48 lignes
884 o
Go
48 lignes
884 o
Go
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package perf
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import (
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"fmt"
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"io"
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"net/http"
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"sort"
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"sync"
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"text/tabwriter"
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)
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var (
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mu sync.RWMutex
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events = map[string]*event{}
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)
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func init() {
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http.HandleFunc("/debug/perf", func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "text/plain; charset=UTF-8")
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WriteEventsTable(w)
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})
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}
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func WriteEventsTable(w io.Writer) {
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tw := tabwriter.NewWriter(w, 0, 0, 2, ' ', 0)
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fmt.Fprint(tw, "description\tcount\tmin\tmean\tmax\n")
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type t struct {
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d string
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e *event
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}
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mu.RLock()
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es := make([]t, 0, len(events))
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for d, e := range events {
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e.mu.RLock()
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es = append(es, t{d, e})
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defer e.mu.RUnlock()
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}
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mu.RUnlock()
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sort.Slice(es, func(i, j int) bool {
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return es[i].e.mean() < es[j].e.mean()
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})
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for _, el := range es {
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e := el.e
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fmt.Fprintf(tw, "%s\t%d\t%s\t%s\t%s\n", el.d, e.count, e.min, e.mean(), e.max)
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}
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tw.Flush()
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}
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