上周公布的测试版速度很快，但是也很容易造成锁机——算是达到了大部分测试版程序的水准。
Test drives last week were speedy but also very crash prone-par for most alpha tests.
微软还指出，这款最新的预览版还包含一些速度上的改善。
Microsoft also notes that this latest preview also includes some speed improvements.
你将注意到的另一个好处是，这一版启动速度更快、占用内存更小。
Another benefit that you'll notice in this release is faster startup times and a smaller memory footprint.
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