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Branch prediction
Branch prediction is the set of hardware and compiler techniques a processor uses to guess whether a branch will be taken and where it goes, enabling speculative execution.
Branch predictor
A branch predictor, or branch prediction unit, is processor hardware that guesses branch outcomes before they resolve, allowing speculative execution and avoiding costly pipeline stalls.
Branch target buffer
A branch target buffer is a small cache-like processor structure that stores recent branch targets so the next fetch address can be predicted before branches resolve.
Return address stack
The return address stack (RAS), also called a return stack buffer, is a small hardware stack in a processor that predicts the targets of function return instructions.
Spectre (security vulnerability)
Spectre is a hardware security vulnerability, disclosed in 2018, that abuses speculative execution to leak data through cache side channels on Intel, AMD, and ARM processors.
TAGE branch predictor
The TAGE branch predictor (TAgged GEometric history lengths) is a conditional branch predictor for processors, introduced in 2006 by André Seznec and Pierre Michaud at IRISA/INRIA in Rennes, France.