Hacker GitHub

← All repos

PEZ/ghost-chase-condition

View on GitHub ↗ ★ 2 Java

Chasing a performance-eating ghost down the JVM rabbit hole

7 mentions on Hacker News by 2 people: 0 stories, 7 comments · first 2022-02-06 · latest 2022-02-08

Mentions per year 7 mentions · busiest year 2022 (7)
20082026
AllStoriesComments NewestTopOldest
  1. Thanks! It does and it does not. Here's 100 rounds where it does: https://github.com/PEZ/ghost-chase-condition/tree/master/tes... But in other cases I have it seems to not help that much. Not sure how to minimize those, but will try figure…
    comment by cospaia · 2022-02-08 · in Java BitSet performance-flicker mystery
  2. …78498, Valid: true Running on: JDK 11.0.8 on Windows, with somewhat old Intel Core i7-3740QM [1] https://github.com/PEZ/ghost-chase-condition/tree/master/tes...
    comment by Codeguard · 2022-02-06 · in Java BitSet performance-flicker mystery
  3. …I have conducted some of the experiments and tried to summarize them in a reproducible way here: https://github.com/PEZ/ghost-chase-condition/tree/master/tes...
    comment by cospaia · 2022-02-06 · in Java BitSet performance-flicker mystery
  4. …of booleans. Just to demonstrate my observations that then the performance is perfectly stable. https://github.com/PEZ/ghost-chase-condition/tree/master/tes... Does that affect your analysis in any way?
    comment by cospaia · 2022-02-06 · in Java BitSet performance-flicker mystery
  5. I added this experiment, and the results (spoiler, it isn't getCurrentTimeMillis) here: https://github.com/PEZ/ghost-chase-condition/tree/master/tes...
    comment by cospaia · 2022-02-06 · in Java BitSet performance-flicker mystery
  6. Awesome. Would you consider adding this experiment to the repo? https://github.com/PEZ/ghost-chase-condition/tree/master/tes... Or, if that's a too big ask, just give me some hints how to do it, and i'll update the repo.
    comment by cospaia · 2022-02-06 · in Java BitSet performance-flicker mystery
  7. I've now made an experiment that removes System.currentTimeMillis() as a suspect: https://github.com/PEZ/ghost-chase-condition/tree/master/tes...
    comment by cospaia · 2022-02-06 · in Java BitSet performance-flicker mystery