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RE2
RE2 is a fast, safe, thread-friendly alternative to backtracking regular expression engines like those used in PCRE, Perl, and Python. It is a C++ library.
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InfluxDB
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.
I do not think it depends on your Perl version. Looks like Micro is written in go and uses their implementation which is “Perl compatible”. That’s why the error mentions perls. A little googling for go RegEx sends me to this site. https://github.com/google/re2/wiki/Syntax
NOTE:
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Hence, a higher number means a more popular project.