diff --git a/pyren/mod_ecu.py b/pyren/mod_ecu.py
index 9431dc4..a8007cc 100755
--- a/pyren/mod_ecu.py
+++ b/pyren/mod_ecu.py
@@ -150,6 +150,9 @@ class ECU:
     
     self.elm.start_session( self.ecudata['startDiagReq'] )
 
+    if self.ecudata['pin'].lower()=='can' and self.DataIds:
+      self.elm.checkPerformaceLevel(self.DataIds)
+
     print "Done"  
     
     global ecudump
@@ -347,8 +350,9 @@ class ECU:
     else:
       initScreen = chr(27)+"[2J"+chr(27)+"[;H"
 
-  
     csvf = 0
+    self.elm.currentScreenDataIds = []
+
     mask = False
     masks = []
     datarefsToRemove = []
@@ -386,6 +390,7 @@ class ECU:
     if mod_globals.opt_csv and mod_globals.ext_cur_DTC == '000000':
       # prepare to csv save
       self.minimumrefreshrate = 0
+      mod_globals.opt_perform = True
       csvline = "sep=\\t\n"
       csvline += u"Time"
       nparams = 0
@@ -527,6 +532,8 @@ class ECU:
           time.sleep(tb + self.minimumrefreshrate - tc)
         tb = tc
 
+      self.elm.currentScreenDataIds = self.getDataIds(self.elm.rsp_cache.keys(), self.DataIds)
+
       if kb.kbhit():
         c = kb.getch()
         if len(c)!=1: continue
@@ -1026,6 +1033,23 @@ class ECU:
       map[key] = label
     
     return map
+  
+  def getDataIds(self, cache, dataids):
+    dataIdsList = []
+    if self.elm.performanceModeLevel == 1:
+      return dataIdsList
+    
+    for key in cache:
+      if key.startswith('22'):
+        if key[2:] in dataids.keys():
+          dataIdsList.append(dataids[key[2:]])
+
+    chunk_size = self.elm.performanceModeLevel
+    if dataIdsList: 
+      # split dataIdsList into chunks based on the performace level
+      return [dataIdsList[offset:offset+chunk_size] for offset in range(0, len(dataIdsList), chunk_size)]
+    
+    return dataIdsList
 
 def bukva( bt, l, sign = False ):
   S1 = chr((bt-l) % 26 + ord('A'))
diff --git a/pyren/mod_ecu_service.py b/pyren/mod_ecu_service.py
index c49d31c..90fb9a9 100755
--- a/pyren/mod_ecu_service.py
+++ b/pyren/mod_ecu_service.py
@@ -58,8 +58,14 @@ def executeService( service, elm, status = [], param = "", cache = False ):
   #tb = time.time()   #start time 
   #tc = tb
 
+  sentDataIdentifires = [] #dataids sent in one 22 request, nedded for a response parse
+  performanceMode = mod_globals.opt_perform and elm.performanceModeLevel > 1 
+
   commandToSend = service.startReq
-  
+
+  if performanceMode and elm.currentScreenDataIds:
+    commandToSend, sentDataIdentifires = prepareComplexRequest(service.startReq, elm.currentScreenDataIds)
+    
   if len(service.params)>0:  # but I support only one and do not support SnapShot
     if service.params[0]['type']=='DTC':
       param = mod_globals.ext_cur_DTC
@@ -78,6 +84,9 @@ def executeService( service, elm, status = [], param = "", cache = False ):
   rsp = rspStrip( rsp, commandToSend )
   first_rsp = rsp
 
+  if performanceMode and sentDataIdentifires:
+    first_rsp = parseComplexResponse(elm, service.simpleRsp, rsp, sentDataIdentifires)
+
   #print "Status:", status
   #print "Delay:",localDelay,
   #print "startReq	", service.startReq
@@ -151,6 +160,43 @@ def executeService( service, elm, status = [], param = "", cache = False ):
   print "\nSomething went wrong. Counter reached maximum value.\n"
   return ""  
 
+def prepareComplexRequest(request, screenDataIds):
+  commandToSend = request
+  sentDataIdentifires = []
+  screenDataIdsNumber = len(screenDataIds[0])
+
+  if screenDataIdsNumber > 1:
+    firstDataId = screenDataIds[0][0].id
+    if firstDataId == request[2:]:
+      commandToSend = request[:2]
+      for did in screenDataIds[0]:
+        commandToSend += did.id
+      
+      sentDataIdentifires = screenDataIds.pop(0) 
+   
+  return commandToSend, sentDataIdentifires
+
+def parseComplexResponse(elm, positiveRsp, response, sentDataIds):
+  first_rsp = ''
+  posInResp = 2
+  byteLength = 2
+  sentDataIdsLength = len(sentDataIds)
+  
+  for i in range(sentDataIdsLength):
+    dataId = response[posInResp:posInResp + 2 * byteLength]
+    posInResp += 2 * byteLength
+    didDataLength = int(sentDataIds[i].dataBitLength)/8
+    didData = response[posInResp: posInResp + didDataLength * byteLength]
+    posInResp += didDataLength * byteLength
+    if i == 0:
+      first_rsp = positiveRsp + dataId + didData
+    
+    resp = positiveRsp + dataId + didData
+    resp = ' '.join(a+b for a,b in zip(resp[::2], resp[1::2]))
+
+    elm.rsp_cache['22' + dataId] = resp
+
+  return first_rsp
 
 class ecu_service:
 
diff --git a/pyren/mod_elm.py b/pyren/mod_elm.py
index e7ef236..d6275fb 100644
--- a/pyren/mod_elm.py
+++ b/pyren/mod_elm.py
@@ -12,6 +12,7 @@ import string
 import threading
 import socket
 from datetime import datetime
+from collections import OrderedDict
 
 try:
     import androidhelper as android
@@ -517,6 +518,7 @@ class ELM:
     lastCMDtime = 0  # time when last command was sent to bus
     portTimeout = 5  # timeout of port (com or tcp)
     elmTimeout = 0  # timeout set by ATST
+    performanceModeLevel = 1 # number of dataids, that can be sent in one 22 request
     
     # error counters
     error_frame = 0
@@ -536,7 +538,8 @@ class ELM:
     startSession = ""
     lastinitrsp = ""
     
-    rsp_cache = {}  # cashes responses for current screen
+    currentScreenDataIds = [] #dataids displayed on current screen
+    rsp_cache = OrderedDict()  # cashes responses for current screen
     l1_cache = {}  # save number of frames in responces
     notSupportedCommands = {} # save them to not slow down polling
     ecudump = {}  # for demo only. contains responses for all 21xx and 22xxxx requests
@@ -620,7 +623,7 @@ class ELM:
         """ Clear L2 cache before screen update
         """
         #print 'Clearing L2 cache'
-        self.rsp_cache = {}
+        self.rsp_cache = OrderedDict()
 
         # if not mod_globals.opt_demo:
         #  self.rsp_cache = {}
@@ -1926,7 +1929,7 @@ class ELM:
         
         self.check_answer (self.cmd ("at at 1"))  # reset adaptive timing step 3
         self.check_answer (self.cmd ("at cra " + RXa))
-        
+
         self.check_adapter ()
     
     def init_iso(self):
@@ -2006,6 +2009,24 @@ class ELM:
         self.check_answer(self.cmd("81"))  # start session
 
         self.check_adapter ()
+
+    #check if ELM uderstand full Single Frame with desired response length
+    def checkPerformaceLevel(self, dataids):
+        performanceLevels = [3, 2]
+
+        for level in performanceLevels:
+            if len(dataids) >= level:
+                paramToSend = ''
+                frameLength = '{:02X}'.format(1 + level * 2)
+
+                for i in range(level):
+                    paramToSend += dataids.keys()[i]
+                cmd = frameLength + '22' + paramToSend + '1'
+
+                resp = self.send_raw(cmd)
+                if not '?' in resp and resp[2:4] != '7F':
+                    self.performanceModeLevel = level
+                    return
     
     def reset_elm(self):
         self.cmd ("at z")
diff --git a/pyren/mod_globals.py b/pyren/mod_globals.py
index 6b9a146..edb4b63 100755
--- a/pyren/mod_globals.py
+++ b/pyren/mod_globals.py
@@ -32,6 +32,7 @@ opt_can2      = False    #can connected to pins 13 and 12
 opt_ddtxml    = ""
 opt_stn       = False
 opt_sd        = False    #separate doc files
+opt_perform   = False
 
 dumpName = ""
 
diff --git a/pyren/pyren.py b/pyren/pyren.py
index 3687f62..29b3f21 100755
--- a/pyren/pyren.py
+++ b/pyren/pyren.py
@@ -237,7 +237,9 @@ def optParser():
     else:
       print "Development MODE"
       mod_globals.opt_dev       = True
-      mod_globals.opt_devses    = options.dev   
+      mod_globals.opt_devses    = options.dev 
+    if mod_globals.os == 'android':
+      mod_globals.opt_perform = True
     
 def main():
   '''Main function'''