fast parse DeletionTimestamp from pod

bench_test.go

package bench

import (
	"testing"
)

func BenchmarkParseDeletionTimestamp(b *testing.B) {
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		_, _ = ParseDeletionTimestamp(data)
	}
}

bencho.go

package bench

import (
	"fmt"

	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

	"github.com/VictoriaMetrics/easyproto"
)

func ParseDeletionTimestamp(data []byte) (ts int64, err error) {
	var fc easyproto.FieldContext
	var ok bool
	for len(data) > 0 {
		data, err = fc.NextField(data)
		if err != nil {
			return 0, fmt.Errorf("cannot read next field in Pod message")
		}
		switch fc.FieldNum {
		case 1:
			data, ok = fc.MessageData()
			if !ok {
				return 0, fmt.Errorf("cannot read Pod ObjectMeta name")
			}
			for len(data) > 0 {
				data, err = fc.NextField(data)
				if err != nil {
					return 0, fmt.Errorf("cannot read next field in Pod ObjectMeta message")
				}
				switch fc.FieldNum {
				case 9:
					data, ok := fc.MessageData()
					if !ok {
						return 0, fmt.Errorf("cannot read Pod DeletionTimestamp name")
					}
					for len(data) > 0 {
						data, err = fc.NextField(data)
						if !ok {
							return 0, fmt.Errorf("cannot read Pod DeletionTimestamp name")
						}
						switch fc.FieldNum {
						case 1:
							ts, ok = fc.Int64()
							if !ok {
								return 0, fmt.Errorf("cannot read Pod DeletionTimestamp name")
							}
							return
						}
					}
				}
			}
		}
	}

	return
}

var pod, data = func() (*corev1.Pod, []byte) {
	now := metav1.Now()
	pod := &corev1.Pod{}
	pod.Name = "test"
	pod.DeletionTimestamp = &now
	// pod.DeletionTimestamp = nil

	data, _ := pod.Marshal()

	return pod, data
}()

func main() {
	deletionTimestamp, err := ParseDeletionTimestamp(data)
	fmt.Printf("pod deletionTimestamp=%#v err=%v\n", deletionTimestamp, err)
}

output.txt

goos: windows
goarch: amd64
pkg: bench
cpu: 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
BenchmarkParseDeletionTimestamp
BenchmarkParseDeletionTimestamp-8       20026668                51.21 ns/op            0 B/op          0 allocs/op
PASS
ok      bench   2.085s