unnamed 是一个在线 IDE：左侧是资源管理器与评测样例，右侧是 Monaco 编辑器。它内置「本地 WASM
沙箱」，可以直接在浏览器里编译、运行并判定 C++ 与 Python 代码，代码不出本机，断网也能用。
用本地 WASM 沙箱时不会：编译与运行都在你自己的浏览器里完成。切到 Piston 或 Judge0
这类远端引擎时，代码会发送到你填写的评测服务地址。
第一次用本地沙箱要先下载运行时：C++ 工具链（clang + libc++）约 50MB，Python 运行时约 24MB，
只下一次，之后常驻浏览器缓存；下载过之后即可离线使用。清除了浏览器数据就要重新下载。
本地 WASM 沙箱支持 C++ 与 Python 3（Python 由 CPython 解释器直接执行，不需要编译）；
其它语言请切到 Piston 或 Judge0 远端评测服务。
首次运行要先下载运行时，之后每一份新代码的第一个用例都要付一次编译开销，同一份代码连续跑多个用例只编译一次。
卡片上的耗时只计「程序运行」那一段，不含编译与排队。
没有统一的缩放系数。同一台机器上实测，纯计算约慢 1.8 倍，排序 200 万个数约慢 6.7 倍——
倍率跟着访存密度走，不能外推。
unnamed — an online C++ / Python compile-and-judge environment in your browser
unnamed is an online IDE: the Explorer and the test cases on the left, the Monaco editor on the right.
It ships a local WASM sandbox that compiles, runs and judges C++ and Python code right in your browser —
your code never leaves the machine, and it keeps working offline.
What it does
- Compile and run C++ in the browser, or run Python 3 directly — both happen locally and your code is never uploaded
- Run and judge several test cases in one go, with time limit (TLE) detection and per-case timing
- Grab a problem from an online judge with the browser extension; the statement and samples land in your workspace, no copy-pasting
- A Monaco editor, with multi-language drafts and editor preferences stored locally in your browser
- A new file starts from a template by language (C++ / Python / notes); templates are editable, can be switched off, and travel with cloud sync
- Notes are plain Markdown — LaTeX formulas, tables and images, with a live split preview and a full-screen mode
- Switch between the local WASM sandbox and remote Piston / Judge0 judge services
- Installable as a standalone window app that compiles and runs offline once installed
- Native builds for macOS / Windows / Android are in development (compiling and running locally on your machine); the desktop builds can also open a folder on your computer as the workspace, reading and writing real files on disk — download details will appear in the guide once they ship
Common questions
Does my code get uploaded to a server?
Not with the local WASM sandbox: compiling and running both happen in your own browser. Switch to a remote
engine such as Piston or Judge0 and your code is sent to the judge service URL you entered.
Do I need to be online?
The first local run has to download the runtime: the C++ toolchain (clang + libc++) is about 50MB and the
Python runtime about 24MB. Each is downloaded once and then stays in the browser cache, so offline use works
from then on. Clearing your browser data means downloading again.
Which languages are supported?
The local WASM sandbox supports C++ and Python 3 (Python runs straight in the CPython interpreter and is not
compiled). For other languages, switch to a remote Piston or Judge0 judge service.
Why is the first run so much slower?
The first run has to download the runtime; after that, the first case of every new piece of code pays the
compilation cost once, and running several cases against the same code compiles it only once. The timing on a
card covers the program run only, excluding compilation and queueing.
How much slower is the browser than native?
There is no single scaling factor. Measured on the same machine, pure computation is about 1.8× slower and
sorting 2 million numbers about 6.7× slower — the ratio follows memory density and cannot be extrapolated.
Read the unnamed User Guide for the full
explanation, and the Privacy Policy for how
your data is handled.
The notes above are for environments without scripting. The full editor and test panel need JavaScript
enabled in your browser.