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What's the difference between utf8_general_ci and utf8_unicode_ci?
...ligible. It was devised in a time when servers had a tiny fraction of the CPU performance of today's computers.
Benefits of utf8mb4_unicode_ci over utf8mb4_general_ci
utf8mb4_unicode_ci, which uses the Unicode rules for sorting and comparison, employs a fairly complex algorithm for correct sortin...
Image comparison - fast algorithm
... it would require an array of 1 million 64-bit hash values (8 MB). On some CPUs this fits in the L2/L3 cache! In practical usage I have seen a corei7 compare at over 1 Giga-hamm/sec, it is only a question of memory bandwidth to the CPU. A 1 Billion-image database is practical on a 64-bit CPU (8GB RA...
Simulator or Emulator? What is the difference?
...virtualisation is a superset of emulation, in that can provide accelerated CPU support, exclusive hardware device access, etc.
– Lee B
Oct 18 '09 at 13:30
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NVIDIA vs AMD: GPGPU performance
... same value ($) cards.
In both cases, speeds were ~10x-30x comparing to a CPU.
I didn't test CUDA, but I doubt it could solve my random memory fetch problems magically. Nowadays, CUDA and OpenCL are more or less the same, and I see more future on OpenCL than on CUDA. The main reason is that Intel ...
Microsecond timing in JavaScript
...lps me invalidate results that has probably been too adversely affected by CPU fluctuations).
It's become so accurate in some GPU accelerated browsers on i7 quad-core systems (when the browser window is the only window), that I've found I wished I could access a 0.1ms precision timer in JavaScript,...
What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++?
...ing further might break if incrementing the pointer causes an overflow, on CPU's which don't just treat pointers as integers.
– jalf
Aug 11 '10 at 14:32
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Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
...differ by a a multiple of 4096 have a false dependency on Intel SnB-family CPUs. (i.e. same offset within a page). This can reduce throughput when some of the operations are stores, esp. a mix of loads and stores.
– Peter Cordes
Mar 18 '16 at 1:52
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asynchronous vs non-blocking
...ng (you can say that most of time this loop does something nonsense but in CPU's eyes, X is running, which means that X is non-blocking) whereas X and Y are synchronous because X can't continue to do any other things(X can't jump out of the loop) until it gets the book from Y.
Normally in this case,...
How to create a sub array from another array in Java?
... something like REP STOSW by the JIT (in which case the loop is inside the CPU).
int[] src = new int[] {1, 2, 3, 4, 5};
int[] dst = new int[3];
System.arraycopy(src, 1, dst, 0, 3); // Copies 2, 3, 4 into dst
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How to sum up an array of integers in C#
...= arr.AsParallel().Sum(); a faster version that uses multiple cores of the CPU. To avoid System.OverflowException you can use long sum = arr.AsParallel().Sum(x => (long)x); For even faster versions that avoid overflow exception and support all integer data types and uses data parallel SIMD/SSE in...