![]() Specifically, developers might want to build websites that adapt to different battery situations to overcome any user-perceived responsiveness issues inflicted by the battery-saver mode.Īdditionally, to reduce utilization of the throttled CPU, users may use browsers that offload CPU-intensive computations to the cloud ( 50 6 8). ![]() The above findings demonstrate a clear need for new website design goals that would go hand-in-hand with the understanding of how user devices with low battery charge levels could degrade the mobile Web experience. The data also suggest that the battery-saver mode makes a higher impact on Web performance when Web pages load in faster mobile network conditions. Inferences Drawn: Using a large-scale mobile Web performance dataset, we discover that under battery-saver mode, select phones from Huawei, Sony Xperia, and Samsung Galaxy series degrade mobile Web performance metrics, such as the page load time (PLT), time to first paint (TTFP), total LongTask time, time to interactive (TTI), and frame rate ( 35 5 30 2). Simply put, do mobile websites load slower on Android phones when the battery charge levels drop below a certain threshold? Since all these tasks make use of the device’s CPU resources, in this paper we seek to investigate whether or not a throttled CPU clock speed under an active battery-saver mode degrades the mobile Web performance for the end-user. The process of loading Web pages includes HTML parsing, downloading and processing of JavaScript, Cascading Style Sheets (CSS), image resources, executing computationally-heavy JavaScript, and building the Document Object Model (DOM), CSS Object Model (CSSOM), and render tree (Grigorik, 2018). ![]() More specifically, Android smartphones have a battery-saver mode that lowers the battery consumption when the charge level drops below a certain threshold.Īmong other things, the battery-saver mode reduces the device’s performance by throttling the CPU clock speed, where it deactivates the power-hungry and faster processor cores and activates the battery-saving and slower processor cores (Grigorik, 2016). Goals that treat slow (and throttled-CPU) devices kindly in favor of improvingĮnd-user experience and suggest that Web performance measurements should beĪware of user device battery charge levels to correctly associate Web Finally, we encourage for new website design Battery-saver mode on newer flagship smartphones, however, does not Sudden or gradual degradation in Web performance when battery-saver mode isĪctive. Suggests that users of select smartphones of Huawei and Sony experience a We utilize a large-scale data-set collected by a real user monitoring system ofĪ major content delivery network to investigate the impact of Android'sīattery-saver mode on various mobile Web performance metrics. The transitionįrom using faster processor cores to using slower processor cores throttles theĬPU clock speed on the device, and therefore impacts the webpage load process. ![]() The battery-conserving and slower processor cores on the device. Option to extend battery life, Android offers a battery-saver mode that whenĪctivated, turns off the power-hungry and faster processor cores and turns on Increased power consumption and reduced battery life on mobile devices. However, increased CPU performance comes with Required to perform these tasks as quickly as possible and provide the user Model, a Cascading Style Sheets Object Model, and render trees, and parse,Ĭompile, and execute computationally-heavy JavaScript. ![]() A Web browser utilizes a device's CPU to parse HTML, build a Document Object ![]()
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