V8

JSON.stringify is a core JavaScript function for serializing data. Its performance directly affects common operations across the web, from serializing data for a network request to saving data to localStorage . A faster JSON.stringify translates to quicke

In this blog post, we explain two optimizations for WebAssembly that we recently implemented in V8 and that shipped with Google Chrome M137, namely speculative call_indirect inlining and deoptimization support for WebAssembly. In combination, they allow u

The Explicit Resource Management proposal introduces a deterministic approach to explicitly manage the lifecycle of resources like file handles, network connections, and more. This proposal brings the following additions to the language: the using and awa

Getting JavaScript running fast is key for a responsive web app. Even with V8's advanced optimizations, parsing and compiling critical JavaScript during startup can still create performance bottlenecks. Knowing which JavaScript functions to compile during

V8's end-tier optimizing compiler, Turbofan, is famously one of the few large-scale production compilers to use Sea of Nodes (SoN). However, since almost 3 years ago, we've started to get rid of Sea of Nodes and fall back to a more traditional Control-Flo

At V8, we're constantly striving to improve JavaScript performance. As part of this effort, we recently revisited the JetStream2 benchmark suite to eliminate performance cliffs. This post details a specific optimization we made that yielded a significant

The JavaScript Promise Integration (JSPI) API allows WebAssembly applications that were written assuming synchronous access to external functionality to operate smoothly in an environment where the functionality is actually asynchronous . This note outlin

WebAssembly's JavaScript Promise Integration (JSPI) API has a new API, available in Chrome release M126. We talk about what has changed, how to use it with Emscripten, and what is the roadmap for JSPI. JSPI is an API that allows WebAssembly applications t

After almost three years since the initial design document and hundreds of CLs in the meantime, the V8 Sandbox - a lightweight, in-process sandbox for V8 - has now progressed to the point where it is no longer considered an experimental security feature.

Iterator helpers are a collection of new methods on Iterator prototype that help in general use of iterators. Since these helper methods are on the iterator prototype, any object that has Iterator.prototype on its prototype chain (e.g. array iterators) wi