Turbo Haskell (THC) is a JIT/AOT system that runs GHC Core on the JVM via Truffle and GraalVM, implementing the full set of GHC 9.14.1 prim-ops and delegating parsing, typechecking, desugaring and Core optimizations to GHC. It supports advanced Haskell features such as Template Haskell, Linear Haskell, Backpack and Cabal package resolution, and can produce native executables via GraalVM Native Image. THC already runs substantial codebases - pandoc, happy, alex and even GHC itself - and provides polyglot FFIs to Python, Ruby, R and JavaScript with zero-copy UTF-8 Text conversions; C/C++ is handled through Sulong (native- and managed-mode options).
The runtime exposes two Truffle backends (bytecode and AST), supports GHC-style concurrency primitives including throwTo, async exceptions and masking, and can use plain Java threads or Project Loom to provide lightweight green threads and cheap MVars via an HEC-style executor. SIMD is handled with runtime-selected vector “species” through the incubating Vector API, and hot tail calls are transformed into tight loops using tracing heuristics (a 64-bit Bloom filter), slow-path exceptions and Truffle/Graal loop transformations, with a stack-compaction trick inspired by CHICKEN Scheme. Performance after warmup ranges from roughly 3× faster to 3× slower versus GHC, typically 10-20% slower; recent development work introduced a ~10× regression on some benchmarks. Source and docs are on github.com/ekmett/thc and development happens on libera IRC.
Summary generated by AI from the linked article. hn.today is not affiliated with Hacker News or Y Combinator.
Yantra is an LALR(1) parser generator designed for C++ that helps developers create parsers efficiently. It is available as an open-source project on GitHub with ongoing development and community support. (github.com)
Jevotron is a command-line tool for integrating multiple Jev workflows, enabling anomaly detection and data assessment across various file formats. It offers features like preview, scoring, review, and caching to streamline data analysis and review processes. (cmungall.github.io)
EDG C++ Compiler has been released as open source on GitHub, allowing developers to access and contribute to its codebase. The project includes extensive commits, files, and development activity. (github.com)
PLDB catalogs over 33,000 programming languages papers from 1973 to 2026, covering top venues like POPL, PLDI, and ICFP. It allows searching by topics such as concurrency, effect handlers, and ownership types. (pldb.kirancodes.me)
Perspica is a tool that provides a semantic diff for reviewing code changes. It aims to improve code review accuracy by analyzing the meaning of code differences. (github.com)
Halfspace is an experimental IDE for solid modeling using distance fields, allowing real-time rasterization and mesh export. It aims to simplify working with implicit surfaces by providing both a shape library and tools for incremental model building. (mattkeeter.com)
Today's best Hacker News stories, summarized and screenshotted, one email a day.