kdb
Companion files to kdb+ and q (by KxSystems)
Agrona
High Performance data structures and utility methods for Java (by real-logic)
Our great sponsors
| kdb | Agrona | |
|---|---|---|
| 7 | 5 | |
| 401 | 2,736 | |
| 1.2% | 0.5% | |
| 4.0 | 8.4 | |
| 9 days ago | 21 days ago | |
| HTML | Java | |
| Apache License 2.0 | Apache License 2.0 |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
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.
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.
kdb
Posts with mentions or reviews of kdb.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-09-28.
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Function Composition in Programming Languages – Conor Hoekstra – CppNorth 2023 [video]
> And later array languages have mostly abandonned the crazy names in favour of actual words
Sharing this without comments:
- Want cleaner code? Use the rule of six
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If risc-v is successful, no need of those backdoor injectors which are compilers anymore (and absurd and grotesque bloats). Just write risc-v assembly without abusing the macro preprocessor.
ah, I see you too are a disciple of the kdb school
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if you code in J for 6 months, you will no longer think in loops, and if you stay with it for 2 years, you will see that looping code was an artifact of early programming languages, ready to be displayed in museums along with vacuum tubes
Ah, after all these years, you've finally found it: a worthy opponent for kdb source code.
- An oral history of Bank Python
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Breaking into q/kdb+
I am an experienced developer with 10+ years in various other languages (c++/python/ some scala). I am interested in getting into q/kdb+ after a recommendation from a friend in the industry. Does anyone out there have any suggestions on how to break into the industry Ive done the courses on https://code.kx.com/ and read a few suggested books but cant find any officially recognised certs I could get, and practical experience is limited ! Im not sure even id hire myself into such a role
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Are you interested in learning about low latency zero allocation programming?
For the curious, when I first ran into it it looked like this. That is not minified code, it's how people who write K write Java code. It was expected you would take that file and include it in your sources somewhere. The KDB protocol is actually very simple, basically writes out the types with a type tag, length and then the data in binary.
Agrona
Posts with mentions or reviews of Agrona.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-05-27.
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Any library you would like to recommend to others as it helps you a lot? For me, mapstruct is one of them. Hopefully I would hear some other nice libraries I never try.
Aeron for low latency apps and Agrona is you're using Aeron for data structures
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Need help navigating the Java ecosystem (coming from C++)
Martin Thompson is one of the leaders in that space: his blog is a really great place to start. His Agrona library is a bunch of high-performance data structures, which you can use directly, but which can also serve as examples of writing such code.
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WritableImage and real-time ray-tracing. I need help!
ByteBuffer methods have quite a bit of overhead. You could further try to (1) writing to a byte[] first and then using the put(byte[]) method, or (2) use sun.misc.Unsafe::putByte (maybe try with Agrona's DirectBuffer and copy the necessary lines if need be).
- Are you interested in learning about low latency zero allocation programming?
What are some alternatives?
When comparing kdb and Agrona you can also consider the following projects:
arctic - High performance datastore for time series and tick data
Disruptor - High Performance Inter-Thread Messaging Library
sqlite_http_csv - simulation kdb+ http behavior for sqlite.
fastutil - fastutil extends the Java™ Collections Framework by providing type-specific maps, sets, lists and queues.
cinder - Cinder is Meta's internal performance-oriented production version of CPython.
Chronicle Queue - Micro second messaging that stores everything to disk
jsource - J engine source mirror
Eclipse Collections - Eclipse Collections is a collections framework for Java with optimized data structures and a rich, functional and fluent API.
javakdb - Using Java with kdb+
JCTools
crapbenchmarks
Koloboke - Java Collections till the last breadcrumb of memory and performance