Super fast super property access · V8
Show navigation The super keyword can be used for accessing properties and functions on an object’s parent. Previously, accessing a super property (like super.x) was implemented via a runtime call. Starting from V8 v9.0, we reuse the inline cache (IC) system in non-optimized code and generate the proper optimized code for super property access, without having to jump to the runtime. As you can see
Faster JavaScript calls · V8
Show navigation JavaScript allows calling a function with a different number of arguments than the expected number of parameters, i.e., one can pass fewer or more arguments than the declared formal parameters. The former case is called under-application and the latter is called over-application. In the under-application case, the remaining parameters get assigned the undefined value. In the over-a
A lighter V8 · V8
In late 2018 we started a project called V8 Lite, aimed at dramatically reducing V8’s memory usage. Initially this project was envisioned as a separate Lite mode of V8 specifically aimed at low-memory mobile devices or embedder use-cases that care more about reduced memory usage than throughput execution speed. However, in the process of this work, we realized that many of the memory optimizations
V8 release v7.7 · V8
Every six weeks, we create a new branch of V8 as part of our release process. Each version is branched from V8’s Git master immediately before a Chrome Beta milestone. Today we’re pleased to announce our newest branch, V8 version 7.7, which is in beta until its release in coordination with Chrome 77 Stable in several weeks. V8 v7.7 is filled with all sorts of developer-facing goodies. This post pr
Emscripten and the LLVM WebAssembly backend · V8
Show navigation WebAssembly is normally compiled from a source language, which means that developers need tools to use it. Because of that, the V8 team works on relevant open-source projects like LLVM, Emscripten, Binaryen, and WABT. This post describes some of the work we’ve been doing on Emscripten and LLVM, which will soon allow Emscripten to switch to the LLVM WebAssembly backend by default —
V8 release v7.6 · V8
Every six weeks, we create a new branch of V8 as part of our release process. Each version is branched from V8’s Git master immediately before a Chrome Beta milestone. Today we’re pleased to announce our newest branch, V8 version 7.6, which is in beta until its release in coordination with Chrome 76 Stable in several weeks. V8 v7.6 is filled with all sorts of developer-facing goodies. This post pr
Concurrent marking in V8 · V8
Show navigation This post describes the garbage collection technique called concurrent marking. The optimization allows a JavaScript application to continue execution while the garbage collector scans the heap to find and mark live objects. Our benchmarks show that concurrent marking reduces the time spent marking on the main thread by 60%–70%. Concurrent marking is the last puzzle piece of the Or
V8 release v6.1 · V8
Every six weeks, we create a new branch of V8 as part of our release process. Each version is branched from V8’s Git master immediately before a Chrome Beta milestone. Today we’re pleased to announce our newest branch, V8 version 6.1, which is in beta until its release in coordination with Chrome 61 Stable in several weeks. V8 v6.1 is filled with all sorts of developer-facing goodies. We’d like to
WebAssembly browser preview · V8
Show navigation Today we’re happy to announce, in tandem with Firefox and Edge, a WebAssembly browser preview. WebAssembly or Wasm is a new runtime and compilation target for the web, designed by collaborators from Google, Mozilla, Microsoft, Apple, and the W3C WebAssembly Community Group. What does this milestone mark? #This milestone is significant because it marks: a release candidate for our M
V8 release v5.2 · V8
Roughly every six weeks, we create a new branch of V8 as part of our release process. Each version is branched from V8’s Git master immediately before Chrome branches for a Chrome Beta milestone. Today we’re pleased to announce our newest branch, V8 version 5.2, which will be in beta until it is released in coordination with Chrome 52 Stable. V8 5.2 is filled with all sorts of developer-facing goo
Experimental support for WebAssembly in V8 · V8
Show navigation For a comprehensive overview of WebAssembly and a roadmap for future community collaboration, see A WebAssembly Milestone on the Mozilla Hacks blog. Since June 2015, collaborators from Google, Mozilla, Microsoft, Apple and the W3C WebAssembly Community Group have been hard at work designing, specifying, and implementing (1, 2, 3, 4) WebAssembly, a new runtime and compilation target
V8 release v5.0 · V8
The first step in the V8 release process is a new branch from the Git master immediately before Chromium branches for a Chrome Beta milestone (roughly every six weeks). Our newest release branch is V8 v5.0, which will remain in beta until we release a stable build in conjunction with Chrome 50 Stable. Here’s a highlight of the new developer-facing features in this version of V8. Note: The version
Embedder's Guide - Google V8 JavaScript Engine - Google Code
Show navigationWhat is V8?V8 is Google’s open source high-performance JavaScript and WebAssembly engine, written in C++. It is used in Chrome and in Node.js, among others. It implements ECMAScript and WebAssembly, and runs on Windows, macOS, and Linux systems that use x64, IA-32, or ARM processors. V8 can be embedded into any C++ application. Latest posts and feature explainersWebAssembly JSPI has
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