⚡️ Fable 5.25.0 is out!
14 perf improvements for JS/TS:
• Union hash 36 → 5 ns, 0 alloc
• Dictionary lookup 39 → 30 ns, 0 alloc
• Record hash 15-20% faster
• List ops 15-30% faster
Contributors aligned behavior with .NET. Thanks goswinr, Leo Conforti, cabboose!
#fsharp #fablecompiler
14 perf improvements for JS/TS:
• Union hash 36 → 5 ns, 0 alloc
• Dictionary lookup 39 → 30 ns, 0 alloc
• Record hash 15-20% faster
• List ops 15-30% faster
Contributors aligned behavior with .NET. Thanks goswinr, Leo Conforti, cabboose!
#fsharp #fablecompiler
October 29, 2026 at 7:02 PM
⚡️ Fable 5.25.0 is out!
14 perf improvements for JS/TS:
• Union hash 36 → 5 ns, 0 alloc
• Dictionary lookup 39 → 30 ns, 0 alloc
• Record hash 15-20% faster
• List ops 15-30% faster
Contributors aligned behavior with .NET. Thanks goswinr, Leo Conforti, cabboose!
#fsharp #fablecompiler
14 perf improvements for JS/TS:
• Union hash 36 → 5 ns, 0 alloc
• Dictionary lookup 39 → 30 ns, 0 alloc
• Record hash 15-20% faster
• List ops 15-30% faster
Contributors aligned behavior with .NET. Thanks goswinr, Leo Conforti, cabboose!
#fsharp #fablecompiler
🚀 Free speedups for JS/TS in the next Fable release:
- List operations: up to 3x faster
- Map lookups: ~1.7x faster
Zero code changes needed.
#fsharp #fablecompiler
- List operations: up to 3x faster
- Map lookups: ~1.7x faster
Zero code changes needed.
#fsharp #fablecompiler
October 27, 2026 at 10:55 AM
🚀 Free speedups for JS/TS in the next Fable release:
- List operations: up to 3x faster
- Map lookups: ~1.7x faster
Zero code changes needed.
#fsharp #fablecompiler
- List operations: up to 3x faster
- Map lookups: ~1.7x faster
Zero code changes needed.
#fsharp #fablecompiler
Fable 5.22 is out. Since 5.16:
- Opt-in Temporal dates / times for JS
- Implicit conversion to U2..U9
- Cold builds: project cracking 7.7s to 2.3s 🏎️
- Compilation up to 2.9x faster (server GC + JIT tuning) 🎉
- Faster watch: incremental inline exprs
- Many BEAM and Rust fixes
#fsharp #fablecompiler
- Opt-in Temporal dates / times for JS
- Implicit conversion to U2..U9
- Cold builds: project cracking 7.7s to 2.3s 🏎️
- Compilation up to 2.9x faster (server GC + JIT tuning) 🎉
- Faster watch: incremental inline exprs
- Many BEAM and Rust fixes
#fsharp #fablecompiler
October 20, 2026 at 9:11 AM
Fable 5.22 is out. Since 5.16:
- Opt-in Temporal dates / times for JS
- Implicit conversion to U2..U9
- Cold builds: project cracking 7.7s to 2.3s 🏎️
- Compilation up to 2.9x faster (server GC + JIT tuning) 🎉
- Faster watch: incremental inline exprs
- Many BEAM and Rust fixes
#fsharp #fablecompiler
- Opt-in Temporal dates / times for JS
- Implicit conversion to U2..U9
- Cold builds: project cracking 7.7s to 2.3s 🏎️
- Compilation up to 2.9x faster (server GC + JIT tuning) 🎉
- Faster watch: incremental inline exprs
- Many BEAM and Rust fixes
#fsharp #fablecompiler
For #fsharp, #dotnet, #fablecompiler and
@cloudflare-dev.bsky.social folks there's a new project for building agentic AI in the cloud. We're excited to make this a community project that anyone can use, modify, profit and contribute! It's still early days yet... fsprojects.github.io/FSharp.Cloud...
@cloudflare-dev.bsky.social folks there's a new project for building agentic AI in the cloud. We're excited to make this a community project that anyone can use, modify, profit and contribute! It's still early days yet... fsprojects.github.io/FSharp.Cloud...
FSharp.CloudEdge
Build web products on Cloudflare with F#.
fsprojects.github.io
September 30, 2026 at 12:26 PM
For #fsharp, #dotnet, #fablecompiler and
@cloudflare-dev.bsky.social folks there's a new project for building agentic AI in the cloud. We're excited to make this a community project that anyone can use, modify, profit and contribute! It's still early days yet... fsprojects.github.io/FSharp.Cloud...
@cloudflare-dev.bsky.social folks there's a new project for building agentic AI in the cloud. We're excited to make this a community project that anyone can use, modify, profit and contribute! It's still early days yet... fsprojects.github.io/FSharp.Cloud...
I often find myself reviewing code more often that writing. This #vscode plugin analyzes your code and gives you visual feedback, and actionable suggestions to you and your coding agent on code complexity. Written in F#/Fable #fablecompiler #fsharp #python #typescript #kotlin #cplusplus
Energy State Analyzer - Visual Studio Marketplace
Extension for Visual Studio Code - Visualize code energy states in real-time (Python, F#, TypeScript, Kotlin, C++)
marketplace.visualstudio.com
September 6, 2026 at 11:58 AM
I often find myself reviewing code more often that writing. This #vscode plugin analyzes your code and gives you visual feedback, and actionable suggestions to you and your coding agent on code complexity. Written in F#/Fable #fablecompiler #fsharp #python #typescript #kotlin #cplusplus
Fable 5.14.0, 5.15.0, and 5.16.0 have been released over the past few days! 🚀
These updates feature:
- Improved support for Python, Rust, and Beam.
- Added support for precompiled libraries in fable-standalone (stay tuned for a surprise coming in the next few days!).
#fsharp #fablecompiler
These updates feature:
- Improved support for Python, Rust, and Beam.
- Added support for precompiled libraries in fable-standalone (stay tuned for a surprise coming in the next few days!).
#fsharp #fablecompiler
September 3, 2026 at 9:59 PM
Fable 5.14.0, 5.15.0, and 5.16.0 have been released over the past few days! 🚀
These updates feature:
- Improved support for Python, Rust, and Beam.
- Added support for precompiled libraries in fable-standalone (stay tuned for a surprise coming in the next few days!).
#fsharp #fablecompiler
These updates feature:
- Improved support for Python, Rust, and Beam.
- Added support for precompiled libraries in fable-standalone (stay tuned for a surprise coming in the next few days!).
#fsharp #fablecompiler
This thing is too tempting...
I guess I can deviate the rest of the week from my current game dev stuff to make this shippable... I guess I'll be joining the Three.js demos this week
github.com/AngelMunoz/M...
github.com/AngelMunoz/M...
github.com/AngelMunoz/M...
#dotnet #fsharp #fablecompiler
I guess I can deviate the rest of the week from my current game dev stuff to make this shippable... I guess I'll be joining the Three.js demos this week
github.com/AngelMunoz/M...
github.com/AngelMunoz/M...
github.com/AngelMunoz/M...
#dotnet #fsharp #fablecompiler
Mibo.Fable/demo/Main.fs at main · AngelMunoz/Mibo.Fable
Contribute to AngelMunoz/Mibo.Fable development by creating an account on GitHub.
github.com
September 3, 2026 at 4:07 AM
This thing is too tempting...
I guess I can deviate the rest of the week from my current game dev stuff to make this shippable... I guess I'll be joining the Three.js demos this week
github.com/AngelMunoz/M...
github.com/AngelMunoz/M...
github.com/AngelMunoz/M...
#dotnet #fsharp #fablecompiler
I guess I can deviate the rest of the week from my current game dev stuff to make this shippable... I guess I'll be joining the Three.js demos this week
github.com/AngelMunoz/M...
github.com/AngelMunoz/M...
github.com/AngelMunoz/M...
#dotnet #fsharp #fablecompiler
September 1, 2026 at 11:04 PM
Looks like I got sniped into working on a #fablecompiler version of Mibo.Core (headless runner mainly) this would enable adding backends such as threejs/babylonjs/phaser and others.
Run the simulation headless from your F#->JS code and let the guys that know how to paint, paint
Run the simulation headless from your F#->JS code and let the guys that know how to paint, paint
September 1, 2026 at 6:47 PM
Looks like I got sniped into working on a #fablecompiler version of Mibo.Core (headless runner mainly) this would enable adding backends such as threejs/babylonjs/phaser and others.
Run the simulation headless from your F#->JS code and let the guys that know how to paint, paint
Run the simulation headless from your F#->JS code and let the guys that know how to paint, paint
Dependabot doesn’t support Paket projects, so I made PaketaBot. It runs in GitHub Actions and needs no hosted service. Written in F# and compiled with Fable github.com/cardamomcode... #fsharp #fablecompiler
GitHub - cardamomcode/paketabot: The dependency bot that speaks Paket.
The dependency bot that speaks Paket. Contribute to cardamomcode/paketabot development by creating an account on GitHub.
github.com
August 13, 2026 at 4:57 PM
Dependabot doesn’t support Paket projects, so I made PaketaBot. It runs in GitHub Actions and needs no hosted service. Written in F# and compiled with Fable github.com/cardamomcode... #fsharp #fablecompiler
TypeScript aside, these languages can officially transpile to deployable #JavaScript:
❎ #fsharp (way to go @FableCompiler!)
❎ @Kotlin (there's even a JS subset of kotlin-stdlib with Promises etc)
❎@dart_lang (with dart2js)
❌#csharp 🙄
❎ #fsharp (way to go @FableCompiler!)
❎ @Kotlin (there's even a JS subset of kotlin-stdlib with Promises etc)
❎@dart_lang (with dart2js)
❌#csharp 🙄
November 18, 2024 at 7:32 PM
TypeScript aside, these languages can officially transpile to deployable #JavaScript:
❎ #fsharp (way to go @FableCompiler!)
❎ @Kotlin (there's even a JS subset of kotlin-stdlib with Promises etc)
❎@dart_lang (with dart2js)
❌#csharp 🙄
❎ #fsharp (way to go @FableCompiler!)
❎ @Kotlin (there's even a JS subset of kotlin-stdlib with Promises etc)
❎@dart_lang (with dart2js)
❌#csharp 🙄
March 29, 2025 at 7:10 PM
We welcome @compositionalit.bsky.social to Bluesky!
Compositional IT post excellent high quality material about F# and other development topics. Please give them a follow!
#fsharp #fablecompiler
Compositional IT post excellent high quality material about F# and other development topics. Please give them a follow!
#fsharp #fablecompiler
January 17, 2025 at 3:36 PM
We welcome @compositionalit.bsky.social to Bluesky!
Compositional IT post excellent high quality material about F# and other development topics. Please give them a follow!
#fsharp #fablecompiler
Compositional IT post excellent high quality material about F# and other development topics. Please give them a follow!
#fsharp #fablecompiler
Welcome FSharp.Collections.Builders to the fsprojects collective!
An incredible little library!
"Computation expressions for conveniently and efficiently constructing common collections."
github.com/fsprojects/F...
#fsharp #fablecompiler
An incredible little library!
"Computation expressions for conveniently and efficiently constructing common collections."
github.com/fsprojects/F...
#fsharp #fablecompiler
GitHub - fsprojects/FSharp.Collections.Builders: Computation expressions for conveniently and efficiently constructing common collections.
Computation expressions for conveniently and efficiently constructing common collections. - fsprojects/FSharp.Collections.Builders
github.com
January 5, 2025 at 6:31 PM
Welcome FSharp.Collections.Builders to the fsprojects collective!
An incredible little library!
"Computation expressions for conveniently and efficiently constructing common collections."
github.com/fsprojects/F...
#fsharp #fablecompiler
An incredible little library!
"Computation expressions for conveniently and efficiently constructing common collections."
github.com/fsprojects/F...
#fsharp #fablecompiler
You are amazing Sergey! Thank you for this highlight of the F# Community year!
#fsharp #fablecompiler
#fsharp #fablecompiler
With this last post from Damian, our F# Advent Calendar 2024 is functionally complete 💯 #fsharp #FsAdvent sergeytihon.com/2024/10/26/f...
January 5, 2025 at 4:37 PM
You are amazing Sergey! Thank you for this highlight of the F# Community year!
#fsharp #fablecompiler
#fsharp #fablecompiler
Welcome FSharp.MongoDB to the github.com/fsprojects/ collective!
fsprojects is a space for the F# community to incubate and grow their libraries and technologies together. Please join and contribute #fsharp #fablecompiler
fsprojects is a space for the F# community to incubate and grow their libraries and technologies together. Please join and contribute #fsharp #fablecompiler
January 5, 2025 at 4:35 PM
Welcome FSharp.MongoDB to the github.com/fsprojects/ collective!
fsprojects is a space for the F# community to incubate and grow their libraries and technologies together. Please join and contribute #fsharp #fablecompiler
fsprojects is a space for the F# community to incubate and grow their libraries and technologies together. Please join and contribute #fsharp #fablecompiler
A Merry Christmas and Happy Holidays to all F# and Fable users across the world!
F# welcomes everyone interested in succinct, correct and performant coding, based on data, functions and types. The eternal sweetspot of programming!
#fsharp #fablecompiler
F# welcomes everyone interested in succinct, correct and performant coding, based on data, functions and types. The eternal sweetspot of programming!
#fsharp #fablecompiler
December 25, 2024 at 9:50 PM
A Merry Christmas and Happy Holidays to all F# and Fable users across the world!
F# welcomes everyone interested in succinct, correct and performant coding, based on data, functions and types. The eternal sweetspot of programming!
#fsharp #fablecompiler
F# welcomes everyone interested in succinct, correct and performant coding, based on data, functions and types. The eternal sweetspot of programming!
#fsharp #fablecompiler
November 30, 2024 at 10:40 AM
Friday at 1400 UTC (in 4 hours), join the call with @amplifyingfsharp.io to discuss
🎉What's New in F# 9🎉
amplifyingfsharp.io/sessions/202...
#fsharp #fablecompiler
🎉What's New in F# 9🎉
amplifyingfsharp.io/sessions/202...
#fsharp #fablecompiler
amplifyingfsharp.io
November 14, 2024 at 10:09 AM
Friday at 1400 UTC (in 4 hours), join the call with @amplifyingfsharp.io to discuss
🎉What's New in F# 9🎉
amplifyingfsharp.io/sessions/202...
#fsharp #fablecompiler
🎉What's New in F# 9🎉
amplifyingfsharp.io/sessions/202...
#fsharp #fablecompiler
🚀 Fable 5.7.0 is officially live! 🎉
This release brings massive performance upgrades under the hood for Python:
- DU pattern matching: 6-10x speed up! 🏎️
- Sequences: 1.6x faster!
#fsharp #fablecompiler
This release brings massive performance upgrades under the hood for Python:
- DU pattern matching: 6-10x speed up! 🏎️
- Sequences: 1.6x faster!
#fsharp #fablecompiler
July 10, 2026 at 3:17 PM
🚀 Fable 5.7.0 is officially live! 🎉
This release brings massive performance upgrades under the hood for Python:
- DU pattern matching: 6-10x speed up! 🏎️
- Sequences: 1.6x faster!
#fsharp #fablecompiler
This release brings massive performance upgrades under the hood for Python:
- DU pattern matching: 6-10x speed up! 🏎️
- Sequences: 1.6x faster!
#fsharp #fablecompiler
Fable 5.6 is officially here! 🚀
📁 Expanded System.IO API support (Path and Directory) for JS & Python.
🤖 100% automated release process achieved for the first time!
#fsharp #fablecompiler
📁 Expanded System.IO API support (Path and Directory) for JS & Python.
🤖 100% automated release process achieved for the first time!
#fsharp #fablecompiler
July 6, 2026 at 8:33 AM
Fable 5.6 is officially here! 🚀
📁 Expanded System.IO API support (Path and Directory) for JS & Python.
🤖 100% automated release process achieved for the first time!
#fsharp #fablecompiler
📁 Expanded System.IO API support (Path and Directory) for JS & Python.
🤖 100% automated release process achieved for the first time!
#fsharp #fablecompiler
Fable 5.5 is out 🎉
This release have a strong focus on fixing bug for JavaScript/TypeScript targets.
It is also trying to make writing cross-target code easier. Thanks to `Compiler.is*` target detection as an alternative to compiler directives.
github.com/fable-compil...
#fsharp #fablecompiler
This release have a strong focus on fixing bug for JavaScript/TypeScript targets.
It is also trying to make writing cross-target code easier. Thanks to `Compiler.is*` target detection as an alternative to compiler directives.
github.com/fable-compil...
#fsharp #fablecompiler
Release 5.5.0 · fable-compiler/Fable
🚀 Features
(all) Add Compiler.is* target detection flags for conditional branching (#4692) (621dea31)
(js/ts) Map task { } to Promise (97f54d36)
(js/ts/python/beam) Add support for Async.AwaitEven...
github.com
July 1, 2026 at 9:32 AM
Fable 5.5 is out 🎉
This release have a strong focus on fixing bug for JavaScript/TypeScript targets.
It is also trying to make writing cross-target code easier. Thanks to `Compiler.is*` target detection as an alternative to compiler directives.
github.com/fable-compil...
#fsharp #fablecompiler
This release have a strong focus on fixing bug for JavaScript/TypeScript targets.
It is also trying to make writing cross-target code easier. Thanks to `Compiler.is*` target detection as an alternative to compiler directives.
github.com/fable-compil...
#fsharp #fablecompiler
What's better than Fable 5?
Fable 5.1 and 5.2! 🎉 (And yes, I totally forgot to announce 5.1).
Both releases bring plenty of fixes across various targets. Check out the release notes for details:
github.com/fable-compil...
#fsharp #fablecompiler
Fable 5.1 and 5.2! 🎉 (And yes, I totally forgot to announce 5.1).
Both releases bring plenty of fixes across various targets. Check out the release notes for details:
github.com/fable-compil...
#fsharp #fablecompiler
Releases · fable-compiler/Fable
F# to JavaScript, TypeScript, Python, Rust, Erlang and Dart Compiler - fable-compiler/Fable
github.com
June 11, 2026 at 8:43 PM
What's better than Fable 5?
Fable 5.1 and 5.2! 🎉 (And yes, I totally forgot to announce 5.1).
Both releases bring plenty of fixes across various targets. Check out the release notes for details:
github.com/fable-compil...
#fsharp #fablecompiler
Fable 5.1 and 5.2! 🎉 (And yes, I totally forgot to announce 5.1).
Both releases bring plenty of fixes across various targets. Check out the release notes for details:
github.com/fable-compil...
#fsharp #fablecompiler
A new test framework joining the F# ecosystem: Scriptorium.
It is designed from the ground up as a cross-target testing framework, seamlessly supporting both F# .NET and Fable compilation targets (JavaScript only at the time of writing)
fable-hub.github.io/Scriptorium/
#fsharp #fablecompiler
It is designed from the ground up as a cross-target testing framework, seamlessly supporting both F# .NET and Fable compilation targets (JavaScript only at the time of writing)
fable-hub.github.io/Scriptorium/
#fsharp #fablecompiler
Scriptorium
fable-hub.github.io
May 18, 2026 at 1:45 PM
A new test framework joining the F# ecosystem: Scriptorium.
It is designed from the ground up as a cross-target testing framework, seamlessly supporting both F# .NET and Fable compilation targets (JavaScript only at the time of writing)
fable-hub.github.io/Scriptorium/
#fsharp #fablecompiler
It is designed from the ground up as a cross-target testing framework, seamlessly supporting both F# .NET and Fable compilation targets (JavaScript only at the time of writing)
fable-hub.github.io/Scriptorium/
#fsharp #fablecompiler