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Show navigation Class fields have been shipped in V8 since v7.2 and private class methods have been shipped since v8.4. After the proposals reached stage 4 in 2021, work had begun to improve the support of the new class features in V8 - until then, there had been two main issues affecting their adoption: The initialization of class fields and private methods was much slower than the assignment of
Show navigation 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 await using declarations, which automatically calls dispose method when a resource goes out of scope; [Symbol.dispose]() and [Symbol
nodebestpractices/sections/errorhandling/returningpromises.md at master · goldbergyoni/nodebestpractices
When an error occurs, whether from a synchronous or asynchronous flow, it's imperative to have a full stacktrace of the error flow. Surprisingly, if an async function returns a promise (e.g. calls other async function) without awaiting, should an error occur then the caller function won't appear in the stacktrace. This will leave the person who diagnoses the error with partial information - All th
Every four weeks, we create a new branch of V8 as part of our release process. Each version is branched from V8’s Git main immediately before a Chrome Beta milestone. Today we’re pleased to announce our newest branch, V8 version 9.7, which is in beta until its release in coordination with Chrome 97 Stable in several weeks. V8 v9.7 is filled with all sorts of developer-facing goodies. This post pro
これはなに Rails で開発されているプロダクトで libv8 が使われており違いや浅く歴史について調べたので簡単にまとめました TL;DR therubyracer と libv8 と libv8-node すべて JavaScript Engine V8 を実行バイナリである 最初は therubyracer が開発されていたが、 実行環境の差分追従などが困難になり libv8 の開発を開始、その後再び困難になったことから libv8-node の開発が行われている therubyracer, libv8, libv8-node の何れかの利用が求められたら、現在は libv8-node を使うことが望ましい therubyracer について therubyracer は JavaScript Engine V8 実行を行う binary を提供している Gem です 2018 年
Show navigation The new class static initialization block syntax lets developers gather code that should run once for a given class definition and put them in a single place. Consider the following example where a pseudo-random number generator uses a static block to initialize an entropy pool once, when the class MyPRNG definition is evaluated. class MyPRNG { constructor(seed) { if (seed === unde
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) will get the methods. In the following subsections, we explain iterator helpers. All the provided examples are working in a blog archive page that
This blog post has been authored by José Dapena Paz (Igalia), with contributions from Jason Williams (Bloomberg), Ashley Claymore (Bloomberg), Rob Palmer (Bloomberg), Joyee Cheung (Igalia), and Shu-yu Guo (Google). In this post about V8 heap snapshots, I will talk about some performance problems found by Bloomberg engineers, and how we fixed them to make JavaScript memory analysis faster than ever
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 8.5, which is in beta until its release in coordination with Chrome 85 Stable in several weeks. V8 v8.5 is filled with all sorts of developer-facing goodies. This post pr
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 9.0, which is in beta until its release in coordination with Chrome 90 Stable in several weeks. V8 v9.0 is filled with all sorts of developer-facing goodies. This post pr
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Faster initialization of instances with new class features · V8
JavaScript's New Superpower: Explicit Resource Management · V8
V8 release v9.7 · V8
therubyracer と libv8 と libv8-node - Qiita
Class static initialization blocks · V8
Iterator helpers · V8
Speeding up V8 heap snapshots · V8
V8 release v8.5 · V8
V8 release v9.0 · V8