Jared Hester cloudRoutine

F# Advent 2021 Dec 08 - Fast data pipelines with F#6

Thanks to Sergey Tihon for running F# Weekly and F# Advent.

Thanks to manofstick for trying out the code and coming with invaluable feedback. Cistern.ValueLinq is very impressive.

TLDR; F#6 enables data pipelines with up to 15x less overhead than LINQ

There were many interesting improvements in F#6 but one in particular caught my eye, the attribute InlineIfLambda.

F# Advent 2016 (English) - December 10 - Implementing a persistent hash map.

This blog created for F# Advent 2016 (English)

Full source code can be found here

Changelog

2016-12-10
New performance test - Anthony Lloyd (@AnthonyLloyd) suggested that I compare against Prime.Vmap.

Optimizing a simple problem

I was introduced to a simple optimization problem by one of my interns last week. He was about to participate in a friendly competition where they were asked to find a performant solution to the problem:

The problem

JSON Monadic Transformers

Full source at: https://gist.github.com/mrange/7c39333de480a8de5c812a1f6ba70173

A popular approach in Functional Languages to create parsers is to use parser combinators.

Parser combinators provide a way to compose parser of ever increasing complexity from simple parsers. Parser combinators

	open System.Diagnostics
	open System.Reflection
	open Microsoft.FSharp.Core
	open Microsoft.FSharp.Core.Operators
	open Microsoft.FSharp.Core.LanguagePrimitives
	open Microsoft.FSharp.Core.LanguagePrimitives.IntrinsicOperators
	open Microsoft.FSharp.Collections
	open Microsoft.FSharp.Primitives.Basics
	open System.Collections.Generic

	[<System.Runtime.CompilerServices.Extension>]
	type ExtensionMethods() =
	[<System.Runtime.CompilerServices.Extension>]
	static member inline GetOption< ^a,'k,'v when 'a : (member TryGetValue : 'k * ('v byref) -> bool)>(this : ^a, key : 'k) =
	let mutable v = Unchecked.defaultof<'v>
	let scc = ( ^a : (member TryGetValue : 'k * ('v byref) -> bool) this, key, &v)
	if scc then
	Some v
	else
	None

	Capability Red - Requirements at Scale by Liz Keogh
	http://www.ndcvideos.com/#/app/video/2111
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	The Ultimate Logging Architecture - You KNOW You Want It by Michele Leroux Bustamante