&quot;I like how getting 46% gain over already optimized C code is considered &quot;insignificant&quot;.<p>Author here (again!) I used SIMD in different algorithms and often speedup was greater than 2, 3, or more. So, from my skewed point of view speedup less than 2 isn&#x27;t very impressive. :) But I buy your opinion, next time I&#x27;ll try to be more enthusiastic.