Use strconv instead of fmt in values' String funcs

The existing implementation of flag values with fmt package uses
more memory and works slower than the implementation with strconv
package.

1 files changed, 2 insertions, 5 deletions

diff --git a/float64.go b/float64.go
index 50fbf8c..04b5492 100644
--- a/float64.go
+++ b/float64.go
@@ -1,9 +1,6 @@
 package pflag
 
-import (
-	"fmt"
-	"strconv"
-)
+import "strconv"
 
 // -- float64 Value
 type float64Value float64
@@ -23,7 +20,7 @@ func (f *float64Value) Type() string {
 	return "float64"
 }
 
-func (f *float64Value) String() string { return fmt.Sprintf("%v", *f) }
+func (f *float64Value) String() string { return strconv.FormatFloat(float64(*f), 'g', -1, 64) }
 
 func float64Conv(sval string) (interface{}, error) {
 	return strconv.ParseFloat(sval, 64)