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· 5 min read
Danny Berkelaar

We're excited to announce StrykerJS 6.4. This release comes with some bug fixes, but in this article, we will focus on upgraded TypeScript Checker.

As a reminder, the TypeScript checker is an optional StrykerJS plugin. When configured, each mutant will first be validated to not result in compile errors when run through the TypeScript compiler.

The performance of this process has been an issue for quite some time now. In the past, enabling this plugin might have resulted in up to a 10x performance degradation. But there is excellent news, version 6.4 of the Typescript checker improves the performance by up to 50%