c# - Performance concern while opening a dialog repetitively in wpf -


i have launch dialog button creates view model of window , bind the window(it having ui virutalization enabled). takes 1 second launch dialog @ first click. if open same dialog or back, starts taking more time in populating grid data source next iteration. if give pause, again open window, takes approx 1 or 2 seconds.

for first time populating item source take 1 second: next time populating item source takes  2 second next time populating item source takes  3 second next time populating item source takes  6 second next time populating item source takes  8 second

however, if call gc.collect() not recommended, populating grid data source takes approx 1 second. calling of 

gc.collect() gc.waitforpendingfinalizer() gc.collect()

cost me time every iteration.

i know calling gc.collect not option. can suggest how can boost application performance.

i more concerned user machine machine configuration whereas user machine may not fast.

it difficult pinpoint exact issue without looking @ code. however, can happen due few reasons.

  1. it loads more data (may double?) evertime. have indicated loads 200 records everytime. make sure logic correct , clears previous data before re-publish.

  2. make sure unsubscribe event subscriptions. there can hiden events triggering previous grid instances. can check putting break on handle , checking if trigger more once.

  3. look @ every disposable instances creating , check if dispose them appropriately. not disposing disposable instance , may reason gc.collect help.

  4. i not quite sure virtualization involvement here. perform same test without virtualization make sure that's not reason.


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