1 files changed, 0 insertions, 65 deletions
diff --git a/script/vm/chain.lua b/script/vm/chain.lua
deleted file mode 100644
index 6e7c6ac7..00000000
--- a/script/vm/chain.lua
+++ /dev/null
@@ -1,65 +0,0 @@
-local valueMgr = require 'vm.value'
-local sourceMgr = require 'vm.source'
-
-local mt = {}
-mt.__index = mt
-mt.type = 'chain'
-
-mt.min = 100
-mt.max = 100
-mt.count = 0
-
-function mt:clearCache()
-    if self.count <= self.max then
-        return
-    end
-    local clock = os.clock()
-    local n = 0
-    for uri, value in pairs(self.cache) do
-        local ok = value:eachInfo(function ()
-            return true
-        end)
-        if ok then
-            n = n + 1
-        else
-            value:getSource():kill()
-            self.cache[uri] = nil
-        end
-    end
-    self.count = n
-    self.max = self.count * 1.1 + 10
-    if self.max < self.min then
-        self.max = self.min
-    end
-    local passed = os.clock() - clock
-    if passed > 0.1 then
-        log.warn(('chain:clearCache takes: [%.3f]sec, self.count: %d'):format(passed, self.count))
-    end
-end
-
-function mt:get(uri)
-    if not self.cache[uri] then
-        self.count = self.count + 1
-        self:clearCache()
-        self.cache[uri] = valueMgr.create('any', sourceMgr.dummy())
-        self.cache[uri]:markGlobal()
-        self.cache[uri].uri = uri
-    end
-    return self.cache[uri]
-end
-
-function mt:remove()
-    if self.removed then
-        return
-    end
-    self.removed = true
-    for _, value in pairs(self.cache) do
-        value:getSource():kill()
-    end
-end
-
-return function ()
-    return setmetatable({
-        cache = {},
-    }, mt)
-end