len /= 1024;
+      if (len <= 1024) {
+        return len.toFixed(2) + " MB";
+      }
+      len /= 1024;
+      return len.toFixed(3) + " GB";
+    },
+
+    fmtspeed: function(speed) {
+      return utils.fmtsize(speed) + "/s";
+    },
     // saves the key value pair in cookies
     setCookie: function(key, value) {
       var exdate = new Date();
@@ -70,31 +91,29 @@ angular.module('webui.services.utils', [])
       };
     })(),
     randStr: function() {
-      return this.uuid();
+      return utils.uuid();
     },
 
     // maps the array in place to the destination
     // arr, dest (optional): array
     // func: a merge mapping  func, see ctrls/download.js
     mergeMap: function(arr, dest, func) {
-      if (!dest) dest = [];
+      if (!dest) {
-
+        dest = [];
-      for (var i = 0; i < dest.length; i++) {
-        if (i >= arr.length) {
-          // remove the deleted downloads
-          dest.splice(i, dest.length - arr.length);
-          break;
       }
-        if (!dest[i]) dest[i] = {};
 
+      for (var i = 0, e = Math.min(arr.length, dest.length); i < e; ++i) {
         func(arr[i], dest[i]);
       }
 
-      // insert newly created downloads
+      // Insert newly created downloads
       while (i < arr.length) {
         dest.push(func(arr[i++]));
       }
 
+      // Truncate if necessary.
+      dest.length = arr.length;
+
       return dest;
     },
     // get info title from global statistics
@@ -144,4 +163,5 @@ angular.module('webui.services.utils', [])
       return chunks;
     }
   };
+  return utils;
 }]);