StackOverflow Questions for Tag: micro-optimization

ABu

Reputation: 12299

Performance penalty: denormalized numbers versus branch mis-predictions

c++x86floating-pointmicro-optimizationbranch-prediction

Score: 5

Answers: 2

Poperton

Reputation: 1746

How to auto-vectorize (SIMD) a modular multiplication in Rust

rustsimdmicro-optimizationauto-vectorization

Score: 2

Answers: 1

BadUsernameIdea

Reputation: 230

Is it still worth using the Quake fast inverse square root algorithm nowadays on x86-64?

algorithmoptimizationx86-64micro-optimizationsqrt

Score: 13

Answers: 1

rpax

Reputation: 4496

DateTime.DayOfWeek micro optimization

c#performancedatetimemicro-optimizationdayofweek

Score: 23

Answers: 1

Elliot Gorokhovsky

Reputation: 3762

Generate FMOV without inline assembly

clangsimdarm64micro-optimizationsve

Score: 3

Answers: 2

user2346536

Reputation: 1474

popcount in arm assembly without neon

assemblyarmmicro-optimizationhammingweight

Score: 1

Answers: 3

WilliamKF

Reputation: 43179

Branch on ?: operator?

c++hardwaremicro-optimizationbranchless

Score: 9

Answers: 5

namea hang

Reputation: 11

Which execution ports can SIMD shuffles use for AVX2 and NEON?

cpu-architecturesimdavxneonmicro-optimization

Score: 1

Answers: 1

Andreas

Reputation: 1285

Micro Optimization of a 4-bucket histogram of a large array or list

c#optimizationhistogramsimdmicro-optimization

Score: 3

Answers: 4

George Robinson

Reputation: 2125

Bit packing of groups of n repeated bits in a 32-bit word, compact to 1 bit per group

cbit-manipulationmicro-optimizationbit-packing

Score: 24

Answers: 6

Gilgamesz

Reputation: 5073

INC instruction vs ADD 1: Does it matter?

performanceassemblyx86incrementmicro-optimization

Score: 61

Answers: 2

Hassan Syed

Reputation: 20496

boost::thread data structure sizes on the ridiculous side?

c++boost-asioboost-threadmicro-optimizationsystems-programming

Score: 7

Answers: 6

Hassan Syed

Reputation: 20496

Why is clang's `-O3` alloca 2x faster than g++ on a simplistic alloca benchmark

memory-managementclangcompiler-optimizationmicro-optimizationalloca

Score: 5

Answers: 1

Ben

Reputation: 9723

Why can't GCC generate an optimal operator== for a struct of two int32s?

c++gccx86-64compiler-optimizationmicro-optimization

Score: 87

Answers: 3

Victor Liu

Reputation: 3653

Verifying compiler optimizations in gcc/g++ by analyzing assembly listings

c++cassemblygccmicro-optimization

Score: 16

Answers: 8

Hassan Syed

Reputation: 20496

Preserving the Execution pipeline with branch layout in C source? Which prediction do CPUs or compilers start with?

ccpu-architecturecompiler-optimizationmicro-optimizationbranch-prediction

Score: 1

Answers: 2

muser

Reputation: 185

Why is this reordering of sub and mul instructions helpful?

cassemblygcccpu-architecturemicro-optimization

Score: 3

Answers: 2

Thilo

Reputation: 262794

Cost of exception handlers in Python

pythonperformanceexceptionmicro-optimization

Score: 152

Answers: 5

Noah

Reputation: 1759

Why does a NOP (as a 5th uop) speed up a 4 uop loop on Ice Lake?

assemblyx86-64cpu-architecturemicro-optimization

Score: 13

Answers: 0

user541686

Reputation: 210735

Is it possible to make MSVC's __assume(0) aka std::unreachable() actually optimize?

c++visual-c++micro-optimizationassumption

Score: 3

Answers: 1

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StackOverflow Questions for Tag: micro-optimization

Performance penalty: denormalized numbers versus branch mis-predictions

How to auto-vectorize (SIMD) a modular multiplication in Rust

Is it still worth using the Quake fast inverse square root algorithm nowadays on x86-64?

DateTime.DayOfWeek micro optimization

Generate FMOV without inline assembly

popcount in arm assembly without neon

Branch on ?: operator?

Which execution ports can SIMD shuffles use for AVX2 and NEON?

Micro Optimization of a 4-bucket histogram of a large array or list

Bit packing of groups of n repeated bits in a 32-bit word, compact to 1 bit per group

INC instruction vs ADD 1: Does it matter?

boost::thread data structure sizes on the ridiculous side?

Why is clang&#39;s `-O3` alloca 2x faster than g++ on a simplistic alloca benchmark

Why can&#39;t GCC generate an optimal operator== for a struct of two int32s?

Verifying compiler optimizations in gcc/g++ by analyzing assembly listings

Preserving the Execution pipeline with branch layout in C source? Which prediction do CPUs or compilers start with?

Why is this reordering of sub and mul instructions helpful?

Cost of exception handlers in Python

Why does a NOP (as a 5th uop) speed up a 4 uop loop on Ice Lake?

Is it possible to make MSVC&#39;s __assume(0) aka std::unreachable() actually optimize?

Why is clang's `-O3` alloca 2x faster than g++ on a simplistic alloca benchmark

Why can't GCC generate an optimal operator== for a struct of two int32s?

Is it possible to make MSVC's __assume(0) aka std::unreachable() actually optimize?