Performancebury Tales

Sisyphus

Performance is

hard

Sisyphus

Youcannot

stop

Sisyphus

..but..

Sisyphus

It’sNOT

useless

Samsara

SamsaraNon-synchronized access to shared• System.Collections.Hashtable• System.Collections.Generic.Dictionary<>• System.Collections.Generic.Hashset<>

Samsara

The Noble Eightfold Path• Do not forget to lock shared hastables!• Do not forget to lock shared hastables!• Do not forget to lock shared hastables!• Do not forget to lock shared hastables!• Do not forget to lock shared hastables!• Do not forget to lock shared hastables!• Do not forget to lock shared hastables!• Do not forget to lock shared hastables!

Lernaean Hydra

Lernaean Hydra

System.Diagnostics.Debug

The 300 Spartans

The 300 SpartansOutbound connections

Narcissus

Narcissus

Compiled expressions

Creation method Time, ms (1 mln iterations)

Activator.CreateInstance 1508

Compiled Expression 33

Constructor 25

Narcissus

Enum.ToString() can be 85% faster

How to implement QuickToString:http://der-waldgeist.blogspot.com/2010/08/3-enumtostring.html

Ask me!

• Alexey Nedilko• alexey_nedilko@epam.com• skype:alexey.nedilko