__intel_fast_memcpy

__intel_fast_memcpy

When profiling my application I see references to the function __intel_fast_memcpy. Is this function users accessible? Does it provide superior performance to just calling the compiler memcpy() function?

Beau

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For more complete information about compiler optimizations, see our Optimization Notice.

This function is not accessable from user. It's provided by the Intel compiler for better performance. When the compiler sees "memcpy()", it translates to this function.

Jennifer

So you should be able to use nm or dumpbin to verify that memcpy() has in fact been replaced by the intel optimized function.
It is intended to recognize cases which benefit from code for specific Intel CPUs. Needless to say, you might be interested in profiling to compare performance with alternate libraries on your application.

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