avoid atomic level overhead for amd64

logger.go

@@ -448,10 +448,6 @@ var timeOffset, timeZone = func() (int64, string) {
 	return int64(n), s
 }()
 
-func (l *Logger) silent(level Level) bool {
-	return uint32(level) < atomic.LoadUint32((*uint32)(&l.Level))
-}
-
 func (l *Logger) header(level Level) *Entry {
 	e := epool.Get().(*Entry)
 	e.buf = e.buf[:0]

logger_arch_amd64.go

@@ -0,0 +1,8 @@
+//go:build amd64
+// +build amd64
+
+package log
+
+func (l *Logger) silent(level Level) bool {
+	return level < l.Level
+}

logger_arch_others.go

@@ -0,0 +1,12 @@
+//go:build !amd64
+// +build !amd64
+
+package log
+
+import (
+	"sync/atomic"
+)
+
+func (l *Logger) silent(level Level) bool {
+	return uint32(level) < atomic.LoadUint32((*uint32)(&l.Level))
+}