Microsoft is Rewriting TypeScript – But Not How You Think

Microsoft has just announced a major shift in how TypeScript is built, and it’s taking many developers by surprise. Instead of simply optimizing the current implementation, they’re completely rewriting the TypeScript compiler. But here’s the real shocker: they’re doing it in Go a programming language developed by Google!

Why is Microsoft Rewriting TypeScript?

TypeScript has become an essential tool for modern web development, helping developers write safer and more scalable JavaScript. However, there has been one persistent challenge: the TypeScript compiler itself. Since it’s written in TypeScript, it tends to be slow, especially on large projects. Developers have long requested better performance and efficiency, and Microsoft has listened.

To keep up with the growing demands of web development, Microsoft decided to rebuild the TypeScript compiler from the ground up. This rewrite aims to dramatically improve speed and efficiency while maintaining compatibility with existing TypeScript code.

Why Choose Go Instead of C++ or Rust?

Many expected Microsoft to choose C++ or Rust for this major rewrite, given their reputation for speed and efficiency. However, Microsoft went in a different direction—Go. Here’s why:

• Faster Execution – Go is a compiled language, unlike JavaScript, which means the new compiler will run much faster.

• Simplified Memory Management – Go’s automatic garbage collection reduces the complexity of handling memory compared to C++ or Rust.

• Cross-Platform Compatibility – Go makes it easy to run the compiler on multiple operating systems without major modifications.

• Easier Maintenance – Go’s simple and clean syntax allows for easier updates and long-term maintainability.

What This Means for Developers

If you use TypeScript, this rewrite could significantly improve your development experience. Microsoft has already tested the new Go-powered compiler, and the results are astounding. It’s reportedly 10 times faster than the current compiler. For example, compiling a large project in VS Code that used to take 70 seconds now completes in just 7 seconds!

For developers, this means:

• Faster compilation times, even for large-scale projects

• A more efficient development workflow

• No need to change existing TypeScript code just enjoy better performance

When Will the New Compiler Be Available?

Currently, TypeScript is at version 5.8, but the Go-powered compiler is expected to debut in TypeScript 7. This means developers might have to wait several months or even longer before they can fully benefit from the improvements.

Final Thoughts

Microsoft’s decision to rewrite the TypeScript compiler in Go is a bold move. Instead of sticking with its own language, like C#, Microsoft chose the best tool for the job. The result? A faster, more efficient TypeScript experience for developers worldwide.