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Secure hash and salt for PHP passwords
...tching is now a critical feature of password mechanisms due to much faster CPUs and the use of GPUs and FPGAs to crack passwords at rates of billions of guesses per second (with GPUs).
For example, you can crack all 8-character Windows passwords in 6 hours using 25 GPUs installed in 5 desktop PCs. ...
Load and execution sequence of a web page?
...llision that causes a code crash.
Of the above steps the one that is most CPU intensive is the parsing of the DOM/CSS. If you want your page to be processed faster then write efficient CSS by eliminating redundent instructions and consolidating CSS instructions into the fewest possible element ref...
How to decide when to use Node.js?
... have a lot of concurrent connections and each request only needs very few CPU cycles, because the event loop (with all the other clients) is blocked during execution of a function.
A good article about the event loop in Node.js is Mixu's tech blog: Understanding the node.js event loop.
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How do I uniquely identify computers visiting my web site?
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Data has to be encrypted / decrypted and signed / verified which creates cpu overhead on client (not so bad) and server (bah!).
Data is deleted when user deletes their cookies and cache. (this is what I want really)
Data is unavailable for analytics when users go off-line. (analytics for currently...
How to install the Raspberry Pi cross compiler on my Linux host machine?
...torial also supports older Rasperry Pi (A, B, B+, Zero) based on the ARMv6 CPU.
See also:
GCC 8 Cross Compiler outputs ARMv7 executable instead of ARMv6
Set up the toolchain
There is no official git repository containing an updated toolchain (See https://github.com/raspberrypi/tools/issues/102).
...
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.
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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...
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...
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...
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...