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Re:JSON for Modern C++ by Kh4L on Sunday September 29, 2019 @05:34AM (#21106073)
We used to use. We first micro-benchmarked all those and we found that Tencent/rapidjson was more than 100% faster than nlohmann/json :)

Our primary use is to parse http://cocodataset.org/ metadata files and RapidJson is 100% faster.

Re:JSON for Modern C++ by doublerebel on Sunday September 29, 2019 @10:58AM (#21107379)
RapidJson is very efficient. I have used several JSON libraries for C++, and right now I'm really enjoying json_dto, which is built on RapidJson. It has great developer UX, including the most succint syntax I've used, and support for std::optional.

https://github.com/Stiffstream/json_dto

Re:JSON for Modern C++ by e12e on Sunday September 29, 2019 @06:55AM (#21106321)
> 100% faster.

So, twice as fast - it parses the dataset in half the time?