mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-09 23:24:05 -08:00
ce153e3fff
The generic version is more efficient. Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
97 lines
2.4 KiB
Go
97 lines
2.4 KiB
Go
// Copyright 2013 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package stats
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"time"
|
|
|
|
"golang.org/x/exp/slices"
|
|
)
|
|
|
|
// A Timer that can be started and stopped and accumulates the total time it
|
|
// was running (the time between Start() and Stop()).
|
|
type Timer struct {
|
|
name fmt.Stringer
|
|
created int
|
|
start time.Time
|
|
duration time.Duration
|
|
}
|
|
|
|
// Start the timer.
|
|
func (t *Timer) Start() *Timer {
|
|
t.start = time.Now()
|
|
return t
|
|
}
|
|
|
|
// Stop the timer.
|
|
func (t *Timer) Stop() {
|
|
t.duration += time.Since(t.start)
|
|
}
|
|
|
|
// ElapsedTime returns the time that passed since starting the timer.
|
|
func (t *Timer) ElapsedTime() time.Duration {
|
|
return time.Since(t.start)
|
|
}
|
|
|
|
// Duration returns the duration value of the timer in seconds.
|
|
func (t *Timer) Duration() float64 {
|
|
return t.duration.Seconds()
|
|
}
|
|
|
|
// Return a string representation of the Timer.
|
|
func (t *Timer) String() string {
|
|
return fmt.Sprintf("%s: %s", t.name, t.duration)
|
|
}
|
|
|
|
// A TimerGroup represents a group of timers relevant to a single query.
|
|
type TimerGroup struct {
|
|
timers map[fmt.Stringer]*Timer
|
|
}
|
|
|
|
// NewTimerGroup constructs a new TimerGroup.
|
|
func NewTimerGroup() *TimerGroup {
|
|
return &TimerGroup{timers: map[fmt.Stringer]*Timer{}}
|
|
}
|
|
|
|
// GetTimer gets (and creates, if necessary) the Timer for a given code section.
|
|
func (t *TimerGroup) GetTimer(name fmt.Stringer) *Timer {
|
|
if timer, exists := t.timers[name]; exists {
|
|
return timer
|
|
}
|
|
timer := &Timer{
|
|
name: name,
|
|
created: len(t.timers),
|
|
}
|
|
t.timers[name] = timer
|
|
return timer
|
|
}
|
|
|
|
// Return a string representation of a TimerGroup.
|
|
func (t *TimerGroup) String() string {
|
|
timers := make([]*Timer, 0, len(t.timers))
|
|
for _, timer := range t.timers {
|
|
timers = append(timers, timer)
|
|
}
|
|
slices.SortFunc(timers, func(a, b *Timer) bool {
|
|
return a.created < b.created
|
|
})
|
|
result := &bytes.Buffer{}
|
|
for _, timer := range timers {
|
|
fmt.Fprintf(result, "%s\n", timer)
|
|
}
|
|
return result.String()
|
|
}
|