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New posts in micro-optimization
Assembly function address table and data under the function or in data section
Sep 19, 2025
assembly
x86
x86-64
micro-optimization
static-data
Fastest way to set a single memory cell to zero or a constant in x86 assembly?
Sep 19, 2025
assembly
x86
x86-64
zero
micro-optimization
How to exchange between 2 bits in a 1-byte number
Sep 16, 2025
assembly
x86
bit-manipulation
micro-optimization
Bit packing of groups of n repeated bits in a 32-bit word, compact to 1 bit per group
Sep 14, 2025
c
bit-manipulation
micro-optimization
bit-packing
Can the compiler/JIT optimize away short-circuit evaluation if there are no side-effects?
Sep 14, 2025
c#
micro-optimization
short-circuiting
Understanding a specific CIL / CLR optimization
Sep 12, 2025
.net
optimization
compiler-construction
cil
micro-optimization
Fastest way to take the average of two signed integers in x86 assembly?
Sep 07, 2025
assembly
optimization
x86
average
micro-optimization
Why do C compilers still prefer push over mov for saving registers, even when mov appears faster in llvm-mca?
Sep 08, 2025
c
assembly
x86-64
compiler-optimization
micro-optimization
Is the fall-through side of a conditional branch more efficient? Is it a good idea to make that the error-handling side?
Sep 07, 2025
assembly
optimization
x86
micro-optimization
Efficient UTF-8 character-length decoding for a non-zero character in a 32 bit register
Sep 07, 2025
assembly
utf-8
nasm
x86-64
micro-optimization
Advantage of using LEA over MOV for passing parameters in Assembly compiled from C++
Sep 07, 2025
c++
assembly
visual-c++
x86-64
micro-optimization
Is there a faster algorithm for max(ctz(x), ctz(y))?
Sep 03, 2025
c++
algorithm
rust
bit-manipulation
micro-optimization
repz ret: why all the hassle?
Mar 13, 2023
assembly
x86
micro-optimization
amd-processor
branch-prediction
Why _umul128 works slower than scalar code for mul128x64x2 function?
Mar 06, 2023
c++
x86
simd
avx
micro-optimization
How to implement the totalOrder predicate for floating point values?
Mar 04, 2023
assembly
floating-point
x86-64
ieee-754
micro-optimization
ARM Cortex M0+: How to use "Branch if Carry" instructions in C-code?
Mar 04, 2023
c
assembly
arm
compiler-optimization
micro-optimization
can array access be optimized?
Feb 28, 2023
java
arrays
optimization
micro-optimization
How to get lg2 of a number that is 2^k
Feb 05, 2023
performance
bit-manipulation
micro-optimization
logarithm
bitcount
Why is my operator ++ more than twice as fast as its equivalent instance method?
Sep 04, 2025
c#
.net-core
micro-optimization
benchmarkdotnet
_mm256_fmadd_ps is slower than _mm256_mul_ps + _mm256_add_ps?
Sep 02, 2025
gcc
sse
simd
avx
micro-optimization
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