# V8 JavaScript engine 59 Hacker News commenters recommended V8 JavaScript engine and 36 criticized it, November 2025 to November 2026. It was recommended in 12 of 13 months. **Verdict:** Fast, widely deployed JavaScript engine from Google that people praise for performance and sandboxing. Caveats: large, complex C++ codebase with an unstable embedding API and recurring JIT-related security bugs. ## Why people recommend it - Very fast JavaScript execution (10 comments): "dynamic language implementations that are performance-competitive with static language implementations, like Javascript's V8/Bun/Deno" ([source](https://news.ycombinator.com/item?id=48392364)) "V8 does some crazy stuff that makes JS one of the fastest interpreted language there is." ([source](https://news.ycombinator.com/item?id=47352111)) "Chrome and v8 was just stupidly faster than any other browser and JS stack" ([source](https://news.ycombinator.com/item?id=48066346)) - Decades of engineering and tuning (6 comments): "v8 and JSC also have decades of performance tuning across basically every consumer device." ([source](https://news.ycombinator.com/item?id=49290568)) "The benefit is that JavaScript JIT compilers have a few decades of research behind them" ([source](https://news.ycombinator.com/item?id=47385939)) "With how much engineering was poured over V8, I don't doubt." ([source](https://news.ycombinator.com/item?id=46636009)) - Strong sandboxing for untrusted code (4 comments): "JS has the fastest, most robust and widely deployed sandboxing engines (V8, followed closely by JavaScriptCore" ([source](https://news.ycombinator.com/item?id=46127493)) "V8 is actually a nice case for CHERI since you can easily sandbox the JIT'd code" ([source](https://news.ycombinator.com/item?id=48927128)) "per-origin sandboxing, properly implementing web standards, V8, developer tools" ([source](https://news.ycombinator.com/item?id=47960858)) - Powers Chrome and the web (3 comments): "They basically revolutionized the web with the JavaScript V8 engine in chrome." ([source](https://news.ycombinator.com/item?id=47992548)) "They created V8, kickstarted the modern browser wars with Chrome." ([source](https://news.ycombinator.com/item?id=46547099)) "The chrome browser and the v8 engine are innovations." ([source](https://news.ycombinator.com/item?id=47072692)) ## What people warn about - JIT bugs enable sandbox escapes (5 comments): "There's been a constant stream of v8 VM sandbox escape discoveries since its dawn of course." ([source](https://news.ycombinator.com/item?id=46921608)) "The v8 JIT is very complex and can lead to sandbox escapes if there are type confusion bugs." ([source](https://news.ycombinator.com/item?id=49914063)) "finding a wrapper for it that doesn't come with a big warning NOT to use it as a sandbox" ([source](https://news.ycombinator.com/item?id=46490223)) - Large codebase, unstable embedding API (2 comments): "has an unstable API, and an absolutely massive unwieldy Google-style C++ code base" ([source](https://news.ycombinator.com/item?id=45939631)) "Trying to embed V8 and keep up with V8 API changes would be a huge amount of work" ([source](https://news.ycombinator.com/item?id=45939346)) - Still slow versus native code (3 comments): "Even basic arithmetic operations on a TypedArray over a SharedArrayBuffer is slow AF in v8 compared to a "native" JS Array" ([source](https://news.ycombinator.com/item?id=48613800)) "that just means less outrageously slow, not that it will be remotely competitive with native code" ([source](https://news.ycombinator.com/item?id=49887482)) "I rarely get performance within an order of magnitude of single-threaded C from V8" ([source](https://news.ycombinator.com/item?id=45792587)) ## Alternatives hackers recommend - [QuickJS](https://hackerapproved.com/p/quickjs.md): 33 recommend - [MicroQuickJS](https://hackerapproved.com/p/microquickjs.md): 19 recommend - [JavaScriptCore](https://hackerapproved.com/p/javascriptcore.md): 14 recommend - [Boa JavaScript engine](https://hackerapproved.com/p/boa-javascript-engine.md): 14 recommend - [SpiderMonkey](https://hackerapproved.com/p/spidermonkey.md): 8 recommend ## Cite as Hacker Approved, "V8 JavaScript engine", https://hackerapproved.com/p/v8/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).