Chrome 57 kicks off the first phase of Google’s throttling plan, a long-term initiative meant to reduce the browser’s energy consumption and impact on CPU resources by killing tabs running in the background. Google puts the blame on background tabs for up to 30% of Chrome’s power consumption, at least on desktops. Alexander Timin, a software engineer at Google, explained in a blog post: Google first disclosed its plan to throttle background tabs last August. The policy applies to tabs that exceed its allotted time for running JavaScript functions called timers. Google engineers believe JavaScript ads and analytics scripts are the major cause of intensive background tasks. With the new background throttling policy, developers will have ample of time to make the necessary adjustments as some website features depend on background operations. We’ve found that this throttling mechanism leads to 25% fewer busy background tabs. In the long-term, the ideal is for background tabs to be fully suspended and instead rely on new APIs for service workers to do work in the background. Chrome will continue to take steps in this direction to prolong users’ battery life, while still enabling all the same experiences developers can build today. Are you using Google Chrome as your default browser? Does the browser consume too much battery power? Let us know.

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