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Fastest way to determine if an integer's square root is an integer
...that works ~35% faster than your 6bits+Carmack+sqrt code, at least with my CPU (x86) and programming language (C/C++). Your results may vary, especially because I don't know how the Java factor will play out.
My approach is threefold:
First, filter out obvious answers. This includes negative nu...
What is the difference between Google App Engine and Google Compute Engine?
...s offers app engine applications a bit more flexibility over app platform, CPU and memory options. Like GCE you can create a custom runtime environment in these VMs for app engine application. Actually Managed VMs of App Engine blurs the frontier between IAAS and PAAS to some extent.
...
Is there a unique Android device ID?
... "35" + (Build.BOARD.length() % 10) + (Build.BRAND.length() % 10) + (Build.CPU_ABI.length() % 10) + (Build.DEVICE.length() % 10) + (Build.MANUFACTURER.length() % 10) + (Build.MODEL.length() % 10) + (Build.PRODUCT.length() % 10);
// Thanks to @Roman SL!
// https://stackoverflow.com/a/4789483...
What is the strict aliasing rule?
...ut aliasing, it can omit those instructions, load buff[0] and buff[1] into CPU registers once before the loop is run, and speed up the body of the loop. Before strict aliasing was introduced, the compiler had to live in a state of paranoia that the contents of buff could change at anytime from anywh...
Window Features - 更多技术 - 清泛网 - 专注C/C++及内核技术
...d windows.
Each thread has a priority level that determines the amount of CPU time the thread receives. Although an application can set the priority level of its threads, normally the foreground thread has a slightly higher priority level than the background threads. Because it has a higher priorit...
How to get started with developing Internet Explorer extensions?
... 8 will not load your add-on when starting unless you will build with "Any CPU" architecture and register using both 32 and 64 bit RegAsm.exe." was an edit by someone that got rejected.
– Matsemann
May 4 '13 at 19:24
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What are the barriers to understanding pointers and what can be done to overcome them? [closed]
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Take a basic CPU, say something that runs lawnmowers or dish washers and implement it. Or a very very basic subset of ARM or MIPS. Both of those have a very simple ISA.
– Daniel Goldberg
Dec 12 '09 a...
How to make an OpenGL rendering context with transparent background?
...tions. Copying GPU data to the RAM for each frame is very demanding on the CPU, resulting in low FPS. Check the comments on this answer: stackoverflow.com/questions/4780756/…
– karlphillip
Feb 8 '11 at 16:57
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How does the compilation/linking process work?
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The skinny is that a CPU loads data from memory addresses, stores data to memory addresses, and execute instructions sequentially out of memory addresses, with some conditional jumps in the sequence of instructions processed. Each of these three ...
Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
...ause non-conforming programs to no
longer work as expected, such as SPEC CPU 2006 464.h264ref and
416.gamess. A new option, -fno-aggressive-loop-optimizations, was added to disable this aggressive analysis. In some loops that have
known constant number of iterations, but undefined behavior is ...