Select the runtime SIMD backend — simd_set

Select the backend used by subsequent calls to dispatched demo kernels such as count_nonzero() and convolve1d(). RsimdDispatch keeps all compiled variants in one shared object and switches a guarded resolved operation table. This makes same-process benchmarking possible.

Usage

simd_set_backend(backend = "auto")

Arguments

backend: Character scalar. Use "auto" to select the best available backend, or one of simd_info()$available_backends for an explicit choice.

Value

The selected backend summary string, invisibly. Possible values:

"<name>": All operations resolved to the same named backend.
"mixed": Different operations resolved to different backends (only possible under "auto").
"unavailable": No operation could be resolved for the requested backend.

Examples

old <- simd_backend()
simd_set_backend("scalar")
simd_set_backend("auto")