diff --git a/hrp/boomer.go b/hrp/boomer.go
index c47db199..8d5e0266 100644
--- a/hrp/boomer.go
+++ b/hrp/boomer.go
@@ -99,6 +99,9 @@ func (b *HRPBoomer) convertBoomerTask(testcase *TestCase, rendezvousList []*Rend
 	parametersIterator := caseRunner.parametersIterator
 	parametersIterator.SetUnlimitedMode()
 
+	// reset start time only once
+	once := sync.Once{}
+
 	return &boomer.Task{
 		Name:   testcase.Config.Name,
 		Weight: testcase.Config.Weight,
@@ -115,6 +118,10 @@ func (b *HRPBoomer) convertBoomerTask(testcase *TestCase, rendezvousList []*Rend
 
 			startTime := time.Now()
 			for _, step := range testcase.TestSteps {
+				// reset start time only once before step
+				once.Do(func() {
+					b.Boomer.ResetStartTime()
+				})
 				stepResult, err := step.Run(sessionRunner)
 				if err != nil {
 					// step failed
diff --git a/hrp/internal/boomer/boomer.go b/hrp/internal/boomer/boomer.go
index 83459a4f..6c67007d 100644
--- a/hrp/internal/boomer/boomer.go
+++ b/hrp/internal/boomer/boomer.go
@@ -170,3 +170,7 @@ func (b *Boomer) GetSpawnDoneChan() chan struct{} {
 func (b *Boomer) GetSpawnCount() int {
 	return b.localRunner.spawnCount
 }
+
+func (b *Boomer) ResetStartTime() {
+	b.localRunner.stats.total.resetStartTime()
+}
diff --git a/hrp/internal/boomer/output.go b/hrp/internal/boomer/output.go
index 79284cf7..eb34540a 100644
--- a/hrp/internal/boomer/output.go
+++ b/hrp/internal/boomer/output.go
@@ -10,6 +10,7 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/olekukonko/tablewriter"
+	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/push"
 	"github.com/rs/zerolog/log"
@@ -264,10 +265,9 @@ func deserializeStatsEntry(stat interface{}) (entryOutput *statsEntryOutput, err
 
 	var duration float64
 	if entry.Name == "Total" {
-		duration = float64(entry.LastRequestTimestamp - entry.StartTime)
-		// fix: avoid divide by zero
-		if duration < 1 {
-			duration = 1
+		duration = float64(entry.LastRequestTimestamp-entry.StartTime) / 1e3
+		if duration == 0 {
+			return nil, errors.New("no step specified")
 		}
 	} else {
 		duration = float64(reportStatsInterval / time.Second)
diff --git a/hrp/internal/boomer/runner.go b/hrp/internal/boomer/runner.go
index 25ad1bbf..68109901 100644
--- a/hrp/internal/boomer/runner.go
+++ b/hrp/internal/boomer/runner.go
@@ -11,7 +11,6 @@ import (
 	"time"
 
 	"github.com/olekukonko/tablewriter"
-
 	"github.com/rs/zerolog/log"
 )
 
@@ -154,7 +153,7 @@ func (r *runner) reportTestResult() {
 	if err != nil {
 		return
 	}
-	duration := time.Duration(entryTotalOutput.LastRequestTimestamp-entryTotalOutput.StartTime) * time.Second
+	duration := time.Duration(entryTotalOutput.LastRequestTimestamp-entryTotalOutput.StartTime) * time.Millisecond
 	currentTime := time.Now()
 	println(fmt.Sprint("=========================================== Statistics Summary =========================================="))
 	println(fmt.Sprintf("Current time: %s, Users: %v, Duration: %v, Accumulated Transactions: %d Passed, %d Failed",
diff --git a/hrp/internal/boomer/stats.go b/hrp/internal/boomer/stats.go
index b15c655d..8fdd3897 100644
--- a/hrp/internal/boomer/stats.go
+++ b/hrp/internal/boomer/stats.go
@@ -1,6 +1,7 @@
 package boomer
 
 import (
+	"sync/atomic"
 	"time"
 
 	"github.com/httprunner/httprunner/hrp/internal/json"
@@ -101,8 +102,6 @@ func (s *requestStats) get(name string, method string) (entry *statsEntry) {
 		newEntry := &statsEntry{
 			Name:          name,
 			Method:        method,
-			NumReqsPerSec: make(map[int64]int64),
-			NumFailPerSec: make(map[int64]int64),
 			ResponseTimes: make(map[int64]int64),
 		}
 		s.entries[name+method] = newEntry
@@ -171,10 +170,6 @@ type statsEntry struct {
 	MinResponseTime int64 `json:"min_response_time"`
 	// Maximum response time
 	MaxResponseTime int64 `json:"max_response_time"`
-	// A {second => request_count} dict that holds the number of requests made per second
-	NumReqsPerSec map[int64]int64 `json:"num_reqs_per_sec"`
-	// A (second => failure_count) dict that hold the number of failures per second
-	NumFailPerSec map[int64]int64 `json:"num_fail_per_sec"`
 	// A {response_time => count} dict that holds the response time distribution of all the requests
 	// The keys (the response time in ms) are rounded to store 1, 2, ... 9, 10, 20. .. 90,
 	// 100, 200 .. 900, 1000, 2000 ... 9000, in order to save memory.
@@ -191,17 +186,19 @@ type statsEntry struct {
 	NumNoneRequests int64 `json:"num_none_requests"`
 }
 
+func (s *statsEntry) resetStartTime() {
+	atomic.StoreInt64(&s.StartTime, time.Duration(time.Now().UnixNano()).Milliseconds())
+}
+
 func (s *statsEntry) reset() {
-	s.StartTime = time.Now().Unix()
+	atomic.StoreInt64(&s.StartTime, time.Duration(time.Now().UnixNano()).Milliseconds())
 	s.NumRequests = 0
 	s.NumFailures = 0
 	s.TotalResponseTime = 0
 	s.ResponseTimes = make(map[int64]int64)
 	s.MinResponseTime = 0
 	s.MaxResponseTime = 0
-	s.LastRequestTimestamp = time.Now().Unix()
-	s.NumReqsPerSec = make(map[int64]int64)
-	s.NumFailPerSec = make(map[int64]int64)
+	s.LastRequestTimestamp = time.Duration(time.Now().UnixNano()).Milliseconds()
 	s.TotalContentLength = 0
 }
 
@@ -215,15 +212,7 @@ func (s *statsEntry) log(responseTime int64, contentLength int64) {
 }
 
 func (s *statsEntry) logTimeOfRequest() {
-	key := time.Now().Unix()
-	_, ok := s.NumReqsPerSec[key]
-	if !ok {
-		s.NumReqsPerSec[key] = 1
-	} else {
-		s.NumReqsPerSec[key]++
-	}
-
-	s.LastRequestTimestamp = key
+	s.LastRequestTimestamp = time.Duration(time.Now().UnixNano()).Milliseconds()
 }
 
 func (s *statsEntry) logResponseTime(responseTime int64) {
@@ -267,13 +256,6 @@ func (s *statsEntry) logResponseTime(responseTime int64) {
 
 func (s *statsEntry) logFailures() {
 	s.NumFailures++
-	key := time.Now().Unix()
-	_, ok := s.NumFailPerSec[key]
-	if !ok {
-		s.NumFailPerSec[key] = 1
-	} else {
-		s.NumFailPerSec[key]++
-	}
 }
 
 func (s *statsEntry) serialize() map[string]interface{} {