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Tag: performance

69 posts · Page 4 of 7

2026-06-06 migration csharp dotnet

Migrate from ValueTask<T> back to Task<T>: when and why (.NET 11, C# 14)

A practical checklist for reverting ValueTask and ValueTask<T> return types to Task and Task<T>, what breaks at the call sites, how to verify each change, and how to know whether the swap was ever worth it.

2026-06-04 comparison ef-core ef-core-11

EF Core ExecuteUpdate vs loading entities and SaveChanges: which should you use?

A decision guide and real benchmark for EF Core 11: use ExecuteUpdate for set-based writes by a predicate, and the load-then-SaveChanges path only when you need the change tracker, interceptors, or a complex object graph.

2026-06-03 dotnet performance native-aot

.NET 11 Raises the Minimum CPU Baseline to x86-64-v2

.NET 11 Preview 4 drops support for pre-2013 x86/x64 chips and bumps the JIT baseline to x86-64-v2. Here is what breaks, why, and how to check your hardware before you upgrade.

2026-06-02 dotnet-11 csharp performance

.NET 11 Can Round-Trip a Double as Hex, Bit for Bit

.NET 11 Preview 4 teaches double, float, and Half to format with the X specifier and parse with NumberStyles.HexFloat, producing the same IEEE-754 hex text as C printf("%a").

2026-06-01 ef-core ef-core-11 csharp

How to use query splitting to avoid a cartesian explosion in EF Core 11

When you Include two sibling collections, EF Core 11 returns the cross product and your row count explodes. Here is how AsSplitQuery fixes it, how to turn it on globally, and the consistency and ordering gotchas to watch for.

2026-05-31 ef-core ef-core-11 csharp

How to use ExecuteUpdate and ExecuteDelete for bulk writes in EF Core 11

A complete guide to ExecuteUpdate and ExecuteDelete in EF Core 11: the SQL they emit, the change-tracker gotcha that silently overwrites your bulk write, transactions, concurrency control with the affected-row count, and the EF Core 10 delegate setters that let you build conditional updates with plain if statements.

2026-05-25 comparison csharp dotnet

List<T> vs Span<T> vs ReadOnlySpan<T> in C#: when to reach for which

List<T> is a growable heap collection; Span<T> and ReadOnlySpan<T> are stack-only views over memory you already own. Use List<T> for anything you store, return from async, or grow; Span<T> for a mutable allocation-free view in a synchronous method; ReadOnlySpan<T> for read-only parsing over strings, u8 literals, and slices.

2026-05-25 comparison csharp dotnet

Parallel.ForEach vs Parallel.ForEachAsync vs Task.WhenAll in C#

Use Parallel.ForEach for CPU-bound work over in-memory data, Parallel.ForEachAsync for async I/O over many items with a concurrency cap, and Task.WhenAll for a small fixed fan-out where you want every operation in flight and need the results back.

2026-05-25 comparison csharp dotnet

StringBuilder vs string interpolation in .NET 11: which should you use?

Use string interpolation for one-shot composition of a fixed set of values; use StringBuilder when you append in a loop or across an unknown number of pieces. The dividing line is the loop, not the number of values.

2026-05-23 dotnet-11 csharp performance

.NET 11 Adds Allocation-Free Deflate and GZip Compression

.NET 11 Preview 4 ships DeflateEncoder, GZipEncoder, and ZLibEncoder plus matching decoders so you can compress straight into a Span<byte> with OperationStatus, no Stream required.