Haskell ghost knowledge; difficult to access, not written down

• superrecord

  2 82 0.0 Haskell

  Haskell: Supercharged anonymous records (by agrafix)

Cool. I added a few features (#30, #31) to superrecord that I needed in order to synthesise the record type from JSON at runtime, so I'd probably have to wait until those are ported to give it a try (unfortunately rather swamped at the moment so can't find the time to port those features myself right now).

• large-records

  2 41 5.9 Haskell

  Library to support efficient compilation of large records (linear in the number of record fields)

  

Also: maybe you already knew GHC.Generics instances had superlinear compilation time, but betcha you didn't know even normal records themselves had superlinear compilation time. At least I didn't know until Edsko's super-recent investigation (resulting in yet-unreleased https://github.com/well-typed/large-records)

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• post-rfc

  27 2,185 2.3

  Blog post previews in need of peer review

• rlua

  13 1,678 8.2 Rust

  High level Lua bindings to Rust

  

Idiomatic bindings to the Lua reference implementation are tricky: https://github.com/amethyst/rlua/issues/172#issuecomment-616975763

• cxx

  97 5,527 9.3 Rust

  Safe interop between Rust and C++

Interestingly, things get easier in some sense when you try to interoperate with C++, as more Rust features have an analogue there. See cxx and autocxx.

• hyper

  97 13,845 9.2 Rust

  An HTTP library for Rust (by hyperium)

  

Initial PR to expose a C API for hyper (for usage in a curl backend): https://github.com/hyperium/hyper/pull/2278

• amazonka

  7 589 9.5 Haskell

  A comprehensive Amazon Web Services SDK for Haskell.

amazonka is a bit of a minefield despite being listed as the only AWS library by SOTU

• SaaSHub

  www.saashub.com featured

  SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

  

• regex-tdfa

  1 36 4.6 Haskell

  Pure Haskell Tagged DFA Backend for "Text.Regex" (regex-base) (by haskell-hvr)

  

regex-tdfa, a very popular library, is buggy (e.g. here) despite claiming that "This regex-tdfa package implements, correctly, POSIX extended regular expressions [and your OS likely doesn't]"; its bugs very likely won't be fixed despite the fact that the library is still maintained

• bytestring

  15 283 7.9 Haskell

  An efficient compact, immutable byte string type (both strict and lazy) suitable for binary or 8-bit character data.

  

If you need fast Double rendering you can get a significant improvement by using double-conversion or the Ryu branch of bytestring. Again, you'd expect that "how to show a floating-point number quickly" would be a solved problem, but it's not.

• text-icu

  2 46 6.1 Haskell

  This package provides the Haskell Data.Text.ICU library, for performing complex manipulation of Unicode text.

  

text-icu occasionally breaks horribly and nondeterministically (1, 2) despite being praised by SOTU

• rust-bindgen

  50 4,131 9.0 Rust

  Automatically generates Rust FFI bindings to C (and some C++) libraries.

  

Yeah, it is certainly advisable to e.g. avoid setjmp/longjmp as in the Lua example above (this was the main reason for the release of Rust 1.24.1). But even for "Rust-aware" C, one has to write a lot of boilerplate. For example, with bindgen, the go-to tool to create bindings to C headers, one has to write (unsafe) wrapper functions which

• jrec

  1 35 3.2 Haskell

  Literally the best anonymous records

  

Try jrec. I threw away the sorting and it typechecks much faster now.

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