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Fastest sort of fixed length 6 int array
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@tgwh: XOR swap is almost always a bad idea.
– Paul R
Jun 25 '13 at 15:20
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Is recursion ever faster than looping?
...ther position: e.g.: store m[4] m[8]
b) Logic and arithmetic
and, or, xor, not
add, sub, mul, div. e.g. add m[7] m[8]
An Executing Agent: a core in a modern CPU. An "agent" is something that can execute instructions. An Agent can also be a person following the algorithm on paper.
Order of step...
How do I make a list of data frames?
...ic indices to access your data frames (and you can use both, this isn't an XOR choice).
Overall, using lists will lead you to write cleaner, easier-to-read code, which will result in fewer bugs and less confusion.
share
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STL or Qt containers?
...ture, if need be.
The same is true of doubly linked lists, which could use XOr linking to drastically reduce space used. Again, this is impossible with Qt, due to it's requirements for growth and COW.
COW can indeed make something lighter, but so can Intrusive Containers, such as supported by boost,...
Do sealed classes really offer performance Benefits?
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0000000d je 00000014
0000000f call 70032C33
00000014 xor edx,edx
00000016 mov dword ptr [ebp-4],edx
00000019 mov ecx,588230h
0000001e call FFEEEBC0
00000023 mov dword ptr [ebp-8],eax
00000026 mov ecx,dword ptr [ebp-8]
00...
What is the difference between native code, machine code and assembly code?
...3 C4 04 add esp,4
return 0;
00401020 33 C0 xor eax,eax
}
00401022 5D pop ebp
00401023 C3 ret
I didn't annotate it, mostly because it is so similar to the machine code generated by the C# program. The printf() functi...
Heap vs Binary Search Tree (BST)
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@Yeo: Heap is better for findMin xor findMax. If you need both, then BST is better.
– Mooing Duck
Apr 9 '15 at 21:14
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How to count the number of set bits in a 32-bit integer?
... ret
unsigned test_u64(unsigned long long a) { return popcount(a); }
xor eax, eax # gcc avoids false dependencies for Intel CPUs
popcnt rax, rdi
ret
PowerPC64 gcc -O3 -std=gnu++11 emits (for the int arg version):
rldicl 3,3,0,32 # zero-extend from 32 to 64-bit
p...
Best explanation for languages without null
... What's wrong with assert(actionSheet ^ alertView)? Or can't your language XOR bools?
– cat
Jun 23 '16 at 11:28
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Approximate cost to access various caches and main memory?
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0.1 ns - NOP
0.3 ns - XOR, ADD, SUB
0.5 ns - CPU L1 dCACHE reference (1st introduced in late 80-ies )
0.9 ns - JMP SHORT
1 ns - speed-of-light (a photon) travel a 1 ft (30.5cm) distance -- will st...