&gt; Yes, you can write high-performance Haskell but it requires expertise or huge amount of profiling and time.<p>Is there a language X that allows you to write high performance X without huge amounts of profiling and time?<p>&gt; On the other hand, you can easily write faster (speed-wise) prototypes in C++ and get superior performance almost all the time.<p>You can&#x27;t really compare development time though can you, even with C++x11? Even if so, you should probably specify the version of C++ you are referring to since they can mean very different experiences.<p>&gt; List of ways to write performant Haskell: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10209798" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10209798</a><p>Cool!