The Crystal Programming Language

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The Crystal Programming Language title: The Crystal Programming Language

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Crystal 1.21.0 is released!1 week

We are announcing a new Crystal release 1.21.0 with several new features and bug fixes.

Pre-built packages are available on GitHub Releases and our official distribution channels. See

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Releasing Execution Contexts2 weeks

Two and a half years ago, with the invaluable support from 84codes, we re-examined the multithreading model inherited from Crystal 0.28 (preview MT).

There are different ways to spread an application to multiple CPU cores. So far, preview MT proposed a simple solution, and it worke...

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Crystal 1.20.3 is released!2 weeks

We are announcing a new Crystal release 1.20.3 with fixes for two security vulnerabilities in the YAML parsers. We recommend upgrading as soon as possible if your application processes YAML files from unknown origins.

See the release notes of 1.20.0 for all the changes introduced in...

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