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New posts in 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
x86 Assembly pushad/popad, How fast it is?
Jan 31, 2023
performance
assembly
x86
inline-assembly
micro-optimization
Optimize nested loops for pattern-filling an array, to help the compiler produce efficient ARM assembly?
Jan 27, 2023
c
assembly
arm
micro-optimization
Why this unnecessary MOVAPD copy in gcc 9.1, in a tiny function
Jan 27, 2023
assembly
gcc
x86-64
sse
micro-optimization
x86 opcode alignment references and guidelines
Jan 25, 2023
assembly
x86
x86-64
memory-alignment
micro-optimization
JVM first 4 booleans optimized, not 5th
Jan 12, 2023
java
memory
jvm
micro-optimization
Is there a difference in performance between the child and descendant selectors?
Jan 09, 2023
css
performance
css-selectors
micro-optimization
According to Intel my cache should be 24-way associative though its 12-way, how is that?
Jan 08, 2023
performance
intel
cpu-architecture
cpu-cache
micro-optimization
Can two instructions execute in the same cycle if the same register is used as input and output respectively?
Jan 08, 2023
assembly
x86
x86-64
cpu-architecture
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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