Have you tried [sam](https://github.com/OpenSystemsLab/sam.nim)?
- Nim JSON parsing is 30 times slower than Node.JS b3liever
- Nim JSON parsing is 30 times slower than Node.JS shirleyquirk
- Nim JSON parsing is 30 times slower than Node.JS timothee
- Nim JSON parsing is 30 times slower than Node.JS Ward
- Nim JSON parsing is 30 times slower than Node.JS codic12
- Nim JSON parsing is 30 times slower than Node.JS treeform
- Nim JSON parsing is 30 times slower than Node.JS b3liever
- Nim JSON parsing is 30 times slower than Node.JS juancarlospaco
- Nim JSON parsing is 30 times slower than Node.JS alexeypetrushin
- Nim JSON parsing is 30 times slower than Node.JS b3liever
- Nim JSON parsing is 30 times slower than Node.JS b3liever
- Nim JSON parsing is 30 times slower than Node.JS federico3
- Nim JSON parsing is 30 times slower than Node.JS timothee
- Nim JSON parsing is 30 times slower than Node.JS alexeypetrushin
- Nim JSON parsing is 30 times slower than Node.JS timothee
