How to Change the IE9 JavaScript Timer Frequency Power Option Setting in Windows 7
Information
This will show you how to change the setting for the newly introduced Internet Explorer 9 JavaScript Timer Frequency Power Option in Windows 7.
There have been a very few reports of some users having possible increased battery drain or sleep issues with the Maximum and Power Saving settings enabled, respectively. These may or may not be mis-identified issues, but you may want to test out the different settings from the default if they apply to you.
Information
Internet Explorer 9 introduced a new power setting in Windows 7's Power Options, called
JavaScript Timer Frequency. This is tied in with IE9's new JavaScript engine - Chakra.
The apparent reasoning behind the two available settings of this new Power Option are basically summed up by this line in the
IEBlog: An optimized experience on platforms from multi-core desktops to netbooks and mobile devices. User code in an HTML and JavaScript application is mostly single-threaded, but on today’s modern multi-core machines, browsers should find ways to use other cores intelligently to improve performance. At the same time, browsers must also run well on netbooks and low-power machines.
While on the
Power Saving option, this will slow down the execution of JavaScript in Internet Explorer 9 which will also lower power consumption. This is the automatic setting on laptops, netbooks.
Note
The two settings are as follows:
Maximum Performance: (default on desktops/plugged in devices) for optimal JavaScript performance in IE9 when power consumption or battery life is not critical or required.
Maximum Power Savings: (default on laptops, etc) ideal when power consumption and battery life is important, such as a laptop, netbook, etc.
Here's How: 1. Open up the
Control Panel, and go to
Power Options.
2. Click on
Change Plan Settings.
3. Click on
Change Advanced Power Settings, and scroll down where it says
Internet Explorer.
4. Pick either the
Maximum Performance, or
Maximum Power Savings setting that applies
if you wish to change it from the default setting, and click on
OK.
That's it.
Internet Explorer 9 - JavaScript Timer Frequency Power Plan Settings 
