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Why is processing a sorted array faster than processing an unsorted array?

javac++performancecpu-architecturebranch-prediction
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Why is the loop instruction slow? Couldn't Intel have implemented it efficiently?

performancecpu-architectureassemblyx86intel
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Micro fusion and addressing modes

cpu-architectureassemblyx86inteliaca
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Why doesn't GCC use partial registers?

cpu-architecturegccassemblyx86-64x86
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Can x86's MOV really be "free"? Why can't I reproduce this at all?

c#cpu-architectureassemblyx86micro-optimization
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shufflecmdrestrictionattrrecursive-queryoptimistic-lockingatomicclass-table-inheritancesaltweb-performancerankcoalesceooadfirefox-addonunionloopslocal-variablessubscriptiontkintercsr