62 lines
1.9 KiB
Markdown
62 lines
1.9 KiB
Markdown
# ratecounter
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[](https://circleci.com/gh/paulbellamy/ratecounter)
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[](https://goreportcard.com/report/github.com/paulbellamy/ratecounter)
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[](https://godoc.org/github.com/paulbellamy/ratecounter)
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[](https://codecov.io/gh/paulbellamy/ratecounter)
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A Thread-Safe RateCounter implementation in Golang
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## Usage
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```
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import "github.com/paulbellamy/ratecounter"
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```
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Package ratecounter provides a thread-safe rate-counter, for tracking
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counts in an interval
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Useful for implementing counters and stats of 'requests-per-second' (for
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example):
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```go
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// We're recording marks-per-1second
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counter := ratecounter.NewRateCounter(1 * time.Second)
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// Record an event happening
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counter.Incr(1)
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// get the current requests-per-second
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counter.Rate()
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```
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To record an average over a longer period, you can:
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```go
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// Record requests-per-minute
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counter := ratecounter.NewRateCounter(60 * time.Second)
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// Calculate the average requests-per-second for the last minute
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counter.Rate() / 60
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```
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Also you can track average value of some metric in an interval.
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Useful for implementing counters and stats of 'average-execution-time' (for
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example):
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```go
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// We're recording average execution time of some heavy operation in the last minute.
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counter := ratecounter.NewAvgRateCounter(60 * time.Second)
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// Start timer.
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startTime := time.Now()
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// Execute heavy operation.
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heavyOperation()
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// Record elapsed time.
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counter.Incr(time.Since(startTime).Nanoseconds())
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// Get the current average execution time.
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counter.Rate()
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```
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## Documentation
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Check latest documentation on [go doc](https://godoc.org/github.com/paulbellamy/ratecounter).
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