Cooperative Concurrency in Crystal with Fibers and Channels
Crystal schedules lightweight fibers cooperatively on a single OS thread. Learn how to pass messages between fibers with Channel(T) and avoid stalling the scheduler.
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crystalCrystal's Compile-Time Nilable Types: Catching Null Errors Before They Ship
Crystal's ? suffix makes nilability part of the type system, turning null-reference crashes into compile-time errors. Control-flow refinement narrows types after nil checks, and &. handles optional values inline. Trade-off: nilables spread through generics, increasing verbosity.
Crystal Type Inference: Static Safety Without Constant Annotations
Crystal feels like Ruby but compiles to native code. Learn how its type inference works, where annotations are required, and how to read compiler errors.
Designing Concurrent I/O Services with Crystal Fibers and Channels
Learn how to implement a high-concurrency I/O service using Crystal's cooperative fibers and channels, including strategies to avoid scheduler stalls and memory leaks.
Balancing Productivity and Performance with Crystal's Type Inference
Explore how Crystal's type inference engine provides the speed of a compiled language with the clean syntax of Ruby, and learn the trade-offs regarding compilation time.
Choosing a Nil‑Handling Strategy in Crystal: A Decision Guide
A decision guide for handling nilable values in Crystal: compare .try, .not_nil!, explicit guards, case expressions, and the stdlib try macro with a compact trade‑off table and a runnable demo.
Process.spawn environment inheritance behavior unspecified in Crystal
Environment variable propagation gap Crystal's Process.spawn API accepts an optional env hash to define the child process environment, yet the documentation does not state whether the parent's environment is inherited when env is omitted. Empirical testing shows that variables set in the parent are absent in the spawned process unless explicitly forwarded. I
Crystal fiber cancellation limits under cooperative scheduling
Designing graceful cancellation and timeouts for long-running work in Crystal requires understanding the documented limits of fiber cooperation and select-based waiting. Fibers are cooperative and scheduled by the runtime. Cancellation does not preempt a running fiber; a fiber must reach a yield point to observe a cancellation signal. Timeouts are typically