diff --git a/go.mod b/go.mod
index 34634df58..8ea13ead0 100644
--- a/go.mod
+++ b/go.mod
@@ -22,7 +22,7 @@ require (
 	codeberg.org/gruf/go-runners v1.6.3
 	codeberg.org/gruf/go-sched v1.2.4
 	codeberg.org/gruf/go-storage v0.2.0
-	codeberg.org/gruf/go-structr v0.8.10
+	codeberg.org/gruf/go-structr v0.8.11
 	codeberg.org/superseriousbusiness/exif-terminator v0.9.0
 	github.com/DmitriyVTitov/size v1.5.0
 	github.com/KimMachineGun/automemlimit v0.6.1
diff --git a/go.sum b/go.sum
index e2f262f2c..ab0892565 100644
--- a/go.sum
+++ b/go.sum
@@ -72,8 +72,8 @@ codeberg.org/gruf/go-sched v1.2.4 h1:ddBB9o0D/2oU8NbQ0ldN5aWxogpXPRBATWi58+p++Hw
 codeberg.org/gruf/go-sched v1.2.4/go.mod h1:wad6l+OcYGWMA2TzNLMmLObsrbBDxdJfEy5WvTgBjNk=
 codeberg.org/gruf/go-storage v0.2.0 h1:mKj3Lx6AavEkuXXtxqPhdq+akW9YwrnP16yQBF7K5ZI=
 codeberg.org/gruf/go-storage v0.2.0/go.mod h1:o3GzMDE5QNUaRnm/daUzFqvuAaC4utlgXDXYO79sWKU=
-codeberg.org/gruf/go-structr v0.8.10 h1:uSapW97/StRnYEhCtycaM0isCsEMYC+tx/knYr6SiVo=
-codeberg.org/gruf/go-structr v0.8.10/go.mod h1:zkoXVrAnKosh8VFAsbP/Hhs8FmLBjbVVy5w/Ngm8ApM=
+codeberg.org/gruf/go-structr v0.8.11 h1:I3cQCHpK3fQSXWaaUfksAJRN4+efULiuF11Oi/m8c+o=
+codeberg.org/gruf/go-structr v0.8.11/go.mod h1:zkoXVrAnKosh8VFAsbP/Hhs8FmLBjbVVy5w/Ngm8ApM=
 codeberg.org/superseriousbusiness/exif-terminator v0.9.0 h1:/EfyGI6HIrbkhFwgXGSjZ9o1kr/+k8v4mKdfXTH02Go=
 codeberg.org/superseriousbusiness/exif-terminator v0.9.0/go.mod h1:gCWKduudUWFzsnixoMzu0FYVdxHWG+AbXnZ50DqxsUE=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
diff --git a/vendor/codeberg.org/gruf/go-structr/cache.go b/vendor/codeberg.org/gruf/go-structr/cache.go
index 4bea32c89..3705d7c7c 100644
--- a/vendor/codeberg.org/gruf/go-structr/cache.go
+++ b/vendor/codeberg.org/gruf/go-structr/cache.go
@@ -119,9 +119,9 @@ func (c *Cache[T]) Init(config CacheConfig[T]) {
 
 // Index selects index with given name from cache, else panics.
 func (c *Cache[T]) Index(name string) *Index {
-	for i := range c.indices {
-		if c.indices[i].name == name {
-			return &c.indices[i]
+	for i, idx := range c.indices {
+		if idx.name == name {
+			return &(c.indices[i])
 		}
 	}
 	panic("unknown index: " + name)
@@ -337,13 +337,16 @@ func (c *Cache[T]) Load(index *Index, keys []Key, load func([]Key) ([]T, error))
 		panic("not initialized")
 	}
 
-	for i := 0; i < len(keys); {
+	// Iterate keys and catch uncached.
+	toLoad := make([]Key, 0, len(keys))
+	for _, key := range keys {
+
 		// Value length before
 		// any below appends.
 		before := len(values)
 
 		// Concatenate all *values* from cached items.
-		index.get(keys[i].key, func(item *indexed_item) {
+		index.get(key.key, func(item *indexed_item) {
 			if value, ok := item.data.(T); ok {
 				// Append value COPY.
 				value = c.copy(value)
@@ -358,30 +361,22 @@ func (c *Cache[T]) Load(index *Index, keys []Key, load func([]Key) ([]T, error))
 
 		// Only if values changed did
 		// we actually find anything.
-		if len(values) != before {
-
-			// We found values at key,
-			// drop key from the slice.
-			copy(keys[i:], keys[i+1:])
-			keys = keys[:len(keys)-1]
-			continue
+		if len(values) == before {
+			toLoad = append(toLoad, key)
 		}
-
-		// Iter
-		i++
 	}
 
 	// Done with
 	// the lock.
 	unlock()
 
-	if len(keys) == 0 {
+	if len(toLoad) == 0 {
 		// We loaded everything!
 		return values, nil
 	}
 
-	// Load uncached values.
-	uncached, err := load(keys)
+	// Load uncached key values.
+	uncached, err := load(toLoad)
 	if err != nil {
 		return nil, err
 	}
@@ -515,8 +510,8 @@ func (c *Cache[T]) Trim(perc float64) {
 	}
 
 	// Compact index data stores.
-	for i := range c.indices {
-		c.indices[i].data.Compact()
+	for _, idx := range c.indices {
+		(&idx).data.Compact()
 	}
 
 	// Done with lock.
@@ -536,17 +531,17 @@ func (c *Cache[T]) Len() int {
 
 // Debug returns debug stats about cache.
 func (c *Cache[T]) Debug() map[string]any {
-	m := make(map[string]any)
+	m := make(map[string]any, 2)
 	c.mutex.Lock()
 	m["lru"] = c.lru.len
-	indices := make(map[string]any)
+	indices := make(map[string]any, len(c.indices))
 	m["indices"] = indices
-	for i := range c.indices {
+	for _, idx := range c.indices {
 		var n uint64
-		for _, l := range c.indices[i].data.m {
+		for _, l := range idx.data.m {
 			n += uint64(l.len)
 		}
-		indices[c.indices[i].name] = n
+		indices[idx.name] = n
 	}
 	c.mutex.Unlock()
 	return m
@@ -588,7 +583,7 @@ func (c *Cache[T]) store_value(index *Index, key string, value T) {
 
 	for i := range c.indices {
 		// Get current index ptr.
-		idx := &(c.indices[i])
+		idx := (&c.indices[i])
 		if idx == index {
 
 			// Already stored under
diff --git a/vendor/codeberg.org/gruf/go-structr/index.go b/vendor/codeberg.org/gruf/go-structr/index.go
index 127bddb1f..558832da9 100644
--- a/vendor/codeberg.org/gruf/go-structr/index.go
+++ b/vendor/codeberg.org/gruf/go-structr/index.go
@@ -197,8 +197,13 @@ func (i *Index) get(key string, hook func(*indexed_item)) {
 		return
 	}
 
-	// Iterate all entries in list.
-	l.rangefn(func(elem *list_elem) {
+	// Iterate the list.
+	for elem := l.head; //
+	elem != nil;        //
+	{
+		// Get next before
+		// any modification.
+		next := elem.next
 
 		// Extract element entry + item.
 		entry := (*index_entry)(elem.data)
@@ -206,18 +211,21 @@ func (i *Index) get(key string, hook func(*indexed_item)) {
 
 		// Pass to hook.
 		hook(item)
-	})
+
+		// Set next.
+		elem = next
+	}
 }
 
 // key uses hasher to generate Key{} from given raw parts.
 func (i *Index) key(buf *byteutil.Buffer, parts []unsafe.Pointer) string {
+	buf.B = buf.B[:0]
 	if len(parts) != len(i.fields) {
 		panicf("incorrect number key parts: want=%d received=%d",
 			len(i.fields),
 			len(parts),
 		)
 	}
-	buf.B = buf.B[:0]
 	if !allow_zero(i.flags) {
 		for x, field := range i.fields {
 			before := len(buf.B)
@@ -301,8 +309,13 @@ func (i *Index) delete(key string, hook func(*indexed_item)) {
 	// Delete at hash.
 	i.data.Delete(key)
 
-	// Iterate entries in list.
-	l.rangefn(func(elem *list_elem) {
+	// Iterate the list.
+	for elem := l.head; //
+	elem != nil;        //
+	{
+		// Get next before
+		// any modification.
+		next := elem.next
 
 		// Remove elem.
 		l.remove(elem)
@@ -319,7 +332,10 @@ func (i *Index) delete(key string, hook func(*indexed_item)) {
 
 		// Pass to hook.
 		hook(item)
-	})
+
+		// Set next.
+		elem = next
+	}
 
 	// Release list.
 	free_list(l)
@@ -375,17 +391,21 @@ var index_entry_pool sync.Pool
 func new_index_entry() *index_entry {
 	v := index_entry_pool.Get()
 	if v == nil {
-		v = new(index_entry)
+		e := new(index_entry)
+		e.elem.data = unsafe.Pointer(e)
+		v = e
 	}
 	entry := v.(*index_entry)
-	ptr := unsafe.Pointer(entry)
-	entry.elem.data = ptr
 	return entry
 }
 
 // free_index_entry releases the index_entry.
 func free_index_entry(entry *index_entry) {
-	entry.elem.data = nil
+	if entry.elem.next != nil ||
+		entry.elem.prev != nil {
+		should_not_reach()
+		return
+	}
 	entry.key = ""
 	entry.index = nil
 	entry.item = nil
diff --git a/vendor/codeberg.org/gruf/go-structr/item.go b/vendor/codeberg.org/gruf/go-structr/item.go
index 3191f2beb..6178e18e3 100644
--- a/vendor/codeberg.org/gruf/go-structr/item.go
+++ b/vendor/codeberg.org/gruf/go-structr/item.go
@@ -24,18 +24,22 @@ var indexed_item_pool sync.Pool
 func new_indexed_item() *indexed_item {
 	v := indexed_item_pool.Get()
 	if v == nil {
-		v = new(indexed_item)
+		i := new(indexed_item)
+		i.elem.data = unsafe.Pointer(i)
+		v = i
 	}
 	item := v.(*indexed_item)
-	ptr := unsafe.Pointer(item)
-	item.elem.data = ptr
 	return item
 }
 
 // free_indexed_item releases the indexed_item.
 func free_indexed_item(item *indexed_item) {
-	item.elem.data = nil
-	item.indexed = item.indexed[:0]
+	if len(item.indexed) > 0 ||
+		item.elem.next != nil ||
+		item.elem.prev != nil {
+		should_not_reach()
+		return
+	}
 	item.data = nil
 	indexed_item_pool.Put(item)
 }
@@ -50,7 +54,7 @@ func (i *indexed_item) drop_index(entry *index_entry) {
 			continue
 		}
 
-		// Move all index entries down + reslice.
+		// Reslice index entries minus 'x'.
 		_ = copy(i.indexed[x:], i.indexed[x+1:])
 		i.indexed[len(i.indexed)-1] = nil
 		i.indexed = i.indexed[:len(i.indexed)-1]
diff --git a/vendor/codeberg.org/gruf/go-structr/list.go b/vendor/codeberg.org/gruf/go-structr/list.go
index 764036d47..bf380aa26 100644
--- a/vendor/codeberg.org/gruf/go-structr/list.go
+++ b/vendor/codeberg.org/gruf/go-structr/list.go
@@ -40,9 +40,12 @@ func new_list() *list {
 
 // free_list releases the list.
 func free_list(list *list) {
-	list.head = nil
-	list.tail = nil
-	list.len = 0
+	if list.head != nil ||
+		list.tail != nil ||
+		list.len != 0 {
+		should_not_reach()
+		return
+	}
 	list_pool.Put(list)
 }
 
@@ -115,21 +118,28 @@ func (l *list) remove(elem *list_elem) {
 	elem.prev = nil
 
 	switch {
-	// elem is ONLY one in list.
-	case next == nil && prev == nil:
-		l.head = nil
-		l.tail = nil
+	case next == nil:
+		if prev == nil {
+			// next == nil && prev == nil
+			//
+			// elem is ONLY one in list.
+			l.head = nil
+			l.tail = nil
+		} else {
+			// next == nil && prev != nil
+			//
+			// elem is last in list.
+			l.tail = prev
+			prev.next = nil
+		}
 
-	// elem is front in list.
-	case next != nil && prev == nil:
+	case prev == nil:
+		// next != nil && prev == nil
+		//
+		// elem is front in list.
 		l.head = next
 		next.prev = nil
 
-	// elem is last in list.
-	case prev != nil && next == nil:
-		l.tail = prev
-		prev.next = nil
-
 	// elem in middle of list.
 	default:
 		next.prev = prev
@@ -139,17 +149,3 @@ func (l *list) remove(elem *list_elem) {
 	// Decr count
 	l.len--
 }
-
-// rangefn will range all elems in list, passing each to fn.
-func (l *list) rangefn(fn func(*list_elem)) {
-	if fn == nil {
-		panic("nil fn")
-	}
-	for e := l.head; //
-	e != nil;        //
-	{
-		n := e.next
-		fn(e)
-		e = n
-	}
-}
diff --git a/vendor/codeberg.org/gruf/go-structr/ordered_list.bak b/vendor/codeberg.org/gruf/go-structr/ordered_list.bak
new file mode 100644
index 000000000..46b56853f
--- /dev/null
+++ b/vendor/codeberg.org/gruf/go-structr/ordered_list.bak
@@ -0,0 +1,180 @@
+package structr
+
+import "sync"
+
+type Timeline[StructType any, PK comparable] struct {
+
+	// hook functions.
+	pkey func(StructType) PK
+	gte  func(PK, PK) bool
+	lte  func(PK, PK) bool
+	copy func(StructType) StructType
+
+	// main underlying
+	// ordered item list.
+	list list
+
+	// indices used in storing passed struct
+	// types by user defined sets of fields.
+	indices []Index
+
+	// protective mutex, guards:
+	// - TODO
+	mutex sync.Mutex
+}
+
+func (t *Timeline[T, PK]) Init(config any) {
+
+}
+
+func (t *Timeline[T, PK]) Index(name string) *Index {
+	for i := range t.indices {
+		if t.indices[i].name == name {
+			return &t.indices[i]
+		}
+	}
+	panic("unknown index: " + name)
+}
+
+func (t *Timeline[T, PK]) Insert(values ...T) {
+
+}
+
+func (t *Timeline[T, PK]) LoadTop(min, max PK, length int, load func(min, max PK, length int) ([]T, error)) ([]T, error) {
+	// Allocate expected no. values.
+	values := make([]T, 0, length)
+
+	// Acquire lock.
+	t.mutex.Lock()
+
+	// Wrap unlock to only do once.
+	unlock := once(t.mutex.Unlock)
+	defer unlock()
+
+	// Check init'd.
+	if t.copy == nil {
+		panic("not initialized")
+	}
+
+	// Iterate through linked list from top (i.e. head).
+	for next := t.list.head; next != nil; next = next.next {
+
+		// Check if we've gathered
+		// enough values from timeline.
+		if len(values) >= length {
+			return values, nil
+		}
+
+		item := (*indexed_item)(next.data)
+		value := item.data.(T)
+		pkey := t.pkey(value)
+
+		// Check if below min.
+		if t.lte(pkey, min) {
+			continue
+		}
+
+		// Update min.
+		min = pkey
+
+		// Check if above max.
+		if t.gte(pkey, max) {
+			break
+		}
+
+		// Append value copy.
+		value = t.copy(value)
+		values = append(values, value)
+	}
+}
+
+func (t *Timeline[T, PK]) LoadBottom(min, max PK, length int, load func(min, max PK, length int) ([]T, error)) ([]T, error) {
+	// Allocate expected no. values.
+	values := make([]T, 0, length)
+
+	// Acquire lock.
+	t.mutex.Lock()
+
+	// Wrap unlock to only do once.
+	unlock := once(t.mutex.Unlock)
+	defer unlock()
+
+	// Check init'd.
+	if t.copy == nil {
+		panic("not initialized")
+	}
+
+	// Iterate through linked list from bottom (i.e. tail).
+	for next := t.list.tail; next != nil; next = next.prev {
+
+		// Check if we've gathered
+		// enough values from timeline.
+		if len(values) >= length {
+			return values, nil
+		}
+
+		item := (*indexed_item)(next.data)
+		value := item.data.(T)
+		pkey := t.pkey(value)
+
+		// Check if above max.
+		if t.gte(pkey, max) {
+			continue
+		}
+
+		// Update max.
+		max = pkey
+
+		// Check if below min.
+		if t.lte(pkey, min) {
+			break
+		}
+
+		// Append value copy.
+		value = t.copy(value)
+		values = append(values, value)
+	}
+
+	// Done with
+	// the lock.
+	unlock()
+
+	// Attempt to load values up to given length.
+	next, err := load(min, max, length-len(values))
+	if err != nil {
+		return nil, err
+	}
+
+	// Acquire lock.
+	t.mutex.Lock()
+
+	// Store uncached values.
+	for i := range next {
+		t.store_value(
+			nil, "",
+			uncached[i],
+		)
+	}
+
+	// Done with lock.
+	t.mutex.Unlock()
+
+	// Append uncached to return values.
+	values = append(values, next...)
+
+	return values, nil
+}
+
+func (t *Timeline[T, PK]) index(value T) *indexed_item {
+	pk := t.pkey(value)
+
+	switch {
+	case t.list.len == 0:
+
+	case pk < t.list.head.data:
+	}
+}
+
+func (t *Timeline[T, PK]) delete(item *indexed_item) {
+
+}
diff --git a/vendor/codeberg.org/gruf/go-structr/queue.go b/vendor/codeberg.org/gruf/go-structr/queue.go
index 0e4f4e3cf..dab925f95 100644
--- a/vendor/codeberg.org/gruf/go-structr/queue.go
+++ b/vendor/codeberg.org/gruf/go-structr/queue.go
@@ -68,9 +68,9 @@ func (q *Queue[T]) Init(config QueueConfig[T]) {
 
 // Index selects index with given name from queue, else panics.
 func (q *Queue[T]) Index(name string) *Index {
-	for i := range q.indices {
-		if q.indices[i].name == name {
-			return &q.indices[i]
+	for i, idx := range q.indices {
+		if idx.name == name {
+			return &(q.indices[i])
 		}
 	}
 	panic("unknown index: " + name)
@@ -207,17 +207,17 @@ func (q *Queue[T]) Len() int {
 
 // Debug returns debug stats about queue.
 func (q *Queue[T]) Debug() map[string]any {
-	m := make(map[string]any)
+	m := make(map[string]any, 2)
 	q.mutex.Lock()
 	m["queue"] = q.queue.len
-	indices := make(map[string]any)
+	indices := make(map[string]any, len(q.indices))
 	m["indices"] = indices
-	for i := range q.indices {
+	for _, idx := range q.indices {
 		var n uint64
-		for _, l := range q.indices[i].data.m {
+		for _, l := range idx.data.m {
 			n += uint64(l.len)
 		}
-		indices[q.indices[i].name] = n
+		indices[idx.name] = n
 	}
 	q.mutex.Unlock()
 	return m
diff --git a/vendor/codeberg.org/gruf/go-structr/runtime.go b/vendor/codeberg.org/gruf/go-structr/runtime.go
index d2bdba380..6e8af83dd 100644
--- a/vendor/codeberg.org/gruf/go-structr/runtime.go
+++ b/vendor/codeberg.org/gruf/go-structr/runtime.go
@@ -2,7 +2,10 @@ package structr
 
 import (
 	"fmt"
+	"os"
 	"reflect"
+	"runtime"
+	"strings"
 	"unicode"
 	"unicode/utf8"
 	"unsafe"
@@ -182,7 +185,32 @@ func deref(p unsafe.Pointer, n uint) unsafe.Pointer {
 	return p
 }
 
+// eface_data returns the data ptr from an empty interface.
+func eface_data(a any) unsafe.Pointer {
+	type eface struct{ _, data unsafe.Pointer }
+	return (*eface)(unsafe.Pointer(&a)).data
+}
+
 // panicf provides a panic with string formatting.
 func panicf(format string, args ...any) {
 	panic(fmt.Sprintf(format, args...))
 }
+
+// should_not_reach can be called to indicated a
+// block of code should not be able to be reached,
+// else it prints callsite info with a BUG report.
+//
+//go:noinline
+func should_not_reach() {
+	pcs := make([]uintptr, 1)
+	_ = runtime.Callers(2, pcs)
+	fn := runtime.FuncForPC(pcs[0])
+	funcname := "go-structr" // by default use just our library name
+	if fn != nil {
+		funcname = fn.Name()
+		if i := strings.LastIndexByte(funcname, '/'); i != -1 {
+			funcname = funcname[i+1:]
+		}
+	}
+	os.Stderr.WriteString("BUG: assertion failed in " + funcname + "\n")
+}
diff --git a/vendor/codeberg.org/gruf/go-structr/util.go b/vendor/codeberg.org/gruf/go-structr/util.go
index 84c98074d..46535fcff 100644
--- a/vendor/codeberg.org/gruf/go-structr/util.go
+++ b/vendor/codeberg.org/gruf/go-structr/util.go
@@ -1,7 +1,5 @@
 package structr
 
-import "unsafe"
-
 // once only executes 'fn' once.
 func once(fn func()) func() {
 	var once int32
@@ -13,9 +11,3 @@ func once(fn func()) func() {
 		fn()
 	}
 }
-
-// eface_data returns the data ptr from an empty interface.
-func eface_data(a any) unsafe.Pointer {
-	type eface struct{ _, data unsafe.Pointer }
-	return (*eface)(unsafe.Pointer(&a)).data
-}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 81907ce93..ea6f6b10a 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -66,7 +66,7 @@ codeberg.org/gruf/go-storage/disk
 codeberg.org/gruf/go-storage/internal
 codeberg.org/gruf/go-storage/memory
 codeberg.org/gruf/go-storage/s3
-# codeberg.org/gruf/go-structr v0.8.10
+# codeberg.org/gruf/go-structr v0.8.11
 ## explicit; go 1.21
 codeberg.org/gruf/go-structr
 # codeberg.org/superseriousbusiness/exif-terminator v0.9.0