maven-compiler-plugin
RoaringBitmap
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maven-compiler-plugin | RoaringBitmap | |
---|---|---|
4 | 24 | |
186 | 3,377 | |
2.2% | 1.4% | |
8.0 | 8.5 | |
8 days ago | 7 days ago | |
Java | Java | |
- | 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.
maven-compiler-plugin
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Using JDK21 Preview Features and/or incubator classes
The configuration enablePreview exists since version 3.10.1 of the Maven Compiler Plugin. So in general I recommend to use the most recent versions of the plugins otherwise it might happen that some configuration options or alike might not exist at all or special things for newer JDK versions.
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Why did Spring Initializr Change the Default to Gradle?
Once you have built and debugged your first simple plugin, check out how mainstream/official plugins are built (you can find them on GitHub) and experiment. It really takes a week to get going, maybe less, that's it.
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A Maven project that produces Java 17 and Java 8 JAR files
The Maven Compiler Plugin uses JDK 8 and compiles only 3 source files. This is different from the 5 source files compiled in the Java 17 version.
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How are library developers expected to test multi-release jars?
Like, check out how the compiler plugin itself is tested: https://github.com/apache/maven-compiler-plugin/blob/master/pom.xml#L254
RoaringBitmap
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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
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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.
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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...
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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).
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BitSet Vs BigInteger
As an aside, if you're dealing with large bit sets, you might also want to evaluate Roaring Bitmaps.
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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
What are some alternatives?
Apache Maven - Apache Maven core
HyperMinHash-java - Union, intersection, and set cardinality in loglog space
jdk21 - JDK 21 Test repo
lucene - Apache Lucene open-source search software
maven-sources - Apache Maven Sources
CQEngine - Ultra-fast SQL-like queries on Java collections
maven-mvnd - Apache Maven Daemon
Primes - Prime Number Projects in C#/C++/Python
tycho - Tycho project repository (tycho)
Feign - Feign makes writing java http clients easier
maven-it-extension - Experimental JUnit Jupiter Extension for writing integration tests for Maven plugins/Maven extensions/Maven Core
alexandria - Full text search engine powering Alexandria.org - the open search engine.