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What is causing the store latency in this program?

Published on
#c #x86-64 #cpu-architecture #micro-optimization #micro-architecture
292
Views

Fast BCD addition

Published on
#c #algorithm #bit-manipulation #micro-optimization #bcd
154
Views

Why is `if x is None: pass` faster than `x is None` alone?

Published on
#python #performance #cpython #micro-optimization #python-internals
191
Views

Optimized 53->32 bit modulo computation on 32-bit processors

Published on
#c #algorithm #micro-optimization #integer-division
112
Views

x86 assembly abs() implementation? (revisited)

Published on
#assembly #gcc #x86-64 #micro-optimization #absolute-value
77
Views

How to group static/global variables together for improved cache locality in C++

Published on
#c++ #caching #micro-optimization #memory-layout
189
Views

Why doesn't the C++ standard library utilize likely/unlikely attributes?

Published on
#c++ #algorithm #compiler-optimization #micro-optimization #likely-unlikely
133
Views

LEA vs MOV imm64 for loading address-constant into register

Published on
#assembly #x86-64 #micro-optimization
129
Views

How to zero certain bytes of a register?

Published on
#assembly #gcc #x86 #x86-64 #micro-optimization
139
Views

Can packing variables or parameters into structures/unions introduce unforseen performance penalties?

Published on
#c #gcc #struct #micro-optimization #swar
145
Views

Controlling class member layout AND destructor order

Published on
#c++ #class #constructor #destructor #micro-optimization
29
Views

Is making a temporary variable or incrementing faster?

Published on
#c #variables #variable-assignment #increment #micro-optimization
240
Views

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

Published on
#c #bit-manipulation #micro-optimization #twos-complement #branchless
177
Views

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?

Published on
#c++ #if-statement #optimization #micro-optimization #branch-prediction
205
Views

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

Published on
#c #performance #integer #micro-optimization
216
Views

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

Published on
#c++ #visual-c++ #micro-optimization #assumption
196
Views

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

Published on
#c++ #assembly #visual-c++ #x86-64 #micro-optimization
108
Views

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

Published on
#assembly #x86 #cpu-architecture #micro-optimization #branch-prediction
208
Views

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

Published on
#c #assembly #x86-64 #micro-optimization
37
Views

uiCA assembly code check dosen't detect JCC erratum

Published on
#assembly #x86-64 #micro-optimization

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