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JanecekPetr

HN member
Joined
Tue, Jan 21, 2014, 2:53 PM UTC
HN karma
165
Public activity
38 items

About JanecekPetr

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Recent public activity

  1. comment
    Comment #43543926

    - It doesn't work with ErrorProne ( https://github.com/google/error-prone/issues?q=sort%3Aupdate... ) - you need a special plugin in your IDE for the generated classes to be visibl…

  2. comment
    Comment #43543864

    https://github.com/Randgalt/record-builder The upsides are: - it generates code and does not do anything funky with internals, - it has a lot of knobs if you need something a littl…

  3. comment
    Comment #42916038

    That's kind of the idea of Caffeine, it has admission buffers, and it adapts automatically between LRU and LFU. The original algorithm is called Windiw TinyLFU (design https://gith…

  4. comment
    Comment #35631942

    > "will not work with no recourse" No, the CLI `--add-opens` CLI option will stay. In other words, applications will need to consciously enable the encapsulation-breaking stuff. Is…

  5. comment
    Comment #33906840

    I take issue with the thing being a part of HexFormat. It should use hexformat, optionally. What if I want to dump the memory to binary or octal instead? The hexformat class itself…

  6. comment
    Comment #33160416

    Not Caffeine, that's the caching library. You probably meant one of FastUtil, Eclipse Collections, Koloboke, HPPC(-RT), they all provide primitive specializations of Maps and Colle…

  7. comment
    Comment #29551507

    For me the aha moment was to understand the logical order of SQL operations: https://blog.jooq.org/a-beginners-guide-to-the-true-order-of... . Never had a problem since.

  8. comment
    Comment #29507945

    Interestingly, no, the tag doesn't have to be in the formatting string. See https://news.ycombinator.com/item?id=29507511 .

  9. comment
    Comment #29507923

    No, this is about log4j2 which is kinda new (2.0.0 was released 2014). Otherwise, yeah, this is terrible, especially since the tag doesn't even have to be in the formatting string.…

  10. comment
    Comment #29334592

    For native binaries, we now have https://www.graalvm.org/reference-manual/native-image/ , but it probably doesn't yet work nicely with game frameworks? Not sure. There are some eng…

  11. comment
    Comment #29333414

    ...and they're missing out, that's exactly the message. By the way, I'd be shocked if Java 8 was still more than half of the running server-side JVMs. There's a lot of them for sur…

  12. comment
    Comment #29322008

    It's simply a completely different implementation. Some of the optimiization passes are the same, obviously, but overall it simply performs ... differently.

  13. comment
    Comment #29322000

    Correct! Inlining obviously costs CPU, code cache space, and makes the receiver method bigger so that it's less likely it will be inlined itself. If there ever is a decompilation o…

  14. comment
    Comment #29320369

    Nice. Thanks. (For other viewers, all the non-standard maps I'm aware of are trying to avoid allocating those pesky Map.Entry objects, that's why they generally take up much less m…

  15. comment
    Comment #29320271

    That's because they used primitives, no? In that case also look at some other options: https://www.reddit.com/r/java/comments/r0b9o9/a_tale_of_java... . While I still think Kolobok…

  16. comment
    Comment #29320186

    Indeed, max bytecode count (FreqInlineSize and MaxInlineSize) and inlining depth (MaxInlineLevel). Your GC choice will also slightly modify the inlining decisions, and then obvious…

  17. comment
    Comment #29319985

    > i couldn't even inline my functions You could, manually :). Either way if they're hot, they're inlined. One common trick for open-addressing maps in Java I don't see in your impl…

  18. comment
    Comment #28564223

    If it's not behind XX:+UnlockExperimentalVMOptions (or a preview/incubator module), it's considered stable and prod-ready, yes. Will there be fixes and improvements? Yes. Should yo…

  19. comment
    Comment #27735290

    No, they use 12 on all of my devices. Maybe update your browser or something?

  20. comment
    Comment #27567438

    Automated ffi parser soon (TM) to be in standard Java: https://github.com/openjdk/panama-foreign/blob/foreign-jextr...

  21. comment
    Comment #26558932

    This, exactly. One added issue is that ZGC does NOT support compressed oops at all.

  22. comment
    Comment #25927614

    You misread that. It says that decompression is significantly faster than LZO. In fact, decompression speeds of up to 5 GB/s is one of the reasons LZ4 is so popular.

  23. comment
  24. comment
    Comment #25109598

    For complete cheers beginners who want to learn and understand the ideas of the game, I highly recommend buying an oldish engine, Chessmaster XI: Grandmaster Edition, as it contain…

  25. comment
    Comment #21807738

    The I/O example is moot since Java 11 where Java got https://docs.oracle.com/en/java/javase/13/docs/api/java.base... , so we can do `Files.readString(Paths.get(doc.txt))`. Java 14 …