diff --git a/Zenitha b/Zenitha
index 5a4b6a08..b2c77f2e 160000
--- a/Zenitha
+++ b/Zenitha
@@ -1 +1 @@
-Subproject commit 5a4b6a08a5271fc5b47b9648191048ff6cbb0c98
+Subproject commit b2c77f2e17a760dc4748b0896afda895ca73f693
diff --git a/assets/game/acryPlayer.lua b/assets/game/acryPlayer.lua
index 3ea3ca91..72806dac 100644
--- a/assets/game/acryPlayer.lua
+++ b/assets/game/acryPlayer.lua
@@ -568,6 +568,7 @@ function AP:tickStep()
         local list=self.acryProcessQueue.explosion
         for i=1,#list do
             local acry=list[i]
+            -- TODO
         end
         TABLE.clear(list)
     end
diff --git a/assets/game/basePlayer.lua b/assets/game/basePlayer.lua
index e6a62d29..31d5ece5 100644
--- a/assets/game/basePlayer.lua
+++ b/assets/game/basePlayer.lua
@@ -782,14 +782,10 @@ function P:initialize()
     end
 end
 local dumpIgnore={
-    'P.soundTimeHistory',
-    'P.particles',
-    'P.texts',
+    ['P.soundTimeHistory']=true,
+    ['P.particles']=true,
+    ['P.texts']=true,
 }
-for _,v in next,dumpIgnore do
-    dumpIgnore[v]=true
-end
-TABLE.clear(dumpIgnore)
 local function dump(self,L,t,path)
     local s='{'
     local count=1
diff --git a/assets/game/rectField.lua b/assets/game/rectField.lua
index 68158958..19bf4afd 100644
--- a/assets/game/rectField.lua
+++ b/assets/game/rectField.lua
@@ -1,4 +1,5 @@
 local gc=love.graphics
+local buffer=require"string.buffer"
 
 ---@class Techmino.RectField
 ---@field _width number
@@ -32,30 +33,28 @@ function F:export_table_simp()
     return t
 end
 function F:export_string_simp()
-    local str=''
+    local buf=buffer.new((self._width+1)*#self._matrix)
 
     for y=1,#self._matrix do
-        local buf=''
         for x=1,self._width do
-            buf=buf..(self._matrix[y][x] and 'x' or '_')
+            buf:put(self._matrix[y][x] and 'x' or '_')
         end
-        str=str..buf..'/'
+        buf:put('/')
     end
 
-    return str
+    return buf:get()
 end
 function F:export_string_color()
-    local str=''
+    local buf=buffer.new((self._width*2+1)*#self._matrix)
 
     for y=1,#self._matrix do
-        local buf=''
         for x=1,self._width do
-            buf=buf..STRING.base64[self._matrix[y][x].color]
+            buf:put(STRING.toHex(self._matrix[y][x].color,2))
         end
-        str=str..buf..'/'
+        buf:put('/')
     end
 
-    return str
+    return buf:get()
 end
 function F:export_fumen()
     local str=''
diff --git a/assets/scene_app/link.lua b/assets/scene_app/link.lua
index 80c1966e..c20a326a 100644
--- a/assets/scene_app/link.lua
+++ b/assets/scene_app/link.lua
@@ -78,7 +78,7 @@ local function resetBoard()
     field.full=true
     total=total*2
 
-    TABLE.clear(field)
+    TABLE.clearList(field)
     for y=1,field.r do
         field[y]={}
         for x=1,field.c do
diff --git a/assets/scene_app/piano.lua b/assets/scene_app/piano.lua
index d6b45050..a3a4df34 100644
--- a/assets/scene_app/piano.lua
+++ b/assets/scene_app/piano.lua
@@ -413,8 +413,8 @@ local scene={}
 
 local function stopAllSounds()
     for _,effect in next,activeEventMap do effect:stop(FMOD.FMOD_STUDIO_STOP_ALLOWFADEOUT) end
-    TABLE.clearAll(activeEventMap)
-    TABLE.clearAll(objPool)
+    TABLE.clear(activeEventMap)
+    TABLE.clear(objPool)
 end
 function scene.load()
     stopAllSounds()
diff --git a/assets/vctrl.lua b/assets/vctrl.lua
index 516173d2..40dc1214 100644
--- a/assets/vctrl.lua
+++ b/assets/vctrl.lua
@@ -433,7 +433,7 @@ end
 
 function VCTRL.importSettings(data)
     if not data then return end
-    TABLE.clear(VCTRL)
+    TABLE.clearList(VCTRL)
     for i=1,#data do
         local w=data[i]
         VCTRL[i]=(