Programming and Software Development

Programming languages, frameworks, tools, DevOps, open source, and software engineering.

108 Articles

How GitHub Rewrote Copilot’s Runtime in Rust with the Help of Agents

GitHub explains the migration of the shared runtime for Copilot products from TypeScript and Node.js to more than 800,000 lines of Rust, through 128 pull requests and gradual replacements within the main branch. The experience reveals how AI agents were used to accelerate a project that would previously have required an entire team for one or two years.

2026-09-16

Programming and Software Development

Java 27 Arrives with Four Stable Features and Security and Performance Improvements

Java released version 27 on September 15, 2026, bringing nine JEP initiatives, including four stable features: adopting G1 as the default garbage collector in all environments, compact object headers, and a post-quantum-resistant hybrid key exchange. JetBrains confirmed IntelliJ IDEA support for the release from day one.

2026-09-15

Programming and Software Development

The .NET 11 Improvements Accumulate Performance Gains from JIT to Asynchronous Programming

Microsoft reviews hundreds of improvements in .NET 11, with a clear focus on the JIT compiler, reducing allocations, improving interface and delegate calls, and enhancing the internal structure of async/await. The published results show that the gains come from removing unnecessary checks, allocations, and calls, rather than from a single major change.

2026-09-15

Programming and Software Development

How to Gradually Integrate Rust to Speed Up an Existing Codebase Without Rewriting It Entirely

Lily Mara explains a methodology for restructuring functions through the Foreign Function Interface (FFI) to move specific parts of Python to Rust using PyO3, while preserving the existing application and reducing the risks of a wholesale rewrite. The experiment shows that function-level speedups can exceed 100 times, while the improvement in the overall HTTP test reached only about 15%, highlighting the importance of system-level measurement.

2026-09-15

Programming and Software Development

How the GitHub Team Turned Marketing Event Operations into a Software Workflow

GitHub shows how its team in Japan and South Korea used GitHub Issues, Issue Forms, Labels, and Actions with GitHub Copilot to automate the marketing event lifecycle from planning through follow-up. The central idea is to turn written procedures into executable workflows through tools that provide APIs or CLIs.

2026-09-11

Programming and Software Development

GitHub Explains to Beginners How to Review, Run, and Test Copilot Code from One Place

GitHub explains how to use diff panels, the terminal, and the browser within the GitHub Copilot app to review, run, and test changes created by the agent before accepting them. The guide suggests checking three essential points: what changed, whether the code works, and whether it actually performs the required function.

2026-09-10

Programming and Software Development

How to Use Unions and Closed Hierarchies in ASP.NET Core

The .NET Blog explains how to use union types and closed hierarchies with System.Text.Json through Minimal APIs, MVC, SignalR, Blazor, and OpenAPI. It also identifies ambiguous cases and binding sources that do not support these types.

2026-09-10

Programming and Software Development

Stack Overflow Relaunches Developer Story Feature and Lays the Groundwork for Building a Verified Technical Identity

Stack Overflow has relaunched Developer Story to present developers’ experience and contributions more broadly within their profiles. The platform says the feature forms the foundation for the vision of Stack Identity, while emphasizing that the launch is early and its functionality will continue to change.

2026-09-10

Programming and Software Development

How Did Microsoft Defender Slow Down the Startup of Rider and ReSharper?

JetBrains explains that scans performed by Microsoft Defender were adding tens of seconds to the first launch of Rider and ReSharper after ReSharper moved to an out-of-process architecture. In cooperation with Microsoft, Defender was improved, and JetBrains also released an open-source tool to measure the impact of scanning on development tools.

2026-09-09

Programming and Software Development

JetBrains Unifies Its Approach to Running WSL Projects Within Its Development Environments

JetBrains explains that support for WSL in IntelliJ IDEA, WebStorm, and PhpStorm is moving to a Native mode based on the IJent agent, rather than relying on the 9P layer or the Remote Development entry point as the primary option. The company says testing showed clear improvements when opening large projects and reading files, while Remote Development remains available but is no longer the recommended path.

2026-09-09

Programming and Software Development

Cloudflare Rebuilds the Workers Module Registry to Enhance Node.js Compatibility

Cloudflare redesigned the module registry in the Workers environment to use URLs and align more closely with Node.js behavior, with default support for stable Node.js APIs and an application limit increased to 64 MiB on all plans. The change is currently available through a compatibility flag and is not yet enabled automatically.

2026-09-09

Programming and Software Development

Microsoft Releases .NET 11 Release Candidate 1 with Broad Improvements for Developers

.NET 11 Release Candidate 1 is now available with updates spanning libraries, the runtime, and SDK through C# 15, ASP.NET Core, .NET MAUI, and Windows Forms. The release focuses on testing, deployment, and container tools, along with language and security features and improvements for different platforms.

2026-09-08

Programming and Software Development

How to Temporarily and Safely Bypass a 403 Response While Debugging Spring Security

JetBrains explains how to use Security inlays in IntelliJ IDEA to inspect endpoint protection requirements and temporarily bypass HTTP authorization during a debugging session, without modifying SecurityConfig or restarting the application. However, the feature opens the specified path to all clients able to access it, and it remains limited to Servlet applications and certain authentication types.

2026-09-08

Programming and Software Development

WebStorm 2026.2 Adds Stable TypeScript 7 Support for Angular and React Projects

JetBrains announced that WebStorm 2026.2.2 provides stable support for the new Go-based TypeScript 7 engine, with improvements in coding assistance speed for Angular and React projects without requiring project migration or a change to the TypeScript version used in the infrastructure.

2026-09-08

Programming and Software Development

JetBrains Opens the Early Access Program for Rider 2026.3 with Improvements to Debugging and Game Development

JetBrains has launched the first early access build of Rider 2026.3, adding nested bracket highlighting, data breakpoint configuration from the editor, and code completion filters, along with improvements for game developers and TUnit test coverage.

2026-09-07

Programming and Software Development

Microsoft Uses AI Agents to Accelerate WinUI App Development and Migrate Legacy Windows Apps

Microsoft is pushing to make creating WinUI 3 applications and migrating WPF and UWP applications easier through VS Code, GitHub Copilot, and WinUI Agent, with a promise of completing the initial workflow in about 30 minutes. However, reducing the cost of writing code does not automatically guarantee faster or less resource-intensive applications, a challenge that remains open for the company’s strategy.

2026-09-06

Programming and Software Development

How MSTest Tests .NET Applications Built with Native AOT Before Shipping

MSTest 4.4 enables test source generation and running tests as a native executable using Native AOT, bringing the test path closer to the application's actual deployment model. Microsoft recommends keeping managed tests and adding a limited Native AOT path in CI, with verification that the test count and results match.

2026-09-03

Programming and Software Development

How Do You Build Low-Cost Observability Tools for Large-Scale Systems?

Brian Martin of IOP Systems explains how operational measurement can be designed to preserve system visibility without turning the hot execution path into a bottleneck. His recommendations focus on atomic operations, per-CPU sharding, direct indexing, and accepting approximate consistency when it is better suited to performance.

2026-09-03