Performance benefits of sealed class in .NET

[Kent Sharkey]

Meziantou[^]:

A new analyzer should be available in .NET 7 to detect classes that can be sealed. In this post, I'll show some performance benefits of sealed classes.

"Signed, sealed, delivered, I'm yours"

But don't put it in your will, as there's no inheritance!

[Dan Neely]

Either some of those benchmarks aren't being reported correctly, or the compiler has optimized the inner loop into a no-op.

Quote:

Method Mean Error StdDev Ratio Code Size
NonSealed 0.0668 ns 0.0156 ns 0.0138 ns 1.00 64 B
Sealed 0.0307 ns 0.0209 ns 0.0185 ns 0.50 35 B

A duration of 0.0307ns corresponds to 1 clock cycle on a 32.5ghz chip. :doh: Even competitive overclockers using liquid nitrogen cooling can't get that fast.

Did you ever see history portrayed as an old man with a wise brow and pulseless heart, weighing all things in the balance of reason? Is not rather the genius of history like an eternal, imploring maiden, full of fire, with a burning heart and flaming soul, humanly warm and humanly beautiful? --Zachris Topelius