How do you measure performance / fps

Comments

• techdojo Guru

  September 2012

  Here's the code I usually use

  -- ------------------------------------------------------------- -- local methods required to put an FPS counter on the screen...   local frame = 0 local timer = os.timer() local qFloor = math.floor local fps   -- Global table for OSD DEBUG = { "","","","","","","","","","","","", } local DEBUG_TXT = {}   function DEBUG_RESET() for i=1,#DEBUG do DEBUG[i] = "" end end   -- -------------------------------------------------------------   local function updateFPS(e)   frame = frame + 1 if frame == 60 then   local currentTimer = os.timer() fps:setText(""..qFloor(60 / (currentTimer - timer)))   local width = fps:getWidth() fps:setPosition(320-(width+10), 28) frame = 0; timer = currentTimer end   for i=1,#DEBUG_TXT do DEBUG_TXT[i]:setText(DEBUG[i]) end   end   -- ------------------------------------------------   initFPS = function(group)   fps = TextField.new(nil," ") fps:setTextColor(0x00FFFF) fps:setScale(2,2) fps:addEventListener(Event.ENTER_FRAME,updateFPS) group:addChild(fps)   local y = 20 for i=1,#DEBUG do local d = TextField.new(nil,DEBUG[i]) d:setTextColor(0x00FFFF) d:setScale(2,2) d:setPosition(4,y); y = y + 18 group:addChild(d) DEBUG_TXT[i] = d end   end   initFPS(stage) -- Add a quick FPS counter on the screen (REMOVE for final build)

  Just add the above to the end of main.lua file and you should be good to go.
  Also I added an extra bit - I declare a simple global table called DEBUG all with empty strings.
  
  What this means is that you can then set any element of the DEBUG array to any value (or string) and it'll be displayed on the screen.
  
  ie.
  
  DEBUG[1] = count
  DEBUG[2] = someString
  
  etc
  
  Any changes will get instantly updated on screen - it's useful to be able to put a "watch" on a particular value without having loads of print statements cluttering up the output log.
  
  You can call the DEBUG_RESET() function to clear all of the entries.
  
  Hope this helps.
  
  Jon...
  

  WhiteTree Games - Home, home on the web, where the bits and bytes they do play!
  #MakeABetterGame! "Never give up, Never NEVER give up!" - Winston Churchill

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• ar2rsawseen Maintainer

  September 2012

  http://www.giderosmobile.com/forum/discussion/486/how-do-i-display-fps
  
  I used site:giderosmobile.com/forum fps in google search

  http://appcodingeasy.com/Gideros-Mobile

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• bowerandy Guru

  September 2012 edited September 2012

  @Tom2012, I use my BhDebugInfo class to display a simple debugging HUD that includes device info, fps and used memory. You can get it on GitHub. You just need to include the Lua file (and its font) in your project for it to work. You can turn if off by choosing "Exclude from execution" in the Gideros IDE.
  
  best regards

  tweets: @ insidebowerhaus blog: http://bowerhaus.eu/blog/blog.html

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• Tom2012 Guru

  September 2012

  Thanks for the replies everyone.
  
  I found the best solution for me was:
  
  local frame = 0
  local timer = os.timer()
  local function displayFps()
  frame = frame + 1
  if frame == 60 then
  local currentTimer = os.timer()
  print(60 / (currentTimer - timer))
  frame = 0
  timer = currentTimer
  end
  end
  
  stage:addEventListener(Event.ENTER_FRAME, displayFps)

  Lost Caverns - my little game on Play Store - https://play.google.com/store/apps/details?id=com.firecroc.lostcaverns

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