Heavy memory/performance optimizations #3

diff --git a/libs/web/luasrc/template.lua b/libs/web/luasrc/template.lua
index 9197779..4aa9b09 100644 (file)
--- a/libs/web/luasrc/template.lua
+++ b/libs/web/luasrc/template.lua
@@ -34,7 +34,7 @@ local coroutine = require "coroutine"
 
 local tostring, pairs, loadstring = tostring, pairs, loadstring
 local setmetatable, loadfile = setmetatable, loadfile
-local getfenv, setfenv = getfenv, setfenv
+local getfenv, setfenv, rawget = getfenv, setfenv, rawget
 local assert, type, error = assert, type, error
 
 --- LuCI template library.
@@ -55,10 +55,6 @@ compiler_mode = config.template.compiler_mode or "memory"
 -- Define the namespace for template modules
 context = util.threadlocal()
 
-viewns = {
-       include    = function(name) Template(name):render(getfenv(2)) end,
-}
-
 --- Manually  compile a given template into an executable Lua function
 -- @param template     LuCI template
 -- @return                     Lua template function
@@ -160,13 +156,7 @@ function Template.__init__(self, name)
        self.name = name
        
        -- Create a new namespace for this template
-       self.viewns = {sink=self.sink}
-       
-       -- Copy over from general namespace
-       util.update(self.viewns, viewns)
-       if context.viewns then
-               util.update(self.viewns, context.viewns)
-       end
+       self.viewns = context.viewns
        
        -- If we have a cached template, skip compiling and loading
        if self.template then
@@ -235,21 +225,15 @@ end
 function Template.render(self, scope)
        scope = scope or getfenv(2)
        
-       -- Save old environment
-       local oldfenv = getfenv(self.template)
-       
        -- Put our predefined objects in the scope of the template
-       util.resfenv(self.template)
-       util.updfenv(self.template, scope)
-       util.updfenv(self.template, self.viewns)
+       setfenv(self.template, setmetatable({}, {__index =
+               function(tbl, key)
+                       return rawget(tbl, key) or self.viewns[key] or scope[key]
+               end}))
        
        -- Now finally render the thing
        local stat, err = util.copcall(self.template)
        if not stat then
-               setfenv(self.template, oldfenv)
                error("Error in template %s: %s" % {self.name, err})
        end
-       
-       -- Reset environment
-       setfenv(self.template, oldfenv)
 end