strstr challenge

create the fastest C strstr function implementation.
Rules:
1.Must be portable between different architectures(ARM,x86/x86-64,MIPS)
2.Must handle strings of any length that C standard library strstr can handle.
3.Cannot rely on undefined behavior or platform specific code.
strstr reference: http://www.cplusplus.com/reference/cstring/strstr/

>>17
That's the compiler's job. It's not >>16's fault that most of today's compilers are shit. If you want fast non-portable code get out an instruction timing table and write it in assembly.