milo: improve list perf

milo/apis/miniAdapter.lua

@@ -49,7 +49,6 @@ function Adapter:listItems(throttle)
       throttle()
     end
   end
-  itemDB:flush()
 
   self.cache = cache
 end

milo/apis/storage.lua

@@ -2,6 +2,7 @@ local Adapter = require('miniAdapter')
 local class   = require('class')
 local Event   = require('event')
 local itemDB  = require('itemDB')
+local sync    = require('sync').sync
 local Util    = require('util')
 
 local device = _G.device
@@ -168,14 +169,31 @@ function Storage:listItems(throttle)
   end
 
   local cache = { }
+  sync(self, function()
+
     throttle = throttle or Util.throttle()
 
+    local t = { }
+    for _, adapter in self:onlineAdapters() do
+      if adapter.dirty then
+        table.insert(t, function()
+          adapter:listItems(throttle)
+          adapter.dirty = false
+        end)
+      end
+    end
+
+    _G._debug('STORAGE: refreshing ' .. #t .. ' inventories')
+    local timer = Timer()
+    parallel.waitForAll(table.unpack(t))
+    _G._debug('STORAGE: refresh in ' .. timer())
+
     local timer = Timer()
     for _, adapter in self:onlineAdapters() do
       if adapter.dirty then
         _G._debug('STORAGE: refreshing ' .. adapter.name)
-      adapter:listItems(throttle)
+        --adapter:listItems(throttle)
-      adapter.dirty = false
+        --adapter.dirty = false
       end
       local rcache = adapter.cache or { }
       for key,v in pairs(rcache) do
@@ -192,11 +210,13 @@ function Storage:listItems(throttle)
         throttle()
       end
     end
-_G._debug('STORAGE: refresh in ' .. timer())
+    itemDB:flush()
+    _G._debug('STORAGE: cached in ' .. timer())
 
     self.dirty = false
     self.cache = cache
-  return cache
+  end)
+  return self.cache
 end
 
 function Storage:updateCache(adapter, item, count)