diff --git a/pkg/promlib/converter/prom.go b/pkg/promlib/converter/prom.go
index cb7975f978e..504ae33f3ca 100644
--- a/pkg/promlib/converter/prom.go
+++ b/pkg/promlib/converter/prom.go
@@ -6,6 +6,7 @@ import (
 	"slices"
 	"strconv"
 	"time"
+	"unsafe"
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
 	"github.com/grafana/grafana-plugin-sdk-go/data"
@@ -858,14 +859,17 @@ func readHistogram(iter *sdkjsoniter.Iterator, hist *histogramInfo) error {
 }
 
 func appendValueFromString(iter *sdkjsoniter.Iterator, field *data.Field) error {
-	var err error
-	var s string
-	if s, err = iter.ReadString(); err != nil {
+	// Read the string directly into our buffer
+	buf, err := iter.ReadStringAsSlice()
+	if err != nil {
 		return err
 	}
 
-	var v float64
-	if v, err = strconv.ParseFloat(s, 64); err != nil {
+	// #nosec G103
+	// Convert string to float64 without allocation
+	// https://github.com/search?q=org%3Agrafana+yoloString&type=code
+	v, err := strconv.ParseFloat(*(*string)(unsafe.Pointer(&buf)), 64)
+	if err != nil {
 		return err
 	}