https://github.com/hawkw/tinymetrics

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hawkw / tinymetrics Public

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a minimal, allocation-free Prometheus/OpenMetrics metrics
implementation for `no-std` and embedded Rust.

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@hawkw
hawkw feat(timestamp): add optional timestamp support
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a5dce67 Mar 4, 2023
feat(timestamp): add optional timestamp support
a5dce67

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tinymetrics why should you use it?

README.md

 tinymetrics

a minimal, allocation-free Prometheus/OpenMetrics metrics
implementation for no-std and embedded projects.

 why should you use it?

you may want to use this crate if:

 1. you want the Prometheus/OpenMetrics text exposition format. other
    metrics systems are not supported. if you want a generic way to
    record metrics that can be emitted in a number of different
    formats, the i highly recommend the metrics crate and its
    ecosystem, which provide a generic facade implementation that can
    be used with multiple metrics systems. however, these libraries
    may be less suitable for use in embedded systems -- read on for
    why.
 2. you can't (or don't want to) allocate memory dynamically. this
    crate is intended to allow all metrics storage to be declared in
    statics, for use in embedded systems and other no-std use-cases.
    in order to support completely static usage, this crate has some
    additional limitations over other Prometheus/OpenMetrics
    implementations. in particular:
 3. the cardinality of metrics labels is known ahead of time. because
    tinymetrics stores metrics in static, fixed-size arrays, the
    maximum size of the label set of each metric must be declared at
    compile time. this is an inherent limitation to using static
    storage, but it may be acceptable if you only want to expose a
    small number of metrics with known labels.
 4. you only need counter and gauge metrics. i haven't implemented
    the summary and histogram metric types yet, although it would be
    nice to eventually.

About

a minimal, allocation-free Prometheus/OpenMetrics metrics
implementation for `no-std` and embedded Rust.

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Readme

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38 stars

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  * Rust 98.5%
  * Nix 1.5%

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