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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.
Very important is also to actually measuring the time, otherwise you won't get better at estimating. There are probably lots of options for timer-apps, so find something that works for you. Personally I use gtimelog.
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