Tips from NDC Oslo 2019 - F# Interactive- #time

During the workshop I followed I learned the following handy directive #time that can be used in F# Interactive.

Executing the #time directive will enable basic profiling.

Let’s try the code below in F# interactive(FSI):

	#time
	let strings = [\| "Machine"; "Learning"; "with"; "F#"; "is"; "fun" \|]

	// We can transform it into a new array,
	// containing the length of each string:
	let lengths = Array.map (fun (s:string) -> s.Length) strings

view raw #time.fsx hosted with ❤ by GitHub

This will produce the following output:

--> Timing now on

Real: 00:00:00.000, CPU: 00:00:00.000, GC gen0: 0, gen1: 0, gen2: 0
val strings : string [] = [|"Machine"; "Learning"; "with"; "F#"; "is"; "fun"|]
val lengths : int [] = [|7; 8; 4; 2; 2; 3|]

>

We get the real time and CPU time, as well as some information about garbage collection in generations 0, 1 and 2.

To disable it again you can execute the #time directive another time.

Kubernetes–Limit your environmental impact

Reducing the carbon footprint and CO2 emission of our (cloud) workloads, is a responsibility of all of us. If you are running a Kubernetes cluster, have a look at Kube-Green . kube-green is a simple Kubernetes operator that automatically shuts down (some of) your pods when you don't need them. A single pod produces about 11 Kg CO2eq per year( here the calculation). Reason enough to give it a try! Installing kube-green in your cluster The easiest way to install the operator in your cluster is through kubectl. We first need to install a cert-manager: kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.14.5/cert-manager.yaml Remark: Wait a minute before you continue as it can take some time before the cert-manager is up & running inside your cluster. Now we can install the kube-green operator: kubectl apply -f https://github.com/kube-green/kube-green/releases/latest/download/kube-green.yaml Now in the namespace where we want t...

Azure DevOps/ GitHub emoji

I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.

.NET 9 - Goodbye sln!

Although the csproj file evolved and simplified a lot over time, the Visual Studio solution file (.sln) remained an ugly file format full of magic GUIDs. With the latest .NET 9 SDK(9.0.200), we finally got an alternative; a new XML-based solution file(.slnx) got introduced in preview. So say goodbye to this ugly sln file: And meet his better looking slnx brother instead: To use this feature we first have to enable it: Go to Tools -> Options -> Environment -> Preview Features Check the checkbox next to Use Solution File Persistence Model Now we can migrate an existing sln file to slnx using the following command: dotnet sln migrate AICalculator.sln .slnx file D:\Projects\Test\AICalculator\AICalculator.slnx generated. Or create a new Visual Studio solution using the slnx format: dotnet new sln --format slnx The template "Solution File" was created successfully. The new format is not yet recognized by VSCode but it does work in Jetbr...

The art of simplicity

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