<story><title>V8 release v6.9</title><url>https://v8project.blogspot.com/2018/08/v8-release-69.html</url></story><parent_chain></parent_chain><comment><author>bovermyer</author><text>This is the bit I&amp;#x27;m most interested in:&lt;p&gt;&amp;gt; WebAssembly got a new baseline compiler for much faster startup of complex websites with big WebAssembly modules (such as Google Earth and AutoCAD). Depending on the hardware we are seeing speedups of more than 10×. Stay tuned for more details in a separate blog post.</text></comment>
<story><title>V8 release v6.9</title><url>https://v8project.blogspot.com/2018/08/v8-release-69.html</url></story><parent_chain></parent_chain><comment><author>shawn</author><text>&lt;i&gt;Built-in functions currently consume 700 KB in each Isolate (an Isolate roughly corresponds to a browser tab in Chrome). This is quite wasteful, and last year we began working on reducing this overhead. In V8 v6.4, we shipped lazy deserialization, ensuring that each Isolate only pays for the built-ins that it actually needs (but each Isolate still had its own copy).&lt;/i&gt;&lt;p&gt;Also known as Autoload. What’s old is new again... &lt;a href=&quot;http:&amp;#x2F;&amp;#x2F;www.gnu.org&amp;#x2F;software&amp;#x2F;emacs&amp;#x2F;manual&amp;#x2F;html_node&amp;#x2F;elisp&amp;#x2F;Autoload.html&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;www.gnu.org&amp;#x2F;software&amp;#x2F;emacs&amp;#x2F;manual&amp;#x2F;html_node&amp;#x2F;elisp&amp;#x2F;Aut...&lt;/a&gt;&lt;p&gt;&lt;i&gt;Embedded built-ins go one step further. An embedded built-in is shared by all Isolates, and embedded into the binary itself instead of copied onto the JavaScript heap. This means that built-ins exist in memory only once regardless of how many Isolates are running, an especially useful property now that Site Isolation has been enabled by default.&lt;/i&gt;&lt;p&gt;Inb4 security vuln in a builtin is used to pivot across tabs or reveal state in other tabs. Like, say, a timing attack on regex exec to reveal whether the word “Facebook” appears in some other tab. &amp;lt;&amp;#x2F;baseless&amp;gt;</text></comment>