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Top 10 C++ Runtime Projects
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JetBrains
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Uprobes are a type of probe that can be used to trace functions in user-space applications, such as Nginx. They work by attaching to specific user-space function entry and exit points, allowing you to capture precise timing information. However, it’s important to note that using uprobes in the kernel mode eBPF runtime may cause some performance overhead. To mitigate this, you can consider using a user-mode eBPF runtime like bpftime, which is based on LLVM JIT/AOT. This runtime can run eBPF programs in user space, offering compatibility with kernel mode eBPF while potentially reducing overhead.
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It’s still early in its development, but the Luau team is building a first-party standalone runtime called [Lute](https://github.com/luau-lang/lute) that’s in C++ because the language’s implementation is also in C++. That might be more your speed?
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Sevalla
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Project mention: Wasm2Mpy: Compiling WASM to MicroPython so it can run in Raspberry | news.ycombinator.com | 2024-09-20
What would be the recommendation to run on ESP32?
https://github.com/wasm3/wasm3? https://github.com/espressif/esp-wasmachine ? https://github.com/bytecodealliance/wasm-micro-runtime/tree/... ? https://github.com/TOPLLab/WARDuino ?
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skybison
A fork of Instagram's experimental performance oriented greenfield implementation of Python. It features small objects; a moving GC; hidden classes; bytecode inline caching; type-specialized bytecode; an experimental template JIT. (by tekknolagi)
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C++ Runtime discussion
C++ Runtime related posts
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The StarlingMonkey JavaScript Runtime
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Building High-Performance Userspace eBPF VMs with LLVM
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Pallene: A statically compiled companion language for Lua
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Bpftime: Userspace eBPF runtime for fast Uprobe and Syscall hook and Plugins
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How to create a mesh programmatically?
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Rendering mathematical objects in UE
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Procedural Mesh causing performance issues
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A note from our sponsor - InfluxDB
www.influxdata.com | 1 Sep 2025
Index
What are some of the best open-source Runtime projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | uWebSockets.js | 8,701 |
| 2 | iree | 3,322 |
| 3 | RealtimeMeshComponent | 1,666 |
| 4 | bpftime | 1,080 |
| 5 | RaftLib | 976 |
| 6 | ONE | 505 |
| 7 | lute | 126 |
| 8 | WARDuino | 94 |
| 9 | skybison | 46 |
| 10 | libletlib | 11 |
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