[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/prometheus/common/expfmt/text_create.go b/vendor/github.com/prometheus/common/expfmt/text_create.go
index 8e473d0..5ba503b 100644
--- a/vendor/github.com/prometheus/common/expfmt/text_create.go
+++ b/vendor/github.com/prometheus/common/expfmt/text_create.go
@@ -14,9 +14,10 @@
package expfmt
import (
- "bytes"
+ "bufio"
"fmt"
"io"
+ "io/ioutil"
"math"
"strconv"
"strings"
@@ -27,7 +28,7 @@
dto "github.com/prometheus/client_model/go"
)
-// enhancedWriter has all the enhanced write functions needed here. bytes.Buffer
+// enhancedWriter has all the enhanced write functions needed here. bufio.Writer
// implements it.
type enhancedWriter interface {
io.Writer
@@ -37,14 +38,13 @@
}
const (
- initialBufSize = 512
initialNumBufSize = 24
)
var (
bufPool = sync.Pool{
New: func() interface{} {
- return bytes.NewBuffer(make([]byte, 0, initialBufSize))
+ return bufio.NewWriter(ioutil.Discard)
},
}
numBufPool = sync.Pool{
@@ -75,16 +75,14 @@
}
// Try the interface upgrade. If it doesn't work, we'll use a
- // bytes.Buffer from the sync.Pool and write out its content to out in a
- // single go in the end.
+ // bufio.Writer from the sync.Pool.
w, ok := out.(enhancedWriter)
if !ok {
- b := bufPool.Get().(*bytes.Buffer)
- b.Reset()
+ b := bufPool.Get().(*bufio.Writer)
+ b.Reset(out)
w = b
defer func() {
- bWritten, bErr := out.Write(b.Bytes())
- written = bWritten
+ bErr := b.Flush()
if err == nil {
err = bErr
}
@@ -425,9 +423,8 @@
func writeEscapedString(w enhancedWriter, v string, includeDoubleQuote bool) (int, error) {
if includeDoubleQuote {
return quotedEscaper.WriteString(w, v)
- } else {
- return escaper.WriteString(w, v)
}
+ return escaper.WriteString(w, v)
}
// writeFloat is equivalent to fmt.Fprint with a float64 argument but hardcodes