diff --git a/packages/ludic.ui/backend.ludic b/packages/ludic.ui/backend.ludic
index 9d59d10c..76d78f7e 100644
--- a/packages/ludic.ui/backend.ludic
+++ b/packages/ludic.ui/backend.ludic
@@ -45,6 +45,9 @@ export state UiState {
   ev_args: []Val = new []Val
   @max(64) ev_ring: []Val = ev_ring_new()         # eval.ludic: calls' answers while an action runs, EV_RING of them, made with the state
   ev_ring_at: int = 0
+  nt_evs: []Val = nt_evs_new()          # native.ludic: fired events' objects, NT_EVS of them, made with the state
+  nt_ev_at: int = 0
+  hd_ev: Val = hd_ev_new()               # hold.ludic: the held control's event, filled in place
   cv_texts: []string = new []string      # units_pieces.ludic: a value's var() pieces, kept
   tx_pieces: [][]string = new [][]string # eval_text.ludic: a text's pieces, a list a depth
   tx_depth: int = 0
diff --git a/packages/ludic.ui/controls.ludic b/packages/ludic.ui/controls.ludic
index fcea9b18..fb145c35 100644
--- a/packages/ludic.ui/controls.ludic
+++ b/packages/ludic.ui/controls.ludic
@@ -25,7 +25,7 @@ function ct_activate(ui_st: mut UiState, n: UiNode) -> void {
   let t = ct_type(n)
   if t == "checkbox" { ct_change(ui_st, n, vl_bool(ui_st, not ui_attr_on(n, "checked"))) } else if t == "radio" { ct_change(ui_st, n, ui_attr(n, "value")) } else if t == "select" { ct_step(ui_st, n, 1) } else if t == "key" { ct_key_start(ui_st, n) } else if t == "number" { ct_num_commit(ui_st, n) } else if t == "text" { ct_submit(ui_st, n) } else if t == "" {
     ui_sound(ui_st, ct_sound(n))
-    ui_fire(ui_st, n, "press", Value.null())
+    ui_fire(ui_st, n, "press", ui_st.fc_none)
   }
 }
 function ct_step(ui_st: mut UiState, n: UiNode, d: int) -> void {
diff --git a/packages/ludic.ui/focus.ludic b/packages/ludic.ui/focus.ludic
index ce0aa339..939c9214 100644
--- a/packages/ludic.ui/focus.ludic
+++ b/packages/ludic.ui/focus.ludic
@@ -27,7 +27,7 @@ function fc_keys(ui_st: mut UiState, root: UiNode) -> void {
   let top = pp_top(root)
   if top != null { fc_collect(ui_st, top) } else { fc_collect(ui_st, root) }
   if ct_key_capture(ui_st, ui_st.fc_list) { return }
-  if top != null and ui_st.in_now.escape { ui_fire(ui_st, top, "close", Value.null()) }
+  if top != null and ui_st.in_now.escape { ui_fire(ui_st, top, "close", ui_st.fc_none) }
   let i = ui_st.in_now
   if fc_find(ui_st) < 0 { fc_autofocus(ui_st) }
   let at = fc_find(ui_st)
diff --git a/packages/ludic.ui/hold.ludic b/packages/ludic.ui/hold.ludic
index cf2dad52..3fbd78d2 100644
--- a/packages/ludic.ui/hold.ludic
+++ b/packages/ludic.ui/hold.ludic
@@ -1,6 +1,12 @@
 # hold.ludic - on-hold: every frame a control is held down - by the pointer (wherever it goes until it
 # is let go), or by Enter or the pad's A on the focus - with event.dt, the seconds since the last
 # frame, and event.t, how long it has been held, on the ui clock
+function hd_ev_new() -> Val {
+  let v = Value.object()
+  value_set_float(v, "dt", 0.0)                  # its keys made with the state, so a first hold grows nothing
+  value_set_float(v, "t", 0.0)
+  return v
+}
 function hd_tick(ui_st: mut UiState, root: UiNode) -> void {
   var key = ui_st.fr_key_press
   if ui_st.fr_press_key != "" and ui_st.in_now.down { key = ui_st.fr_press_key }
@@ -16,9 +22,9 @@ function hd_tick(ui_st: mut UiState, root: UiNode) -> void {
   }
   let n = fr_node(root, key)
   if n != null {
-    let v = Value.object()
-    Value.put(v, "dt", Value.float(now - ui_st.hd_last))
-    Value.put(v, "t", Value.float(now - ui_st.hd_t0))
+    let v = ui_st.hd_ev                        # one object kept with the state, filled in place each held frame
+    value_set_float(v, "dt", now - ui_st.hd_last)
+    value_set_float(v, "t", now - ui_st.hd_t0)
     ui_fire(ui_st, n, "hold", v)
   }
   ui_st.hd_last = now
diff --git a/packages/ludic.ui/native.ludic b/packages/ludic.ui/native.ludic
index 0a040561..cf36efb0 100644
--- a/packages/ludic.ui/native.ludic
+++ b/packages/ludic.ui/native.ludic
@@ -62,14 +62,32 @@ function nt_fired_run(ui_st: mut UiState) -> void {
   ui_st.nt_sp_names = names
   ui_st.nt_sp_vals = vals
 }
+# an event's object, from NT_EVS kept with the state: an event is read by its handler long before
+# NT_EVS more come round to its object
+const NT_EVS: int = 16
+function nt_evs_new() -> []Val {
+  let l = new []Val
+  for i in 0 .. NT_EVS {
+    let o = Value.object()
+    value_set_str(o, "name", "")               # its keys made now, so a first event grows nothing
+    Value.put(o, "value", Value.null())
+    push(l, o)
+  }
+  return l
+}
+function nt_ev_next(ui_st: mut UiState) -> Val {
+  let at = ui_st.nt_ev_at % NT_EVS
+  ui_st.nt_ev_at = at + 1
+  return ui_st.nt_evs[at]
+}
 # the element's on-<name>, with `event` bound to what happened
 function nt_run(ui_st: mut UiState, n: UiNode, name: string, value: Val) -> void {
   if n.on_names == null or not n.enabled { return }
   for i in 0 .. len(n.on_names) {
     if n.on_names[i] == name {
-      var ev = Value.object()
+      var ev = nt_ev_next(ui_st)
       if (lk_in(PE_NAMES, name) or name == "hold") and Value.kind(value) == 6 { ev = value }
-      Value.put(ev, "name", Value.str(name))
+      value_set_str(ev, "name", name)
       Value.put(ev, "value", value)
       let e = env_new(ui_st, n.env)
       env_bind(e, "event", ev)
diff --git a/packages/ludic.ui/pointer.ludic b/packages/ludic.ui/pointer.ludic
index 1be91edd..eda02f83 100644
--- a/packages/ludic.ui/pointer.ludic
+++ b/packages/ludic.ui/pointer.ludic
@@ -21,7 +21,7 @@ function fr_pointer(ui_st: mut UiState, root: UiNode) -> void {
   if i.down and ui_st.fr_press_key != "" { ct_drag(ui_st, root, ui_st.fr_press_key, i.x, i.y) }
   if not i.down and ui_st.in_was_down {
     let was = fr_node(root, ui_st.fr_press_key)
-    if was != null { ui_fire(ui_st, was, "up", Value.null()) }
+    if was != null { ui_fire(ui_st, was, "up", ui_st.fc_none) }
     if hit != null and hit.key == ui_st.fr_press_key and hit.enabled { ct_activate(ui_st, hit) }
     ui_st.fr_press_key = ""
   }
@@ -32,7 +32,7 @@ function fr_press(ui_st: mut UiState, hit: UiNode, x: float, y: float) -> void {
   if hit == null { return }
   ui_st.fr_press_key = hit.key
   if hit.focusable { ui_focus(ui_st, hit.key) }
-  if hit.enabled { ui_fire(ui_st, hit, "down", Value.null()) }
+  if hit.enabled { ui_fire(ui_st, hit, "down", ui_st.fc_none) }
   ct_press(ui_st, hit, x, y)
 }
 # :active - the press began on it, or inside it, and is still held (by the pointer, Enter or A)
diff --git a/packages/ludic.ui/popover.ludic b/packages/ludic.ui/popover.ludic
index 374ea5df..aa6ec1dc 100644
--- a/packages/ludic.ui/popover.ludic
+++ b/packages/ludic.ui/popover.ludic
@@ -25,7 +25,7 @@ function pp_pointer(ui_st: mut UiState, top: UiNode) -> bool {
   if not (i.down and not ui_st.in_was_down) { return false }
   if i.x >= top.x and i.y >= top.y and i.x < top.x + top.cw and i.y < top.y + top.ch { return false }
   ui_st.fr_press_key = ""
-  ui_fire(ui_st, top, "close", Value.null())
+  ui_fire(ui_st, top, "close", ui_st.fc_none)
   return true
 }
 function pp_draw_top(ui_st: mut UiState) -> void {