Title: Explore Running Tests in Parallel for Faster CI in litdata
Description:
We should investigate the possibility of running the test suite in parallel to speed up CI and local test execution. As the test base grows, serial execution becomes a bottleneck, especially when contributing frequently or iterating on PRs.
🧪 An initial test was conducted in #608.
Tasks:
Goal:
Improve test speed while maintaining test accuracy and reproducibility.