.NET Performance Tips#VISUALIZED

Igal Tabachnik

@hmemcpy

WoW – Word of Warning

•10 PREMATURE OPTIMIZATION' …is the root of all evil (mostly)

•20 MEASURE ALL THE THINGS' otherwise, you’re guessing

•30 GOTO 10

High Memory Traffic

• Garbage Collection (GC) internals are unknown to the public (yet). Only the CLR team knows what’s really going on.

• Gen0 -> Gen1 -> Gen2

• More memory traffic = more GC time/app freeze/OOM

Memory Traffic: GC Pressure

•Hidden allocations

•Boxing

•Other stuff

LINQ

More LINQ

params

params – decompiled

IEnumerable<T> vs List<T>

IEnumerable<T> vs List<T>

/j #DEMO

GC.Collect()

GOTO 10

Finalize()

•Google:

• “resharper heapview”

• “roslyn perf tips” (bit.ly/dotnet-perf)

• “download ozcode” :)

THANK YOU!

•/msg nickserv +twitter @hmemcpy

• /msg nickserv +email hmemcpy@gmail.com