Cory Mikhals is on Facebook. Morning Show Host/Asst. Right or wrong, I’m going to defend it.” – Ferris Bueller’s Day Off. It took jurors less than three hours to convict Cory Batey of several counts, including one count of aggravated rape and three counts of aggravated sexual battery. Samsung Developers site has been optimized to Internet Explorer 8 and. PROGRAM; COMMUNITY; prev next. Select from a variety of. 5 th Fire District residents interested in the Smoke Detector Program and Free Battery distribution should contact Fire Official Cory S. Spillar at 732 855-9747 for details. 5 ways to improve battery life in your app. Estelle walks you through five easy things you can do to improve battery life in your mobile web apps. Editor’s Note: Mobile HTML5 is a book by front- end engineer and frequent speaker Estelle Weyl. It is packed with hands- on examples to make you a stronger web developer–including best practices for SVG, Canvas, and CSS3 tailored to fit mobile devices. In the excerpt below, Estelle walks you through five easy things you can do to improve battery life in your mobile web apps. As throughout the book, the tips she provides come from her own real- life experience with these technologies. Unlike desktop computers that are tethered to the wall at all times, and even laptop computers that are generally used by stationary users, mobile users do not recharge their devices throughout the day. Mobile users expect their devices to last, at a minimum, 2. Your users do realize that calls and GPS usage consume battery power. However, if they think they. It is our job, as developers, to manage the power consumption of our code. You have likely noticed that CPU usage drains the battery on your laptop when unplugged.
CPU usage drains the battery on mobile devices just as effectively. Anything that makes your laptop churn, warm up, or turns your computer. Code defensively: expect that your mobile device users are not plugged in. To manage the energy consumption of our code, we need to manage CPU usage. Minimize both size and activity of your Java. Script. Always use CSS, rather than Java. Script, for animations. And even though the marketing teams of devices that support Web. GL insist that their devices are optimized, don. Web. GL battery performance is improving. Use dark colors. The brighter the colors in your design, the brighter the screen has to be. For phones with AMOLED screens, the brighter the screen, the more energy is consumed, draining the battery. AMOLED, or active- matrix organic light- emitting diode, screens are made of a thin layer of organic polymers that light up. Because there is no backlight, they can be very thin. Black pixels are actually turned off, saving battery life. For these non- LCD screen devices, lighter shades consume more energy during display than darker shades. Obviously, there are issues other than battery consumption affecting the decision on what colors are used in application design. Just note that the amount of energy consumed by websites can differ significantly depending on the colors used in the design on certain devices. Colors are by far not the only feature affecting battery consumptions. Media elements like background images, foreground images, video, audio, animations, and Java. Script all contribute to battery drainage. If you can, pick darker colors. JPEG compresses images better and is faster to render, and is therefore more energy efficient. Rendering images consumes energy. Depending on the number, size, and type of images in your site, rendering images can be responsible for a significant percentage of the energy used. The energy required to render images is proportional to number and size of the images rendered. JPEGs use less energy to render than GIFs and PNGs: according to the study “Who Killed My Battery: Analyzing Mobile Browser Energy Consumption,” JPEG is the most energy efficient format for all image sizes. By using JPEGs, you. The type of image format you use affects energy consumption during rendering of the image. This impact is replayed when the image is redrawn to a different size. As we noted earlier, lighter colors consume more energy during extended display. When we are talking about image rendering costs, we are talking about the device decoding, resizing, and drawing out the image, not the energy costs once a static image is displayed. Reduce Java. Script. While raster images are the biggest bandwidth hogs and all images are memory hogs, they. To conserve battery power and memory usage, minimize both the size and activity of your Java. Script. When the browser hits a < script> tag, the browser ceases downloading additional assets and rendering the assets it has already downloaded until the Java. Script is downloaded, parsed, and executed. The browser also does not start parsing and executing the script file until it is fully downloaded. Which you already know. What you may have never thought about is the memory and energy used by Java. Script. Every time an AJAX call is made, the device. Every time Java. Script is parsed, energy is consumed. While a site may cache the Java. Script file, it still parses and executes the Java. Script on every page load. Dynamic Java. Script, like XMLHttp. Request, increases rendering cost and can. Every time an event handler handles an event, Java. Script gets executed. Every time a set. Timeout iterates, Java. Script gets executed. These all consume energy. The download, parsing, and execution of Java. Script can be the most energy- consuming web page component. Sometimes the Java. Script isn! Only include Java. Script frameworks if you actually need them. I have seen sites include j. Query just to simply select an element, and other similar things that are easy to do with selectors and/or native Java. Script. For example, to add the class of first to the first list item in every unordered list, you could use j. Query, but you don. And while 3. 4 KB is not a huge amount of bytes, especially in comparison to the image size that people are adding to their sites, if you include j. Query, while the j. Query file may be cached, it is still parsed and executed with every page load. While a single page load won. And unlike when your user is using GPS or playing a movie, they aren. I am just arguing that you should make sure you really need to include the framework before doing so because you are not only wasting memory and bandwidth, but you. We have query. Selector() and query. Selector. All() for that. Try - webkit- overflow- scrolling: touch instead. And if you must have scrolling down perfect, along with the little bounce, use a script. Use a library when you must, but think long and hard about whether you really need the extra bytes, HTTP request, memory usage, and battery drain before doing so. Eliminate network requests. Obviously you need to download the files required to load your web application. This uses battery, but is necessary. However, polling the Facebook, Twitter, and Pinterest servers every 1. If your application needs to be real time, such as a chat or a sports game, you will want to spend battery power by keeping the connection alive at all times. If your application is not polling for a necessary purpose (Facebook like counts are not necessary, and annoying), let your mobile device terminate the connection to the cell tower. Establishing and maintaining radio links to cell towers consumes battery power. When the device is not making requests, it shuts down connectivity processes to save battery. This is a good thing. While most performance arguments revolve around input and output of data, the number one battery drain in a mobile phone is radio. To preserve battery life, mobile devices put the radio in a preserving power mode when the transmissions are complete and into a deep sleep state after a few seconds of network inactivity. After the radio link is idle for 5 seconds, it drops to a state of half power consumption and significantly lowers bandwidth. After another 1. 2 seconds of inactivity it drops to the idle state. From the idle state it takes time to reach full power and bandwidth. If you are polling your server every 1. Waking the radio can take up to 2 to 3 seconds, taking multiple round trips just to get to a state where your application can transmit. If your application needs to keep the connection alive, do so. Yes, you should be doing that, too. But when it comes to limited battery life, you want to manage browser CPU usage caused by your web application. Whatever makes your laptop fan turn on will also drain the battery of any device. One solution is to hardware accelerate all animations. Hardware acceleration means rendering your animations on the GPU instead of the CPU. The graphicschip requires less power than the device. Hardware acceleration carries out all drawing operations that are performed on a View. Hardware- accelerated images are composited, using four times the memory of the original. Because of the increased resources required to enable hardware acceleration, your application will consume more RAM, but less battery power. With constrained memory and battery life, always consider battery and memory consumption when designing and developing your applications. Hardware acceleration has both benefits and drawbacks. Your animation will appear less janky on the GPU, and you will lose less battery. However, your memory is limited. In other words, transform: translatez(0); is not a panacea. In fact, to reduce the traffic between CPU and GPU, it is recommended that you put all elements that are going to be animated on the GPU on load. If you are going to hardware accelerate an element at any time, keep that element hardware- accelerated at all times. Repaints are generally cheap, but can be expensive, as the visibility of all the nodes in the DOM tree and all the layers of each node must be measured. Repaints can be costly when alpha transparency is involved. Rendering alpha transparent blurs such as shadows or alpha transparent gradients will always take more time to render, as the browser needs to calculate the resulting color of every pixel based on the transparency over the color underneath it. This occurs even if the color, in the end, is not visible because of a design element on top of it, as CSS properties like background image and shadows are drawn from back to front. The time to paint is really ridiculously fast. Generally, optimizing other areas will give you more bang for your buck. However, if you are repainting repeatedly, such as a non- hardware- accelerated transition or animation, minimizing repaint time is vital. In animating, the browser must repaint the nodes being animated in generally less than 1. Windows 7 won't go to sleep when on battery power. Hi Wkrueger,Sorry, to know that you are facing this issue. According to Power Configuration report it seems that there is an issue with USB drivers. Let’s try this methods and check if it helps. If you are using Windows 8 refer this article: USB devices could rarely enter into selective suspend on Windows 8. Try the below mentioned methods and see if it helps. Method 1: Try to run Power Troubleshooter which is built in troubleshooter and you may follow the steps mentioned below to run it. Click Start, click on Control panel. In the search box of Control Panel type Troubleshooter, and select. Under System and Security, click Improve power usage. Now try to run the troubleshooter and check if it helps. Note: If you're prompted for an administrator password or confirmation, type the password or provide confirmation. If issue persist, proceed to next method. Method 2: If issue persist, I would suggest you to. Reset and restore the power plans to default. Press Windows key and X at the same time. Choose Command Prompt (Admin) from the context menu. In the command prompt, type powercfg –restoredefaultschemes. Enter. Exit command prompt. Note: This would reset the power plan settings to default. Any customized power plans would be removed. If issue persist, proceed to next method. Method 3: You may check if the option to “Allow the computer to turn off this device to save power” is enabled and enable the option. To check the settings follow the steps below: 1. Type in Device Manager into the start menu search box Press enter. Scroll down to “USB” and find your USB device. Right- click on it and choose Properties from the menu. In the dialog box, choose the Power Management tab. Check the box next to “Allow the computer to turn off this device to save power” and “Allow this device to wake the computer”. Click on Apply and Ok. Also try updating the Graphic card and chipset drivers from your computer manufacturer website. If you need further assistance with Windows, let us know and will be glad to help.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
January 2017
Categories |