[patch] refactor

Signed-off-by: kpango <kpango@vdaas.org>

example/main.go

@@ -18,7 +18,7 @@ func main() {
 
 	fmt.Printf("s1=%v\ns2=%v\ns3=%v\ns4=%v\n", s1, s2, s3, s4)
 
-	fmt.Printf("nanonow %v\nnow unixnano %v\nnow add unixnano%v\nnanonow + dur %v\nstring %v",
+	fmt.Printf("nanonow %v\nnow unixnano %v\nnow add unixnano%v\nnanonow + dur %v\nstring %v\n",
 		fastime.UnixNanoNow(),
 		fastime.Now().Unix(),
 		fastime.Now().Add(time.Second),

example/result.txt

@@ -0,0 +1,16 @@
+s1=2022-02-08 22:37:21.754272 +0900 JST
+s2=2022-02-08 22:37:21.754272 +0900 JST
+s3=2022-02-08 22:37:21.754272 +0900 JST
+s4=2022-02-08 22:37:23.755217 +0900 JST
+nanonow 1644327448754453000
+now unixnano 1644327448
+now add unixnano2022-02-08 22:37:29.754453 +0900 JST
+nanonow + dur 1644327449754453000
+string 2022-02-08T22:37:28+09:00
+Address of buf=fuckkkking:	0xc0001c8498
+Address of buf=:	0xc0001c8498
+Address of a1=[102 117 99 107 107 107 107 105 110 103]:	0xc000010350
+Address of b1=fuckkkking:	0xc0001c84c8
+Address of buf=helloooooo:	0xc0001c8498
+Address of a2=[102 117 99 107 107 107 107 105 110 103]:	0xc000010380
+Address of b2=fuckkkking:	0xc0001c84e0

fastime.go

@@ -110,7 +110,8 @@ func (f *fastime) store(t time.Time) *fastime {
 	if buf == nil || len(form) > buf.Cap() {
 		buf.Grow(len(form))
 	}
-	f.ft.Store(t.AppendFormat(buf.Bytes()[:0], form))
+	f.ft.Store(t.AppendFormat(buf.Bytes(), form))
+	buf.Reset()
 	f.pool.Put(buf)
 	return f
 }