State of GHC

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Release notes and road map for GHC: 9.2 adds the GHC2021 flag, predictivity for polymorphism and record dot selection; 9.4 adds improved profiling with allocation-site residency graphs and late cost‑centre profiling, plugin extensions and many optimization wins; upcoming 9.6 previews levity polymorphism and unlifted/strict kinds, WebAssembly/JS backend work, delimited continuations, Hadrian builds, an error‑message index with stable codes and CI/devops improvements to speed compile and reduce regressions.

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" chapters (17)

1. 0:00Start
2. 11:20What Is the Difference between Stripless Annotations and Unlifted Types
3. 21:36Pointer Tagging
4. 23:38Kind Signature for Arrayhash
5. 30:22Improving Compile Time and Memory Timing
6. 31:15Error Messages
7. 32:30Webassembly
8. 32:44Challenges
9. 34:30Delimited Continuations
10. 42:01Does the Error Message Contain a Link to this Page
11. 45:50Optimization Improvements
12. 48:52The Ghc Proposal Process
13. 50:06Ghc Proposal
14. 51:09Which Proposals Were Accepted this Year
15. 1:09:37Alternate Releases
16. 1:13:33New Profiling Tools
17. 1:16:13Conditionals