valhalla
SharpLab
valhalla | SharpLab | |
---|---|---|
8 | 106 | |
493 | 2,575 | |
1.2% | - | |
9.9 | 7.8 | |
4 days ago | 5 months ago | |
Java | C# | |
GNU General Public License v3.0 only | BSD 2-clause "Simplified" License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
valhalla
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Overhead of Returning Optional Values in Java and Rust
I reran the benchmarks with the latest Valhalla branch [1] and added a test that used OptionalLong instead of Optional.
Without Valhalla
OptionBenchmark.sumSimple avgt 5 328,110 us/op
OptionBenchmark.sumNulls avgt 5 570,800 us/op
OptionBenchmark.sumOptional avgt 5 2223,887 us/op
OptionBenchmark.sumOptionalLong avgt 5 1201,987 us/op
With Valhalla
OptionBenchmark.sumSimpleValhalla avgt 5 327,927 us/op
OptionBenchmark.sumNullsValhalla avgt 5 584,967 us/op
OptionBenchmark.sumOptionalLongValhalla avgt 5 326,949 us/op
OptionBenchmark.sumOptionalValhalla avgt 5 572,833 us/op
OptionalLong is now as fast as the simple sum. And SumOptional is now identical so SumNulls
[1] https://github.com/openjdk/valhalla
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Vector classes are getting closer to becoming Value Types
The first branch representing vectors as Value Types has just landed!
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How does rust use such little memory compared to java?
Seems to have only started in earnest earlier this year, but, there is code... https://github.com/openjdk/valhalla
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Valhalla: Consolidating the user model [Brian Goetz]
The repo is quite active! I think that they just don't have anything really worth showing yet.
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Java Virtual Machine Garbage Collection and Its Performance Impact
Repo: https://github.com/openjdk/valhalla
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What are they building—and why? 6 questions for the top Java architects
Valhalla is still active https://github.com/openjdk/valhalla and you can build it yourself
- Any updates on project vallah?
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Parametric JVM (PDF): how generic specialization will be implemented (draft v0.3, highly technical, by John Rose)
Vicente Romero has a first prototype of the javac part: https://github.com/openjdk/valhalla/pull/364
SharpLab
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Is .NET just miles ahead or am I delusional?
Do these all compile to the exact same thing?
https://sharplab.io/#v2:CYLg1APgAgTAjAWAFBQMwAJboMLoN7LpHoCW...
Yes, so you are right.
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Generating C# code programmatically
Recently, while creating some experimental C# source code generators (xafero/csharp-generators), I was just concatenating strings together. Like you do, you know, if things have to go very quickly. If you have a simple use case, use a formatted multi-line string or some template library like scriban. But I searched for a way to generate more and more complicated logic easily - like for example, adding raw SQL handler methods to my pre-generated DBSet-like classes for my ADO.NET experiment. You could now say: Use Roslyn and that's really fine if you look everything up in a website like SharpLab, which shows immediately the syntax tree of our C# code.
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The One Billion Row Challenge – .NET Edition
One results in MOVSX, the other in MOVZX [1]. The difference thus is sign/zero extension when moving to the larger register. However, they seem to perform pretty much identical if I'm reading Agner Fog's instruction tables correctly.
[1] https://sharplab.io/#v2:C4LghgzgtgPgAgJgIwFgBQcDMACR2DC2A3ut...
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Any programs or websites to practice programming?
If you don't have an IDE, you can use SharpLab.io or dotnet fiddle
- Por debaixo do capô: async/await e as mágicas do compilador csharp
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C# Testing Playgrounds for old versions?
The closest online tool I can think of would be SharpLab, but you can only choose between Roslyn's git branches instead of C# versions.
- The combined power of F# and C#
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TypeScript 5.2's New Keyword: 'using'
Your code is destructuring two properties and discarding one of them. It doesn't work with a single property: https://sharplab.io/#v2:C4LgTgrgdgNAJiA1AHwAICYAMBYAUBgRj2Nw...
I think that records don't generate a deconstruct method when they only have one property, but even if you manually define one you'll get an error on `var (varName) = ...`
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Tips for entry-level .net developer?
- LinqPad is great and I love, but, IMO, it is not the best tool to start with. It does not provide intellisense or debugger in the free version. Assuming you do not want to pay for this licence just to play a little with the language, I'd suggest https://sharplab.io/. It is not as powerfull as LinqPad, but at least it gives you suggestions.
- Running a XUnit test with C#?
What are some alternatives?
.NET Runtime - .NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.
JITWatch - Log analyser / visualiser for Java HotSpot JIT compiler. Inspect inlining decisions, hot methods, bytecode, and assembly. View results in the JavaFX user interface.
Scylla - NoSQL data store using the seastar framework, compatible with Apache Cassandra
Roslyn - The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.
BenchmarkDotNet - Powerful .NET library for benchmarking
interactive - .NET Interactive combines the power of .NET with many other languages to create notebooks, REPLs, and embedded coding experiences. Share code, explore data, write, and learn across your apps in ways you couldn't before.
csharplang - The official repo for the design of the C# programming language
ASP.NET Core - ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.
JDBI - The Jdbi library provides convenient, idiomatic access to relational databases in Java and other JVM technologies such as Kotlin, Clojure or Scala.
FStar - A Proof-oriented Programming Language
EfficientDynamoDb - High-performance C# DynamoDb library