&gt; if Ruby can actually be a relatively fast language...<p>I think that &quot;if&quot; still is a pretty big if. If Truffle&#x2F;Graal ships and is able to run Rails at a 30x perf improvement, that would be huge. Right now there&#x27;s still some work left there, and the original article notes that they haven&#x27;t been able to replicate the claimed perf gains. What&#x27;s also tricky is that while there can often be &quot;performance sweet spots&quot; [1] in dynamic languages, it&#x27;s very easy to accidentally fall out of them and make most of your app slow even if theoretically it&#x27;s possible for it to run faster.<p>The TechEmpower benchmarks [2] are pretty damning when it comes to Ruby&#x27;s <i>current</i> performance relative to other languages. For some projects, eventually it&#x27;s easier to switch to a different language that&#x27;s already fast rather than investing into speeding up a slow one.<p>[1] <a href="http:&#x2F;&#x2F;mrale.ph&#x2F;blog&#x2F;2011&#x2F;11&#x2F;05&#x2F;the-trap-of-the-performance-sweet-spot.html" rel="nofollow">http:&#x2F;&#x2F;mrale.ph&#x2F;blog&#x2F;2011&#x2F;11&#x2F;05&#x2F;the-trap-of-the-performance-...</a>
[2] <a href="https:&#x2F;&#x2F;www.techempower.com&#x2F;benchmarks&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.techempower.com&#x2F;benchmarks&#x2F;</a>