Shulou(Shulou.com)06/03 Report--

This article focuses on "what are the new features of .NET 6 Preview 3". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn what are the new features of .NET 6 Preview 3.

Library improves faster processing of new value-added types as dictionary values

.net 6 Preview 3 introduces a new unsafe API CollectionsMarshal.GetValueRef, which allows you to update values locally with numerous copies and reduce the hash of keys from 2 to 1. This improvement is useful in updating struct stored in dictionaries in high-performance scenarios.

For example:

Ref MyStruct value = CollectionsMarshal.GetValueRef (dictionary, key)

/ / return Unsafe.NullRef () if it does not exist

If (! Unsafe.IsNullRef (ref value))

{

/ / No need to copy, update on the spot

Value.MyInt++

}

Interface check and conversion performance improvement

The performance of interface conversion and checking whether a type implements an interface has been improved by 163.38%, which is especially useful for pattern matching.

Run time

.net 6 Preview 3 also includes more runtime improvements

Code generation optimization

Remove the boundary check after checking Length

Span boundary check ellipsis and top-level range check node removal

Add loop cloning support for byte array access

JIT: non-void ThrowHelpers

Floating point constant CSE

Enable CSE and loop invariant promotion optimization for immutable static read-only fields

Collapse more constant string null checks

Eliminate zero initialization of tracked temporary memory without GC fields

Dynamic PGO

Update the profile that returns the merge and tail call

Class profile: unknown placeholders can be used for the collection class typehandle

Keep the value type structure in the register

Complete the first part of the value type structure improvement: create more LCL_FLD

Improve the survivability of 'STORE_BLK (lcl_var)'

Complete .NET 6 exception handler write pass-through

Enabled by default in JIT

Put a single-defined exception handler into a register

718% performance improvement

.net hot and heavy load is initially available for Web applications

.net 6 Preview 3 enables initial support for ASP.NET Core and Blazor hot overloads. You only need to start the project through dotnet watch, but you need to modify Properties/launchSettings.json before you can use hot overloads:

For ASP.NET Core applications, add "hotReloadProfile": "aspnetcore"; for Blazor WebAssembly applications, add "hotReloadProfile": "blazorwasm".

Hot overloading can directly apply code updates without restarting the application and without losing the context and application state. This feature does not rely on Visual Studio, and you can hot reload even if you modify the code with notepad.

In addition, this is only the first step in the hot reload of .NET 6, which will be enabled for all other types of .NET application development.

At this point, I believe you have a deeper understanding of "what are the new features of .NET 6 Preview 3". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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