移动市场最新的关注点都集中在安卓 64 位系统。2013 年 9 月，Apple 发布了采用板载 64 位 A7 处理器的 iPhone* 5，进而掀起了新一轮移动技术竞争。
推出 Android L 后，虚拟机编译器将迁移至 ART （Android 运行时），而且仅迁移至面向 64 位的 ART。 ART 与 Dalvik 之间相比如何，这对于应用代码而言又意味着什么？
ART 是 AOT（提前）编译器，这表示 dex2oat 在应用初始安装过程中运行一次。 Dalvik 是 JIT（实时）编译器，仅在调用时运行。 为了获得更长的应用安装时间，ART 仅在调用应用之后释放处理器。 此外，新的垃圾回收程序和内存分配程序将减少暂停的次数和时间，这表示 ART 可提供更出色的响应能力并减少能耗。 但是请注意，运行时内存占用空间较少同样意味着编译二进制需要更高的存储。 ART 将配合 ARM、x86 和 MIPS 硬件一起使用，并在运行浮点运算时显示出极大的改进。
代码有何变化？ ART 向后兼容，可以使用 Dex （Dalvik 可执行代码）字节代码格式。 因此，多数应用可以直接运行（甚至性能更高）。
With Android L, the virtual machine compiler will move to ART (Android RunTime) and only ART for 64 bit. So what do we know about ART vs Dalvik and what does it mean for App code?
In the Palazzo Vecchio in Florence, Italy, a feverish search occurs seemingly in slow motion. In order to make progress in the search, a team of researchers from the University of California/San Diego has been inventing a brand new field of work called art forensics.
Cross-posted from the Yocto Blog, www.yoctoproject.org. Would love to get your feedback here.
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This year Caltech hosted the Humanity+ conference. I had been given a press pass to attend, but for a variety of reasons, plus perhaps a bit of stay at home fever on my part I chose to send my avator to the conference instead, no, actually I streamed it instead. I sat transfixed in front of my computer for most of the first day and for as as much as I had time to the second day which was unfortunately just a few hours. I am only going to touch upon some of the many ideas that were discussed, and hope I do justice to them. Please forgive me if I misquote anyone.