Number Parsing at a Gigabyte per Second

• fast_float

  15 1,277 8.7 C++

  Fast and exact implementation of the C++ from_chars functions for number types: 4x to 10x faster than strtod, part of GCC 12 and WebKit/Safari

  

He touched on JSON parsers in a previous post about fast_double_parser: "People who write fast parsers tend to roll their own number parsers (e.g., RapidJSON, sajson), and so we did. However, we sacrifice some standard compliance." (The "we" in this context refers to simdjson.)

https://lemire.me/blog/2020/03/10/fast-float-parsing-in-prac...

He followed up in a comment: "RapidJSON has at least two fast-parsing mode. The fast mode, which I think is what you refer to, is indeed quite fast, but it can be off by one ULP, so it is not standard compliant."

The Github README for this new project says, "The fast_float library provides a performance similar to that of the fast_double_parser library."

https://github.com/fastfloat/fast_float

However, the benchmarks show a significant improvement relative to those in the fast_double_parser README:

https://github.com/lemire/fast_double_parser

I tried to run the benchmarks, but my CMake is apparently too old, and Homebrew barfed all over the living room rug when I tried to update it.

• InfluxDB

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