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JSON and XML comparison [closed]
...erformance reports, conducted by the W3C, as efficiency and low memory and CPU footprint, is also a matter for the XML area too: Efficient XML Interchange Evaluation.
Update 2015-03-01
Worth to be noticed in this context, as HTTP overhead was raised as an issue: the IANA has registered the EXI enc...
How slow are .NET exceptions?
...are implemented as Win32 SEH exceptions, so some will even pass the ring 0 CPU boundary!
Obviously in the real world, you'll be doing a lot of other work so the odd exception will not be noticed at all, but if you use them for program flow expect your app to be hammered. This is another example of ...
Best approach to real time http streaming to HTML5 video client
... HTML5 client (involves re-encoding, so expect quality loss and needs some CPU-power):
Set up an icecast server (could be on the same machine you web server is on or on the machine that receives the RTSP-stream from the cam)
On the machine receiving the stream from the camera, don't use FFMPEG but...
What are the dangers when creating a thread with a stack size of 50x the default?
...d the local variables in a method. Minus the ones that can be stored in a CPU register, you can ignore that since there are so few of them.
Increasing the stack size doesn't accomplish anything, you'll just reserve a bunch of address space that will never be used. There is no mechanism that can e...
What is the performance cost of having a virtual method in a C++ class?
...cache misses on execution (deliberately, since I was trying to examine the CPU pipeline in isolation), so they discount that cost.
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Python Process Pool non-daemonic?
...getting memory leak with this try using "with closing(MyPool(processes=num_cpu)) as pool:" to dispose of the pool properly
– Chris Lucian
Mar 15 '15 at 7:00
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What are the different usecases of PNG vs. GIF vs. JPEG vs. SVG?
...t unless it's stored locally on an SSD, I'd assume getting the file to the CPU to process will be slower than just processing a JPG, especially on a properly-written JPG decoder that uses hardware instructions that have been available for a decade or two.
– Camilo Martin
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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...
Count(*) vs Count(1) - SQL Server
..., query store overhead, triggers, etc.). It is maybe a few thousand extra CPU instructions. So, count(1) does a tiny bit less work during compilation (which will usually happen once and the plan is cached across multiple subsequent executions). For execution time, assuming the plans are the same ...
In which order should floats be added to get the most precise result?
...bly avoid using -ffast-math but that in many applications where you may be CPU-bound but don't care about precise numerical computations, (game programming for instance), -ffast-math is reasonable to use. Thus, I'd like to ammend my strongly worded "banned" comment.
– Chris A....