diff --git a/go.mod b/go.mod
--- a/go.mod
+++ b/go.mod
@@ -63,6 +63,7 @@
 	github.com/prometheus/procfs v0.19.2
 	github.com/redis/go-redis/v9 v9.7.3
 	github.com/resend/resend-go/v3 v3.5.0
+	github.com/samber/lo v1.38.1
 	github.com/sethvargo/go-envconfig v1.1.0
 	github.com/sourcegraph/zoekt v0.0.0-20260605122240-893a523804f1
 	github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c
diff --git a/go.sum b/go.sum
--- a/go.sum
+++ b/go.sum
@@ -754,6 +754,8 @@
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/ryanuber/go-glob v1.0.0 h1:iQh3xXAumdQ+4Ufa5b25cRpC5TYKlno6hsv6Cb3pkBk=
 github.com/ryanuber/go-glob v1.0.0/go.mod h1:807d1WSdnB0XRJzKNil9Om6lcp/3a0v4qIHxIXzX/Yc=
+github.com/samber/lo v1.38.1 h1:j2XEAqXKb09Am4ebOg31SpvzUTTs6EN3VfgeLUhPdXM=
+github.com/samber/lo v1.38.1/go.mod h1:+m/ZKRl6ClXCE2Lgf3MsQlWfh4bn1bz6CXEOxnEXnEA=
 github.com/sergi/go-diff v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
 github.com/sergi/go-diff v1.1.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM=
 github.com/sethvargo/go-envconfig v1.1.0 h1:cWZiJxeTm7AlCvzGXrEXaSTCNgip5oJepekh/BOQuog=
diff --git a/appview/db/language.go b/appview/db/language.go
--- a/appview/db/language.go
+++ b/appview/db/language.go
@@ -52,6 +52,29 @@
 	return err
 }
 
+func GetRepoLanguages(e Execer, repoDid syntax.DID, ref string) (map[string]int64, error) {
+	rows, err := e.Query(
+		`select language, bytes from repo_languages where repo_did = ? and ref = ?`,
+		repoDid, ref,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	out := make(map[string]int64)
+	for rows.Next() {
+		var language string
+		var bytes int64
+		if err := rows.Scan(&language, &bytes); err != nil {
+			return nil, err
+		}
+		out[language] = bytes
+	}
+
+	return out, rows.Err()
+}
+
 func UpdateRepoLanguages(tx *sql.Tx, repoDid syntax.DID, ref string, langs []models.RepoLanguage) error {
 	err := DeleteRepoLanguages(
 		tx,
diff --git a/appview/repo/index.go b/appview/repo/index.go
--- a/appview/repo/index.go
+++ b/appview/repo/index.go
@@ -3,6 +3,7 @@
 import (
 	"errors"
 	"fmt"
+	"maps"
 	"net/http"
 	"net/url"
 	"slices"
@@ -27,6 +28,7 @@
 
 	"github.com/go-chi/chi/v5"
 	"github.com/go-enry/go-enry/v2"
+	"github.com/samber/lo"
 )
 
 func (rp *Repo) Index(w http.ResponseWriter, r *http.Request) {
@@ -130,24 +132,35 @@
 			// non-fatal
 		} else if ref == "" { // when request didn't specified ref, we are fetching default branch.
 			if err := func(repo syntax.DID, ref string, langs []*tangled.GitTempListLanguages_Language) error {
+				current := lo.SliceToMap(langs, func(lang *tangled.GitTempListLanguages_Language) (string, int64) {
+					return lang.Name, lang.Size
+				})
+
+				existing, err := db.GetRepoLanguages(rp.db, repo, ref)
+				if err != nil {
+					return err
+				}
+				if maps.Equal(current, existing) {
+					return nil
+				}
+
 				tx, err := rp.db.Begin()
 				if err != nil {
 					return err
 				}
 				defer tx.Rollback()
 
-				var mlangs []models.RepoLanguage
-				for _, lang := range langs {
-					mlangs = append(mlangs, models.RepoLanguage{
+				mlangs := lo.Map(langs, func(lang *tangled.GitTempListLanguages_Language, _ int) models.RepoLanguage {
+					return models.RepoLanguage{
 						RepoDid:      repo,
 						Ref:          ref,
 						IsDefaultRef: true,
 						Language:     lang.Name,
 						Bytes:        lang.Size,
-					})
-				}
+					}
+				})
 
-				if err := db.UpdateRepoLanguages(tx, syntax.DID(f.RepoDid), ref, mlangs); err != nil {
+				if err := db.UpdateRepoLanguages(tx, repo, ref, mlangs); err != nil {
 					return err
 				}