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5730c65256
This addresses an issue with the download manager that can cause high CPU usage when there is an active download. The underlying issue is the frequency of updates that the download progress listener receives. Things changed: - reduced the number of null checks in DownloadUtils.jsm's getDownloadStatus function by one (down to two from three). - obtain and format strings from the nsIStringBundle. This removes all the calls to String.replace in DownloadUtils.jsm. - modifies the download manager back-end to update the percentComplete and size property on downloads before dispatching a state changed notification for downloads entering the DOWNLOAD_DOWNLOADING state. This saves us two calls to setAttribute on downloads that we know how big they are, and saves us the same two calls to setAttribute for indeterminate downloads as well as not dispatching a ValueChange event on the progressmeter every time onProgressChange is called on the DownloadProgressListener. - has nsDownload implement nsIClassInfo so we do not need to QueryInterface when going through the list of active downloads in both the download manager's UI and the browser's taskbar UI. |
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| .. | ||
| downloads | ||
| extensions | ||
| handling | ||
| installer | ||
| plugins | ||
| preferences | ||
| readstrings | ||
| shared | ||
| update | ||
| webapps | ||
| xpinstall | ||