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emscripten-core
emscripten
C++2011–2026
emscripten-core / emscripten

emscripten

Emscripten: An LLVM-to-WebAssembly Compiler

123Distinct people
148Mentions
0Explicit recommenders
27.8KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Emscripten: An LLVM-to-WebAssembly Compiler

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year148 dated mentions

Observed mentions: 2011-04-16 12:05:53 UTC to 2026-06-13 18:10:02 UTC.

051015202011-01-01 00:00:00 UTC to 2012-01-01 00:00:00 UTC (exclusive): 13 mentions; 3 submissions, 10 comments20112012-01-01 00:00:00 UTC to 2013-01-01 00:00:00 UTC (exclusive): 20 mentions; 4 submissions, 16 comments2013-01-01 00:00:00 UTC to 2014-01-01 00:00:00 UTC (exclusive): 21 mentions; 0 submissions, 21 comments2014-01-01 00:00:00 UTC to 2015-01-01 00:00:00 UTC (exclusive): 13 mentions; 1 submissions, 12 comments2015-01-01 00:00:00 UTC to 2016-01-01 00:00:00 UTC (exclusive): 16 mentions; 2 submissions, 14 comments2016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 10 mentions; 1 submissions, 9 comments2017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 17 mentions; 1 submissions, 16 comments2018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments20182019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments2020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 4 mentions; 1 submissions, 3 comments2021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 6 mentions; 1 submissions, 5 comments2022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments2023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments2024-01-01 00:00:00 UTC to 2025-01-01 00:00:00 UTC (exclusive): 5 mentions; 0 submissions, 5 comments2025-01-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 9 mentions; 0 submissions, 9 comments2026-01-01 00:00:00 UTC to 2027-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments. Incomplete calendar period.2026*

* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20112011-01-01 00:00:00 UTC2012-01-01 00:00:00 UTC13310
20122012-01-01 00:00:00 UTC2013-01-01 00:00:00 UTC20416
20132013-01-01 00:00:00 UTC2014-01-01 00:00:00 UTC21021
20142014-01-01 00:00:00 UTC2015-01-01 00:00:00 UTC13112
20152015-01-01 00:00:00 UTC2016-01-01 00:00:00 UTC16214
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC1019
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC17116
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC202
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC303
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC413
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC615
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC303
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC303
20242024-01-01 00:00:00 UTC2025-01-01 00:00:00 UTC505
20252025-01-01 00:00:00 UTC2026-01-01 00:00:00 UTC909
2026 (partial)2026-01-01 00:00:00 UTC2027-01-01 00:00:00 UTC303

What Hacker News says

10 sources
Clearly, it means you write database logic using C++ extended stored procedures [1], business logic in C++ middleware using something like CppCMS [2], and then write all your front end code in C++ and deploy it to the browser using Emscripten [3] Realistically, though, it's probably just a misinformed/careless/hopeless recruiter. Most likely misinformed, or inadequately informed. The recruiter's client probably has something specific in mind when if the asked for a 'full stack' C++ developer. Since you'll find C++ running in everything from embedded devices to phones to cars to airplanes to mainframes, there are so many 'stacks' that one could be referring to when talking about 'full stack'. Usually, full stack developer is used to describe someone who does both front and back end web development. While you could be a full stack dev who w
Read the rest
rites C++ on the back end of a web app and JS on the front end, it's not a very common combination. [1] http://www.codeproject.com/Articles/8571/Writing-Extended-St... [2] http://cppcms.com/wikipp/en/page/main [3] https://github.com/kripken/emscripten
In Ask HN: What does a C++ fullstack mean to you?
As sunfish mentions below, this spec document is being conservative in describing things that are still being discussed. There are experimental implementations in Firefox, Chrome and Edge. See https://webassembly.github.io/demo/. There's more information about the current binary format here: https://github.com/WebAssembly/design/blob/master/BinaryEnco... There's a prototype spec interpreter here: https://github.com/WebAssembly/spec/tree/master/ml-proto There's a build waterfall testing multiple tools here: https://wasm-stat.us/console, including the experimental LLVM toolchain, the emscripten-wasm toolchain[0], binaryen[1], and sexpr-wasm[2]. WebAssembly is still under development, but I don't think it's fair to call it an early prototype. [disclaimer: I'm a WebAssembly contributor] [0]: https://github.com/kripken/emscripten/wiki/WebAssem
Read the rest
In WebAssembly Specification Prototype
Hi, I'm one of the main authors of Browsix. One of our goals is to run C code - we have simple utilities from sbase running, and more complex code like latex and GNU make (the README needs updating). The main complication is that C code does system calls, which are traditionally blocking, and there isn't a good way to achieve that in current browsers with just ASM.js. So, we currently use the Emterpreter[1] (which is much slower) to make sure that anything on the stack underneath a system call can be saved and restored. SharedArrayBuffers should let us implement something faster in the near future. 1 - https://github.com/kripken/emscripten/wiki/Emterpreter
In Browsix – A Unix-Like Operating System for the Browser
It's in development, as many others software projects are, and is far from complete. The goal is to translate as much of core semantics as possible, but i doubt that all the core semantics will be translated. One for all is multi inheritance which is currently unsupported by current Javascript syntax. Even more, when you use an object such a list, it's really a JS Array that will be manipulated in the end, so you will have to use array.push() to add instead of python's list.append() But Translating something like Django is out of scope for all the transpilers, it would mean also converting sql drivers and so on? Does this really make any sense? Maybe you have a look at emscripten https://github.com/kripken/emscripten/wiki
In A Python-to-JavaScript Transpiler with BabelJS and SourceMaps
The Emscripten toolchain can be used to produce both WebAssembly and asm.js from the same codebase [0]. There are also the nascent beginnings of a translation tool from WebAssembly to asm.js here [1] (look for wasm2asm). Ultimately, it should be possible to write a streaming polyfill for WebAssembly, but no one has gotten around to making anything suitable for production yet. You're better off producing a separate fallback asm.js bundle for now. [0]: https://github.com/kripken/emscripten/wiki/WebAssembly [1]: https://github.com/webassembly/binaryen
In Experimental support for WebAssembly in V8
Emscripten can already compile to both asm.js and WebAssembly, with just flipping a switch between them. All the JS library support code is unchanged, so Emscripten's OpenGL to WebGL layer is used just like before, and the same for all the other libraries. The WebAssembly backend in LLVM will eventually be used by Emscripten as another way to emit WebAssembly (right now it translates asm.js to WebAssembly), but the new backend is not ready yet. See also https://github.com/kripken/emscripten/wiki/WebAssembly
In Brendan Eich: WebAssembly is a game-changer
Some notes: 1. Emscripten/asm.js supports the defined behavior case of setjmp/longjmp. What is not supported is jumping up an already unwound stack, which is undefined behavior. This is somewhat commonly-seen undefined behavior, though. 2. I don't think it's fair to say that function pointers are "hairy at best, broken at worst." Again, this is a case where we do not support undefined behavior. But perhaps most importantly, most real-world code is properly portable and just works. When not, we have tools that help figure things out. 3. It's not true that everything must be compiled into one massive JS file, Emscripten/asm.js also supports dynamic linking, [1]. However, the default is a single file, because then it can be more fully optimized. 4. There is already threads support, [2]. It works, and progress in the standards bodies is going
Read the rest
well. The main issue is waiting for browsers aside from Firefox nightly to support it, but that's coming too. A final note, I don't think the reason most asm.js use cases have been games is because the technology is only suitable for games. First, there are a bunch of non-game use cases already (for example, I've seen sites use asm.js for encryption, education, emulation, codecs, non-game WebGL sites, etc., including on major sites like Wikipedia [3]). But perhaps more importantly, games are already on the web, so they have a clear business model and use case. And, they are on the web mostly in the form of plugins, and plugins are going away, so they have to move to JavaScript. [1] https://github.com/kripken/emscripten/wiki/Linking [2] http://kripken.github.io/emscripten-site/docs/porting/pthrea... [3] https://brionv.com/log/2015/08/09/video-decoding-in-the-java...
In A look at asm.js and the future with WebAssembly

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