Looks like React 0.14.6 is about 38k gzipped:<p>curl --silent --output &#x2F;dev&#x2F;null -H &quot;Accept-Encoding: gzip,deflate&quot; --write-out &quot;size_download=%{size_download}\n&quot; <a href="https:&#x2F;&#x2F;cdnjs.cloudflare.com&#x2F;ajax&#x2F;libs&#x2F;react&#x2F;0.14.6&#x2F;react.min.js" rel="nofollow">https:&#x2F;&#x2F;cdnjs.cloudflare.com&#x2F;ajax&#x2F;libs&#x2F;react&#x2F;0.14.6&#x2F;react.mi...</a><p>&gt;&gt; size_download=39542