3 files changed, 42 insertions, 0 deletions
diff --git a/internal/cache/cache.go b/internal/cache/cache.go
index ec0ec3faa..777088f07 100644
--- a/internal/cache/cache.go
+++ b/internal/cache/cache.go
@@ -248,6 +248,7 @@ func (c *Caches) Sweep(threshold float64) {
 	c.GTS.Status().Trim(threshold)
 	c.GTS.StatusFave().Trim(threshold)
 	c.GTS.Tag().Trim(threshold)
+	c.GTS.ThreadMute().Trim(threshold)
 	c.GTS.Tombstone().Trim(threshold)
 	c.GTS.User().Trim(threshold)
 	c.Visibility.Trim(threshold)
diff --git a/internal/cache/gts.go b/internal/cache/gts.go
index 16a1585f7..d96b7267f 100644
--- a/internal/cache/gts.go
+++ b/internal/cache/gts.go
@@ -57,6 +57,7 @@ type GTSCaches struct {
 	statusFave       *result.Cache[*gtsmodel.StatusFave]
 	statusFaveIDs    *SliceCache[string]
 	tag              *result.Cache[*gtsmodel.Tag]
+	threadMute       *result.Cache[*gtsmodel.ThreadMute]
 	tombstone        *result.Cache[*gtsmodel.Tombstone]
 	user             *result.Cache[*gtsmodel.User]
 
@@ -93,6 +94,7 @@ func (c *GTSCaches) Init() {
 	c.initStatus()
 	c.initStatusFave()
 	c.initTag()
+	c.initThreadMute()
 	c.initStatusFaveIDs()
 	c.initTombstone()
 	c.initUser()
@@ -249,6 +251,11 @@ func (c *GTSCaches) Tag() *result.Cache[*gtsmodel.Tag] {
 	return c.tag
 }
 
+// ThreadMute provides access to the gtsmodel ThreadMute database cache.
+func (c *GTSCaches) ThreadMute() *result.Cache[*gtsmodel.ThreadMute] {
+	return c.threadMute
+}
+
 // StatusFaveIDs provides access to the status fave IDs list database cache.
 func (c *GTSCaches) StatusFaveIDs() *SliceCache[string] {
 	return c.statusFaveIDs
@@ -712,6 +719,7 @@ func (c *GTSCaches) initStatus() {
 		{Name: "URI"},
 		{Name: "URL"},
 		{Name: "BoostOfID.AccountID"},
+		{Name: "ThreadID", Multi: true},
 	}, func(s1 *gtsmodel.Status) *gtsmodel.Status {
 		s2 := new(gtsmodel.Status)
 		*s2 = *s1
@@ -778,6 +786,28 @@ func (c *GTSCaches) initTag() {
 	c.tag.IgnoreErrors(ignoreErrors)
 }
 
+func (c *GTSCaches) initThreadMute() {
+	cap := calculateResultCacheMax(
+		sizeOfThreadMute(), // model in-mem size.
+		config.GetCacheThreadMuteMemRatio(),
+	)
+
+	log.Infof(nil, "cache size = %d", cap)
+
+	c.threadMute = result.New([]result.Lookup{
+		{Name: "ID"},
+		{Name: "ThreadID", Multi: true},
+		{Name: "AccountID", Multi: true},
+		{Name: "ThreadID.AccountID"},
+	}, func(t1 *gtsmodel.ThreadMute) *gtsmodel.ThreadMute {
+		t2 := new(gtsmodel.ThreadMute)
+		*t2 = *t1
+		return t2
+	}, cap)
+
+	c.threadMute.IgnoreErrors(ignoreErrors)
+}
+
 func (c *GTSCaches) initTombstone() {
 	// Calculate maximum cache size.
 	cap := calculateResultCacheMax(
diff --git a/internal/cache/size.go b/internal/cache/size.go
index f578b9402..3e77c68ac 100644
--- a/internal/cache/size.go
+++ b/internal/cache/size.go
@@ -194,6 +194,7 @@ func totalOfRatios() float64 {
 		config.GetCacheStatusFaveMemRatio() +
 		config.GetCacheStatusFaveIDsMemRatio() +
 		config.GetCacheTagMemRatio() +
+		config.GetCacheThreadMuteMemRatio() +
 		config.GetCacheTombstoneMemRatio() +
 		config.GetCacheUserMemRatio() +
 		config.GetCacheWebfingerMemRatio() +
@@ -511,6 +512,16 @@ func sizeofTag() uintptr {
 	}))
 }
 
+func sizeOfThreadMute() uintptr {
+	return uintptr(size.Of(&gtsmodel.ThreadMute{
+		ID:        exampleID,
+		CreatedAt: exampleTime,
+		UpdatedAt: exampleTime,
+		ThreadID:  exampleID,
+		AccountID: exampleID,
+	}))
+}
+
 func sizeofTombstone() uintptr {
 	return uintptr(size.Of(&gtsmodel.Tombstone{
 		ID:        exampleID,