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Free smart phone apps might seem like a deal. But they can have a hidden cost: your phone's battery life. That's because free apps often serve up ads, which can drain your battery more than using the app itself does.
智能手機(jī)的免費(fèi)應(yīng)用程序看起來(lái)很劃算，但其中暗含著隱藏成本：手機(jī)的電池壽命。這是因?yàn)槊赓M(fèi)軟件往往是用來(lái)支持廣告的，而廣告比應(yīng)用軟件本身更容易將你的電池能量耗光。
Researchers built a tool called Energy Profiler, which breaks down how apps consume energy. Then they analyzed popular free Android apps like Angry Birds and Free Chess. Turns out both apps used only a quarter of their total consumed energy on game-play. The other three quarters went to advertising—things like user tracking, uploading user info and downloading ads. The findings were presented at the European Conference on Computer Systems. So, just as there’s no such thing as a free lunch, there are really no free apps.
研究人員建立了一個(gè)叫做能量探測(cè)器的工具，用來(lái)觀察應(yīng)用軟件是如何消耗掉電池能量的。然后，他們分析了幾款當(dāng)下流行的免費(fèi)安卓（Android）應(yīng)用程序（像憤怒的小鳥(niǎo)和免費(fèi)的國(guó)際象棋）。結(jié)果顯示，這兩個(gè)應(yīng)用程序本身所消耗的電池能量只占游戲消耗能量的四分之一。剩余的四分之三則完全用在了廣告上，例如用戶跟蹤、用戶信息上傳和廣告下載。這項(xiàng)研究結(jié)果是在歐洲計(jì)算機(jī)系統(tǒng)會(huì)議上公布的。所以說(shuō)，既然沒(méi)有免費(fèi)午餐這樣的好事，也就沒(méi)有真正免費(fèi)的應(yīng)用程序。
The research team found a different energy leak when they did a Google search on the Android browser. The search happened in a blink. But the phone's 3G hardware stayed in high power mode for up to seven seconds afterward, eating up much more energy than the search itself. You may not be able to avoid that energy suck—the researchers say it's just how 3G networks behave.
該研究小組在用安卓（Android）瀏覽器進(jìn)行谷歌搜索時(shí)，還發(fā)現(xiàn)了另外一個(gè)導(dǎo)致電池能量泄漏的原因。研究人員的這個(gè)搜索就在一瞬之間，但之后 3G手機(jī)的硬件處在高功率模式下的時(shí)間高達(dá)7秒，由此消耗的電池能量遠(yuǎn)遠(yuǎn)高于搜索本身所消耗的能量。你無(wú)法避免這樣的能量消耗——因?yàn)檫@就是3G網(wǎng)絡(luò)的工作模式，研究人員如是說(shuō)。
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