[gnome-shell] Limit dash docs to 50

[Colin Walters <walters src gnome org>]

commit a8d18ac18a8177b971896be7c5c666a0e720f535
Author: Colin Walters <walters verbum org>
Date:   Mon Dec 7 21:48:31 2009 -0500

    Limit dash docs to 50
    
    We has poor performance if we try to allocate hundreds of actors;
    a bit more ideally, we'd keep pulling as much as we can, but really
    no one should have more than 50 in the list as is now except on
    unreasonably large screen sizes.
    
    In the future we should change this to be pull-on-demand thing
    in a chunked fashion.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=603522

 js/ui/docDisplay.js |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/docDisplay.js b/js/ui/docDisplay.js
index 6afcf4f..9ba6c4c 100644
--- a/js/ui/docDisplay.js
+++ b/js/ui/docDisplay.js
@@ -16,6 +16,7 @@ const DND = imports.ui.dnd;
 const GenericDisplay = imports.ui.genericDisplay;
 const Main = imports.ui.main;
 
+const MAX_DASH_DOCS = 50;
 const DASH_DOCS_ICON_SIZE = 16;
 
 const DEFAULT_SPACING = 4;
@@ -453,7 +454,7 @@ DashDocDisplay.prototype = {
         // Should be kept alive by the _actorsByUri
         this.actor.remove_all();
         let docs = this._docManager.getTimestampOrderedInfos();
-        for (let i = 0; i < docs.length; i++) {
+        for (let i = 0; i < docs.length && i < MAX_DASH_DOCS; i++) {
             let doc = docs[i];
             let display = this._actorsByUri[doc.uri];
             if (display) {