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fastjson
Fast JSON parser and validator for Go. No custom structs, no code generation, no reflection (by valyala)
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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.
Maybe this package is an alternative? It does not seem to use the standard lib implementation of ParseFloat. https://github.com/valyala/fastjson/
NOTE:
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Hence, a higher number means a more popular project.