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{{title|Accelerator}}
 
{{title|Accelerator}}
An '''accelerator''' or an '''offload engine''' is a piece of specialized hardware circuitry that implements various functions in order to perform a set of operations with higher performance or greater energy efficiency than a [[general-purpose microprocessor]]. The use of accelerators by software to speed up various operations is called [[hardware acceleration]]. Accelerators are used to significantly improve the performance of certain workloads. They are often a separate component attached to a system, but may also be integrated directly into the processor, sometimes in the form of an [[ISA]] extension.
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An '''accelerator''' or an '''offload engine''' is a piece of specialized hardware circuitry that implements various functions in order to perform a set of operations with higher performance or greater energy efficiency than a [[general-purpose microprocessor]]. The use of accelerators by software to speed up various operations is called [[hardware acceleration]]. Accelerators are used to significantly improve the performance of certain workloads. They are often a separate component attached to a system, but may also be integrated directly into the processor.
  
 
A unique subset of accelerators are also called [[coprocessors]]. The distinction lies in how an accelerator interacts with the [[host processor]]. Whereas a co-processor is typically connected to the internals of the host processor, which then passes it instructions to execute, a generic accelerator is typically viewed as an independent I/O device which is programmed though an interface.
 
A unique subset of accelerators are also called [[coprocessors]]. The distinction lies in how an accelerator interacts with the [[host processor]]. Whereas a co-processor is typically connected to the internals of the host processor, which then passes it instructions to execute, a generic accelerator is typically viewed as an independent I/O device which is programmed though an interface.

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