diff --git a/.deepsource.toml b/.deepsource.toml
deleted file mode 100644
index 7901d2d2..00000000
--- a/.deepsource.toml
+++ /dev/null
@@ -1,12 +0,0 @@
-version = 1
-
-test_patterns = ["**/*_test.go"]
-
-exclude_patterns = ["scripts/**"]
-
-[[analyzers]]
-name = "go"
-enabled = true
-
-  [analyzers.meta]
-  import_paths = ["github.com/beego/beego"]
diff --git a/client/cache/memory.go b/client/cache/memory.go
index e4b704c9..f294595d 100644
--- a/client/cache/memory.go
+++ b/client/cache/memory.go
@@ -42,7 +42,7 @@ func (mi *MemoryItem) isExpire() bool {
 	if mi.lifespan == 0 {
 		return false
 	}
-	return time.Now().Sub(mi.createdTime) > mi.lifespan
+	return time.Since(mi.createdTime) > mi.lifespan
 }
 
 // MemoryCache is a memory cache adapter.
@@ -66,7 +66,7 @@ func (bc *MemoryCache) Get(ctx context.Context, key string) (interface{}, error)
 	bc.RLock()
 	defer bc.RUnlock()
 	if itm, ok :=
-	 	bc.items[key]; ok {
+		bc.items[key]; ok {
 		if itm.isExpire() {
 			return nil, ErrKeyExpired
 		}
diff --git a/client/orm/filter/prometheus/filter.go b/client/orm/filter/prometheus/filter.go
index 270deaf6..b2c83dcf 100644
--- a/client/orm/filter/prometheus/filter.go
+++ b/client/orm/filter/prometheus/filter.go
@@ -85,7 +85,7 @@ func (builder *FilterChainBuilder) report(ctx context.Context, inv *orm.Invocati
 }
 
 func (builder *FilterChainBuilder) reportTxn(ctx context.Context, inv *orm.Invocation) {
-	dur := time.Now().Sub(inv.TxStartTime) / time.Millisecond
+	dur := time.Since(inv.TxStartTime) / time.Millisecond
 	summaryVec.WithLabelValues(inv.Method, inv.TxName,
 		strconv.FormatBool(inv.InsideTx), inv.TxName).Observe(float64(dur))
 }
diff --git a/client/orm/orm_log.go b/client/orm/orm_log.go
index 8ac373b5..6a89f557 100644
--- a/client/orm/orm_log.go
+++ b/client/orm/orm_log.go
@@ -41,7 +41,7 @@ func NewLog(out io.Writer) *Log {
 
 func debugLogQueies(alias *alias, operaton, query string, t time.Time, err error, args ...interface{}) {
 	var logMap = make(map[string]interface{})
-	sub := time.Now().Sub(t) / 1e5
+	sub := time.Since(t) / 1e5
 	elsp := float64(int(sub)) / 10.0
 	logMap["cost_time"] = elsp
 	flag := "  OK"
diff --git a/core/admin/profile.go b/core/admin/profile.go
index 5b3fdb21..6162a2d4 100644
--- a/core/admin/profile.go
+++ b/core/admin/profile.go
@@ -108,7 +108,7 @@ func printGC(memStats *runtime.MemStats, gcstats *debug.GCStats, w io.Writer) {
 
 	if gcstats.NumGC > 0 {
 		lastPause := gcstats.Pause[0]
-		elapsed := time.Now().Sub(startTime)
+		elapsed := time.Since(startTime)
 		overhead := float64(gcstats.PauseTotal) / float64(elapsed) * 100
 		allocatedRate := float64(memStats.TotalAlloc) / elapsed.Seconds()
 
@@ -125,7 +125,7 @@ func printGC(memStats *runtime.MemStats, gcstats *debug.GCStats, w io.Writer) {
 			utils.ToShortTimeFormat(gcstats.PauseQuantiles[99]))
 	} else {
 		// while GC has disabled
-		elapsed := time.Now().Sub(startTime)
+		elapsed := time.Since(startTime)
 		allocatedRate := float64(memStats.TotalAlloc) / elapsed.Seconds()
 
 		fmt.Fprintf(w, "Alloc:%s Sys:%s Alloc(Rate):%s/s\n",