sonic-cpp的SIMD加速不一定比架构设计、算法优化和微观调优的性能高，可以和LJSON性能对比

Assessment

Research direction

Description

sonic-cpp解析和序列化干不赢yyjson，大概率也干不赢 LJSON 的复用模式(模式3)

• LJSON使用复用模式生成可编辑DOM，速度可比yyjson快约100%，内存占用只有yyjson的约50%
• LJSON的文件流模式支持真流式解析和序列化（边读文件边解析，边序列化边写文件）
• LJSON使用C99，没有使用手动SIMD等依赖具体CPU架构的优化，Linux-GCC/CLANG 和 Windows-MSVC编译都能支持（最初还运行在平头哥的CSKY-ECOS上）

以下是 Intel i7-1260P& OS: Ubuntu 20.04 (VMWare) 测试结果（第一个测试1000x表示放大1000倍（测试1次）， 第2个测试的参数1000表示重复测试1000次），LJSON复用模式解析达到了2.5GB/s的解析速度。

LJSON使用自研数值和字符串转换引擎

• 浮点 ↔ 字符串转换性能远超标准库算法和小超主流算法（sprintf、grisu2、dragonbox）
• float64精度设定为16位十进制数字，边界处理追求最短表示而非机械的偶数舍入

Getting set up

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1. Read the whole issue, then the project's contributing guide.
2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
3. Fork the repository and make your change on a branch.
4. Open a pull request that references the issue number.

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