StackOverflow Questions for Tag: micro-optimization

Gilles-Philippe Paillé

Reputation: 3274

Advantage of using LEA over MOV for passing parameters in Assembly compiled from C++

c++assemblyvisual-c++x86-64micro-optimization

Score: 4

Answers: 2

digito_evo

Reputation: 3682

How to write a custom exception class derived from std::invalid_argument?

c++exceptionc-stringsstdstringmicro-optimization

Score: 5

Answers: 2

QuarticCat

Reputation: 1526

Is there a faster algorithm for max(ctz(x), ctz(y))?

c++algorithmrustbit-manipulationmicro-optimization

Score: 33

Answers: 4

Ammar Faizi

Reputation: 1459

AVX2 code cannot be faster than gcc base optmization

c++performancex86-64micro-optimizationavx2

Score: 2

Answers: 3

Coder

Reputation: 227

Does branchless programming make sense on very old x86 CPUs? (before 80486)

assemblyx86cpu-architecturemicro-optimizationbranch-prediction

Score: 1

Answers: 0

Hysteria103

Reputation: 77

How do I optimize a block copy and right shift + saturate to max=5, for Cortex-M3

armcortex-mmicro-optimizationthumb

Score: 2

Answers: 1

Hysteria103

Reputation: 77

How do I reduce execution time and number of cycles for a factorial loop? And/or code-size?

armcortex-mmicro-optimizationexecution-timethumb

Score: 2

Answers: 4

fgrieu

Reputation: 2912

Fastest polling loop - how can I trim 1 CPU cycle?

assemblycortex-mmicro-optimization

Score: 8

Answers: 2

Homer512

Reputation: 13438

Missing optimization: mov al, [mem] to bitfield-insert a new low byte into an integer

cassemblyx86-64micro-optimization

Score: 8

Answers: 1

chrysante

Reputation: 2846

Why do none of the major compilers optimize this conditional store that checks if the value is already set?

c++compiler-optimizationmicro-optimization

Score: 57

Answers: 4

HelloGUI

Reputation: 161

uiCA assembly code check dosen't detect JCC erratum

assemblyx86-64micro-optimization

Score: 1

Answers: 1

HeapUnderStop

Reputation: 398

Speed up strlen using SWAR in x86-64 assembly

assemblyx86-64micro-optimizationstrlenswar

Score: 1

Answers: 1

TLW

Reputation: 1439

Filling an AVX512 register with incrementing bytes

assemblyoptimizationx86-64micro-optimizationavx512

Score: 5

Answers: 1

User342

Reputation: 17

Detect null byte in a (16 bit) word in Assembly

assemblyx86bit-manipulationmicro-optimizationbitmask

Score: 0

Answers: 1

Schilive

Reputation: 284

Is increasing stack and moving faster than pushing, in x86 assembly?

assemblyx86stackstack-memorymicro-optimization

Score: 1

Answers: 0

HelloGUI

Reputation: 161

Assembly handwritten function slower than GCC compiled function

assemblyx86-64cpu-architecturememory-alignmentmicro-optimization

Score: 1

Answers: 2

user21777985

Reputation:

Popcount assembly / sum indexes of set bits

assemblybit-manipulationx86-64micro-optimizationhammingweight

Score: 5

Answers: 3

HelloGUI

Reputation: 161

Assembly function's data arrangment in data section

assemblyx86-64cpu-architecturemicro-optimization

Score: 2

Answers: 1

Sayan

Reputation: 99

Is 32 bit comparison faster than 64 bit comparison?

cperformancecomparisonmicro-optimization

Score: 5

Answers: 1

Noah

Reputation: 1759

Why does the act of introducing a destructor result in worse codegen? (Passed by reference instead of by value in a register)

c++compiler-optimizationcalling-conventionmicro-optimizationabi

Score: 5

Answers: 1

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StackOverflow Questions for Tag: micro-optimization

Advantage of using LEA over MOV for passing parameters in Assembly compiled from C++

How to write a custom exception class derived from std::invalid_argument?

Is there a faster algorithm for max(ctz(x), ctz(y))?

AVX2 code cannot be faster than gcc base optmization

Does branchless programming make sense on very old x86 CPUs? (before 80486)

How do I optimize a block copy and right shift + saturate to max=5, for Cortex-M3

How do I reduce execution time and number of cycles for a factorial loop? And/or code-size?

Fastest polling loop - how can I trim 1 CPU cycle?

Missing optimization: mov al, [mem] to bitfield-insert a new low byte into an integer

Why do none of the major compilers optimize this conditional store that checks if the value is already set?

uiCA assembly code check dosen&#39;t detect JCC erratum

Speed up strlen using SWAR in x86-64 assembly

Filling an AVX512 register with incrementing bytes

Detect null byte in a (16 bit) word in Assembly

Is increasing stack and moving faster than pushing, in x86 assembly?

Assembly handwritten function slower than GCC compiled function

Popcount assembly / sum indexes of set bits

Assembly function&#39;s data arrangment in data section

Is 32 bit comparison faster than 64 bit comparison?

Why does the act of introducing a destructor result in worse codegen? (Passed by reference instead of by value in a register)

uiCA assembly code check dosen't detect JCC erratum

Assembly function's data arrangment in data section