Make a register depend on another one without changing its value...

Do complex addressing modes have extra overhead for loads from memory?...

JavaScript: Faster roulette selection...

Unsure if passing by reference is working...

What methods can be used to efficiently extend instruction length on modern x86?...

Using RSI/RDI vs r8-r15 (speed optimization)...

Numpy performance gap between len(arr) and arr.shape[0]...

C++: can I reuse / move an std::list element from middle to end?...

Does any of current C++ compilers ever emit "rep movsb/w/d"?...

Aligning a given instruction, but putting the alignment padding somewhere other than immediately bef...

Accessing arbitrary 16-bit elements packed in a 128-bit register...

Loading an xmm from GP regs...

What type of addresses can the port 7 store AGU handle on recent Intel x86?...

Is there a safe way to specify the value of an object may be uninitialized because it is never used?...

Conflicting signs in x86 assembly: movsx then unsigned compare/branch?...

Only pass if-statement once...

Check if buffer was used in last query...

Z80: Copying from Top of Stack to HL...

Why does declaring a counter variable outside of a nested function make a loop 5x slower?...

Why bitoperation and multiplication is prefered here over a condition?...

How efficient is an if statement compared to a test that doesn't use an if? (C++)...

XOR all bytes in 64 bit register in fewer instructions...

May there be any penalties when using 64/32-bit registers in Long mode?...

How can I unit test performance optimisations in C#?...

Can the compiler/JIT optimize away short-circuit evaluation if there are no side-effects?...

How to force NASM to encode [1 + rax*2] as disp32 + index*2 instead of disp8 + base + index?...

Does each Floating point operation take the same time?...

Why does gcc compile f(1199) and f(1200) differently?...

Is it faster to pop unneeded values from the stack, or add an immediate constant to SP on a 386+ CPU...

How can I optimize this graphic-sprite-emulation routine?...