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Simon Marlow @simonmar.bsky.social · 09/07/2025

There's so much I'd like to do. I've been hacking on the Haskell indexer to see if an index of (a large subset of) Hackage could be useful, see simonmar.github.io/posts/2025-0... The Angle compiler needs a lot of work, and I'd love to implement a JIT backend for the bytecode.

simonmar.github.io

Browsing Stackage with VS Code and Glean · Simon Marlow

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Simon Marlow @simonmar.bsky.social · 09/07/2025

Interesting, that isn't a problem I've run into. The main issue was the dependencies: fbthrift, folly, and RocksDB. A while ago I disentangled fbthrift, and recent Linux distros package a new enough version of RocksDB. Folly was the last one, see progress here github.com/facebookincu...

github.com

Support cabal install glean · Issue #553 · facebookincubator/Glean

Tracking progress towards cabal install glean so that others can test it The current state is on these branches: hsthrift: https://github.com/simonmar/hsthrift/tree/hackage-0.2.0.0 Glean: https://g...

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Simon Marlow @simonmar.bsky.social · 08/07/2025

Yep, hoping we can make it useful for non-Meta folks. And it's just fun to hack on.

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Simon Marlow @simonmar.bsky.social · 03/07/2025

Yes, dot is used by other languages and is therefore familiar to many people, but other languages don't also use dot for a different central concept. For Haskell we should have chosen another syntax. e.g. `->` would have been better IMO. it's way too late to do anything but rant, though.

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Simon Marlow @simonmar.bsky.social · 03/07/2025

On balance I think using dot for record selection in GHC (OverloadedRecordDot) was a mistake. Having dot be either function composition or record selection depending on whitespace is just not a good design, for either experienced or inexperienced users. 1/2

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Simon Marlow @simonmar.bsky.social · 22/05/2025

Blog post: Indexing Hackage: Glean vs. hiedb simonmar.github.io/posts/2025-0...

simonmar.github.io

Indexing Hackage: Glean vs. hiedb · Simon Marlow

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Simon Marlow @simonmar.bsky.social · 02/04/2025

Haha! I'd love to know which tidbits of advice have risen to this level, it might be useful if I'm reorganising things.

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Simon Marlow @simonmar.bsky.social · 29/03/2025

Perhaps a chapter on Thrift would be a more useful replacement for the distributed-process chapter.

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Simon Marlow @simonmar.bsky.social · 29/03/2025

Thanks, I'd forgotten about that post! How insightful 😆

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Simon Marlow @simonmar.bsky.social · 28/03/2025

I'm thinking about a second edition of Parallel and Concurrent Programming in Haskell. Any thoughts on what should be added (or removed)? What's missing, what updates are needed to reflect common usage? The obvious new things are async and Haxl. Should the chapter on distributed-process be kept?

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Simon Marlow @simonmar.bsky.social · 18/03/2025

Int is 64 bits almost everywhere these days

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Simon Marlow @simonmar.bsky.social · 01/03/2025

Probably not this time, but I'll be at Zurihac if you're coming to that?

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Simon Marlow @simonmar.bsky.social · 01/03/2025

Mainly riding my bike probably!

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Simon Marlow @simonmar.bsky.social · 28/02/2025

Congratulations Mary, enjoy retirement!

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Simon Marlow @simonmar.bsky.social · 28/02/2025

Yesterday I left Meta after 12 years. Freedom feels good!

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Simon Marlow @simonmar.bsky.social · 03/12/2024

My standard code review comment: looks like it needs more Control.Exception.bracket

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Simon Marlow @simonmar.bsky.social · 19/11/2024

If you have a bytecode interpreter and you want to make it faster, do you (a) JIT it using LLVM or (b) use Wasm or (c) something else? Given that LLVM is already a dependency (and dependencies matter), but you would like sandboxing/safety too.

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Simon Marlow @simonmar.bsky.social · 18/11/2024

How dare you, haggis is delicious

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Simon Marlow @simonmar.bsky.social · 17/11/2024

I sometimes get compliments on my laptop stickers in meetings. Especially the one in the middle, which I tracked down after seeing it on my daughter's laptop (and who now insists on getting credit for it, ergo)

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