RoaringBitmap
AspNetCoreDiagnosticScenarios
RoaringBitmap | AspNetCoreDiagnosticScenarios | |
---|---|---|
24 | 53 | |
3,388 | 7,454 | |
0.8% | - | |
8.5 | 6.0 | |
10 days ago | about 1 month ago | |
Java | C# | |
Apache License 2.0 | - |
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.
RoaringBitmap
-
Iterating over Bit Sets Quickly
I was recently reading about Roaring https://roaringbitmap.org/ which is a highly optimized compressed bitset implementation. I reccomend reading about it if you are interested in this sort of thing. The talk at https://roaringbitmap.org/talks/ is especially good.
- Roaring Bitmaps
- Roaring bitmaps are compressed bitmaps, can be 100x faster
-
What feature would you like to remove in C++26?
However, I would love compressed (not just packed) bitsets too, which is something different to me. I would make it another class with a similar interface, based on something like roaring. It doesn't need to be in the standard, but it would be nice if the API was a such that one could easily swap implementations.
-
Jaccard Index
As an aside if you find yourself having to compute them on the fly, know that the Roaring Bitmaps libraries is the way to go [1]. The bitmaps are compressed, and can be streamed directly into SIMD computations (batching XORs and popcnts 256 bits wide!). The Jaccard index is just intersection_len / union_len [2] away
[1] https://roaringbitmap.org/
[2] https://roaringbitmap.readthedocs.io/en/latest/#roaringbitma...
-
Looking for fast, space-efficient key-lookup
Use a two stage approach, with a bloom/cuckoo filter stored as a https://roaringbitmap.org/ in memory. Then a secondary key/value store on disk (bolt or anything else).
-
BitSet Vs BigInteger
As an aside, if you're dealing with large bit sets, you might also want to evaluate Roaring Bitmaps.
-
Negative Incentives in Academic Research
Sidetracking a bit the conversation. What a coincidence that the author (Lemire) is also represented on Today's #1 "Ask HN: What are some cool but obscure data structures you know about?" as he is the main contributor of RoaringBitmap https://github.com/RoaringBitmap/RoaringBitmap and one of the main authors of the data structure.
- Ask HN: What are some 'cool' but obscure data structures you know about?
- Roaring bitmaps: A better compressed bitset
AspNetCoreDiagnosticScenarios
-
Asynchronous Programming in C#
Important: following #prefer-asyncawait-over-directly-returning-task from https://github.com/davidfowl/AspNetCoreDiagnosticScenarios/b... is not correct.
The concerns raised are niche and edge case and task must always be forwarded as is provided there is no post-processing or resource cleanup with idisposable.
-
Give me your async/await gotchas
This one is a pretty decent guide - https://github.com/davidfowl/AspNetCoreDiagnosticScenarios/blob/master/AsyncGuidance.md
-
What's the Benefit/Allure of Async/Await vs. CSP/Green Threads (and Other Concurrency Models)?
The C# (mostly applicat community has e.g. https://github.com/davidfowl/AspNetCoreDiagnosticScenarios/blob/master/AsyncGuidance.md written by one of the Asp.Net architects. I found this in this lovely thread https://news.ycombinator.com/item?id=36785691 which expresses my views/confusion more clearly than I can express.
-
The State of Async Rust
No it doesn't, hence why there are best practices guidelines written by the .NET architects, and there was a research project to add Go/Java co-routines as well.
https://github.com/davidfowl/AspNetCoreDiagnosticScenarios/b...
https://twitter.com/davidfowl/status/1532880744732758018?lan...
https://github.com/dotnet/runtimelab/issues/2057
https://github.com/dotnet/runtimelab/issues/2398
- Java 21 makes me like Java again
-
The Downsides of C++ Coroutines
They don't work just fine in C#, there is a reason why one of ASP.NET architects has written a guide of best practices.
https://github.com/davidfowl/AspNetCoreDiagnosticScenarios/b...
-
No-GIL mode coming for Python
Many that praise async/await in C#, kind of forget it took about 10 years to spread across all the layer of the language and runtime, since it was done via IL rewriting, it caused several issues with F# async tasks, due to the age of the ecosystem plenty of code isn't async/await friendly and needs to be wrapped into Task.Run() or similar.
There is a best practices guideline from one of the ASP.NET architects, https://github.com/davidfowl/AspNetCoreDiagnosticScenarios/b...
During last year they researched adding Go/Java's approach to .NET, but now it is too late. See the ASP.NET Q&A session at BUILD 2023.
-
Task vs threads - use cases
The best guidance I have found was from here: AsyncGuidance.md
-
How Much Memory Do You Need to Run 1M Concurrent Tasks?
To expand upon this thought, here is the AsyncGuidance doc[1] on why not to use .Result to get the return value of a completed Task in C#.
To make this simple they introduced async Main[2] a few years ago.
[1]: https://github.com/davidfowl/AspNetCoreDiagnosticScenarios/b...
-
React developer to NET
Async Guidance
What are some alternatives?
HyperMinHash-java - Union, intersection, and set cardinality in loglog space
PSI - Private Set Intersection Cardinality protocol based on ECDH and Bloom Filters
lucene - Apache Lucene open-source search software
t-digest - A new data structure for accurate on-line accumulation of rank-based statistics such as quantiles and trimmed means
CQEngine - Ultra-fast SQL-like queries on Java collections
WPF - WPF is a .NET Core UI framework for building Windows desktop applications.
Primes - Prime Number Projects in C#/C++/Python
hamt - A hash array-mapped trie implementation in C
Feign - Feign makes writing java http clients easier
Hot Chocolate - Welcome to the home of the Hot Chocolate GraphQL server for .NET, the Strawberry Shake GraphQL client for .NET and Banana Cake Pop the awesome Monaco based GraphQL IDE.
maven-compiler-plugin - Apache Maven Compiler Plugin
eShopOnWeb - Sample ASP.NET Core 8.0 reference application, powered by Microsoft, demonstrating a layered application architecture with monolithic deployment model. Download the eBook PDF from docs folder.