Jimfs
Agrona
| Jimfs | Agrona | |
|---|---|---|
| 5 | 5 | |
| 2,380 | 2,740 | |
| 0.3% | 0.5% | |
| 8.5 | 8.4 | |
| about 16 hours ago | 3 days ago | |
| Java | Java | |
| Apache License 2.0 | Apache License 2.0 |
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Jimfs
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How to write unit tests in C++ relying on non-code files?
Java has in-memory file systems that are essentially geared for this exact use case, eg jimfs[0]. You create your filesystem and any files you need when your tests are starting up, and your classes talk to them rather than the “real” ones. Maybe a similar project exists for the C++ ecosystem?
[0] https://github.com/google/jimfs
- An in-memory file system for Java
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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.
Recently been using JIMFS. Made my tests much faster and cleaner!
- An in memory file system
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Working and unit testing with temporary files in Java
I use Google's JIMFS "Just In Memory Filesystem" https://github.com/google/jimfs in my unit tests and have been very happy. No need to clean something up that disappears as soon as the test is over. Let's you create unix or windows style filesystems and I've used it to test a disk space healthcheck because you can set a limit to the size of the filesystem it creates. Very flexible and easy to use.
Agrona
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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?
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Joda-Money - Java library to represent monetary amounts.
Eclipse Collections - Eclipse Collections is a collections framework for Java with optimized data structures and a rich, functional and fluent API.
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JCTools
Codename One - Cross-platform framework for building truly native mobile apps with Java or Kotlin. Write Once Run Anywhere support for iOS, Android, Desktop & Web.
Koloboke - Java Collections till the last breadcrumb of memory and performance