Benchmark memchar (with GCC builtins)

[Iakh via Digitalmars-d]

On Friday, 30 October 2015 at 21:33:25 UTC, Andrei Alexandrescu 
wrote:
> Could you please take a look at GCC's generated code and 
> implementation of memchr? -- Andrei

Copy-and-paste from glibc's memchr(runGLibC) gaves the result 
below.
-----
Naive:         21.4 	TickDuration(132485705)
SIMD:          3.17 	TickDuration(19629892)
SIMDM:         2.49 	TickDuration(15420462)
C:                1 	TickDuration(6195504)
runGLibC:      4.32 	TickDuration(26782585)
SIMDU:          1.8 	TickDuration(11128618)

ASM shows memchr is realy called. There is neither compiler magic 
nor
local memchr imlementation.
Aligned versions of memchr use aligned load from memory and 
unaligned
one uses unaligned load. So at this point optimisation done well.