StackOverflow Questions for Tag: micro-optimization

einpoklum

Reputation: 132108

Are scaled-index addressing modes a good idea?

gccassemblyclangx86-64micro-optimization

Score: 6

Answers: 2

Bobby

Reputation: 85

Controlling class member layout AND destructor order

c++classconstructordestructormicro-optimization

Score: 1

Answers: 2

Andrei Oniga

Reputation: 8559

JavaScript: Is the `if / else` statement faster than the conditional statement in?

javascriptperformanceif-statementconditional-statementsmicro-optimization

Score: 0

Answers: 3

G. Fougeron

Reputation: 481

Do most compilers optimize MATMUL(TRANSPOSE(A),B)?

fortrangfortranintel-fortranmicro-optimization

Score: 12

Answers: 1

flying_raijin

Reputation: 49

How can I find out the time required to perform of a particular instruction for Xtensa microprocessor for e.g. wsr / rsr?

performanceassemblymicro-optimizationesp32xtensa

Score: 1

Answers: 2

gerarddp

Reputation: 667

Is x >= 0 more efficient than x > -1?

c++optimizationmicro-optimization

Score: 6

Answers: 6

user20746246

Reputation:

Fastest way to find 16bit match in a 4 element short array?

cx86-64micro-optimizationswar

Score: 1

Answers: 3

Curious

Reputation: 557

Why XOR before SETcc?

c++assemblyx86micro-optimization

Score: 7

Answers: 1

Daniel

Reputation: 3011

In assembly, should branchless code use complementary CMOVs?

assemblyx86micro-optimizationbranchlessconditional-move

Score: 6

Answers: 1

Alex

Reputation: 10136

Fast sign of integer in C

cmicro-optimizationsigned-integer

Score: 18

Answers: 5

user3568189

Reputation: 29

why moving immediate value to register then adding it to second register is faster then add immediate value?

x86inline-assemblymicro-optimizationamd-processor

Score: 2

Answers: 0

bokan

Reputation: 3692

How many CPU cycles does it take to convert a String to an Integer?

assemblyx86cpu-architecturemicro-optimizationcpu-speed

Score: 0

Answers: 3

CPlus

Reputation: 4848

How can I perform a branchless conditional arithmetic operation in C?

cbit-manipulationmicro-optimizationtwos-complementbranchless

Score: 1

Answers: 3

BeeOnRope

Reputation: 65046

Does the llvm-bolt instrumentation mode result in less accurate BOLT profiles?

optimizationllvmcompiler-optimizationmicro-optimizationbolt-optimizer

Score: 4

Answers: 1

penguin2213

Reputation: 41

In c++ what is the importance in terms of performance of using 'else' in situations where it doesn't change the flow of the program?

c++if-statementoptimizationmicro-optimizationbranch-prediction

Score: 2

Answers: 1

user22200698

Reputation: 211

What are the pros and cons of int, unsigned int, uint_fastN_t, and int_fastN_t?

cperformanceintegermicro-optimization

Score: 1

Answers: 3

Dinesh Maurya

Reputation: 852

Guidelines for using [[likely]] / [[unlikely]] attributes in c++20

c++attributesc++20micro-optimizationlikely-unlikely

Score: 5

Answers: 0

Algo

Reputation: 23

Why was the [[unlikely]] attribute used in this example?

c++cpuc++20c++-chronomicro-optimization

Score: 0

Answers: 1

balajimc55

Reputation: 2295

What is the best way to set a register to zero in x86 assembly: xor, mov or and?

performanceassemblyoptimizationx86micro-optimization

Score: 191

Answers: 1

Jere

Reputation: 1266

What is faster in C++: mod (%) or another counter?

c++performanceassemblymicro-optimizationbranch-prediction

Score: 2

Answers: 3

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StackOverflow Questions for Tag: micro-optimization

Are scaled-index addressing modes a good idea?

Controlling class member layout AND destructor order

JavaScript: Is the `if / else` statement faster than the conditional statement in?

Do most compilers optimize MATMUL(TRANSPOSE(A),B)?

How can I find out the time required to perform of a particular instruction for Xtensa microprocessor for e.g. wsr / rsr?

Is x &gt;= 0 more efficient than x &gt; -1?

Fastest way to find 16bit match in a 4 element short array?

Why XOR before SETcc?

In assembly, should branchless code use complementary CMOVs?

Fast sign of integer in C

why moving immediate value to register then adding it to second register is faster then add immediate value?

How many CPU cycles does it take to convert a String to an Integer?

How can I perform a branchless conditional arithmetic operation in C?

Does the llvm-bolt instrumentation mode result in less accurate BOLT profiles?

In c++ what is the importance in terms of performance of using &#39;else&#39; in situations where it doesn&#39;t change the flow of the program?

What are the pros and cons of int, unsigned int, uint_fastN_t, and int_fastN_t?

Guidelines for using [[likely]] / [[unlikely]] attributes in c++20

Why was the [[unlikely]] attribute used in this example?

What is the best way to set a register to zero in x86 assembly: xor, mov or and?

What is faster in C++: mod (%) or another counter?

Is x >= 0 more efficient than x > -1?

In c++ what is the importance in terms of performance of using 'else' in situations where it doesn't change the flow of the program?