I don’t know which container to use (and at this point I’m too afraid to ask)

• nanobench

  13 1,301 5.0 C++

  Simple, fast, accurate single-header microbenchmarking functionality for C++11/14/17/20

Right. Regex runtime construction is known to be slow, so ideally the state machinery construction is built at compile time (boost.xpressive, ctre). Also, boost.regex is faster than most of the std implementations if compile time isn’t possible. And if that’s no good rewrite without regex. Since it sounds like it’s all encapsulated at least it would be easy to measure the options. These days I use this one to compare https://nanobench.ankerl.com/

• Folly

  90 27,034 9.8 C++

  An open-source C++ library developed and used at Facebook.

  

I can't see any benchmarks there.

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

Suggest a related project