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Is R's apply family more than syntactic sugar?
... It does vary with OS and R version... and in an absolute sense CPU. I just ran with 2.15.2 on Mac and got sapply 50% slower than for and lapply twice as fast.
– John
Jan 13 '13 at 0:08
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What are important languages to learn to understand different approaches and concepts? [closed]
...oreover, it is also a very universal, C compilers exist for (almost) every CPU architecture ever devised.
– dietr
May 12 '11 at 8:05
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How can HTML5 “replace” Flash? [closed]
...lash ads, but it is flash. Now on a mobile phone an ad that can cause the cpu to spike to 100% is not good and I stand by SJ assertion that Flash is harmful.
– graham.reeds
May 26 '10 at 11:00
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【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...用send_LL(0x53,2402M)（注：2402M为信道频率）。这里还有一个问题，设备B怎么知道这个数据包是发给自己的还是其他人的，为此BLE引入access address概念，用来指明接收者身份，其中，0x8E89BED6这个access address比较特殊，它表示要发给周...
Why does C++ need a separate header file?
...ough additional information to load and link the code. Then, you point the CPU at the entry point, and let it run. This is fundamentally different from Java or C#, where the code is compiled into an intermediary bytecode containing metadata on its contents.
– DevSolar
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Java 8: performance of Streams vs Collections
... I think your test is fair, you just need a machine has more cpu cores.
– Mellon
Nov 19 '15 at 19:34
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Proper practice for subclassing UIView?
...s. Personally, I avoid multi-pass layouts when possible because they burn CPU cycles and make everything a headache. Additionally, I put constraint code in the initializers themselves as I rarely invalidate them.
import UIKit
class MyView: UIView {
//------------------------------------------...
How much is the overhead of smart pointers compared to normal pointers in C++?
...tps://vimeo.com/131189627
It goes deep into the implementation details and CPU architecture for write barriers, atomic locks etc. once listening you will never talk about this feature being cheap. If you just want a proof of the magnitude slower, skip the first 48 minutes and watch him running examp...
Why is String.chars() a stream of ints in Java 8?
...or unboxing within an inner loop, you'd see that it can impose significant CPU and garbage collection overhead.
When designing the Streams API, it was clear that we had to support primitives. The boxing/unboxing overhead would kill any performance benefit from parallelism. We didn't want to support...
Do on-demand Mac OS X cloud services exist, comparable to Amazon's EC2 on-demand instances? [closed]
...e pricing plans), 2: it looks like pricing is not based on clock hours but CPU hours, which is appealing, but a little awkward, 3: permanency of data and configurations (a la EBS and AMIs) isn't clear. Nonetheless their $8 daily pass doesn't sound bad.
– Iterator
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