From 2ca8a4e58ed37b1140d8d71b48eea1b2a396b71e Mon Sep 17 00:00:00 2001
From: Piotr <17101802+thampiotr@users.noreply.github.com>
Date: Mon, 13 Jan 2025 16:58:06 +0000
Subject: [PATCH] Intern strings in discovery components to reduce memory
 consumption.

---
 internal/component/discovery/discovery.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/internal/component/discovery/discovery.go b/internal/component/discovery/discovery.go
index 03670814e1..5a081cc536 100644
--- a/internal/component/discovery/discovery.go
+++ b/internal/component/discovery/discovery.go
@@ -9,6 +9,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/josharian/intern"
 	"github.com/prometheus/common/model"
 	"github.com/prometheus/prometheus/discovery"
 	"github.com/prometheus/prometheus/discovery/targetgroup"
@@ -274,10 +275,10 @@ func toAlloyTargets(cache map[string]*targetgroup.Group) []Target {
 			// first add the group labels, and then the
 			// target labels, so that target labels take precedence.
 			for k, v := range group.Labels {
-				tLabels[string(k)] = string(v)
+				tLabels[intern.String(string(k))] = intern.String(string(v))
 			}
 			for k, v := range target {
-				tLabels[string(k)] = string(v)
+				tLabels[intern.String(string(k))] = intern.String(string(v))
 			}
 			allTargets = append(allTargets, tLabels)
 		}