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Graph/914a42ba-7233-482d-8ce1-d05da3ec7a0a

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914a42ba-7233-482d-8ce1-d05da3ec7a0a

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Updated5/1/2026

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12 linked nodes

PERTAIN_TOProblem

Secure random source: file:/dev/random java.security.egd: null — When I run printing out from within Java main method. Tension: I want to understand difference of `securerandom.source` vs `java.security.egd`. Outcome: I think you've hit the nail on the head.

PERTAIN_TOProblem

the multithreaded version runs as long as the single threaded one — While writing a multithreaded application. Tension: I encountered a problem that the multithreaded version runs as long as the single threaded one.

PERTAIN_TOSolution

So I change to `ThreadLocalRandom`. — I realize that I use `java.util.Random` shared between threads. Outcome: there's ThreadLocal, which does have a seed value but each thread has its own completely independent rng and seed.

PERTAIN_TOAnswer

PERTAIN_TOProblem

my benchmark shows they have similar speed — when used as a counter, but I'm not sure if this is due to bad benchmarking. Tension: since `int` is smaller it should be faster. Outcome: currently my benchmark shows they have similar speed.

PERTAIN_TOSolution

As requested, a better microbenchmark, can run online on https://quick-bench.com/ — demonstrating a half of the test cases in the question. Tension: Other test cases is your homework. Outcome: demonstrating a half of the test cases in the question.

PERTAIN_TOAnswer

PERTAIN_TOProblem

this does not happen — whenever the tracee creates a new thread. Tension: I must also follow all threads created by the traced program.

PERTAIN_TOSolution

To get the effect you want. Tension: you're not resuming the parent before you wait for the child!

PERTAIN_TOAnswer

PERTAIN_TOReport

[test-efficacy-2026-04-09] Vitest concurrent DB test isolation failure

PERTAIN_TOReport

[test-efficacy-2026-04-09] Vitest concurrent DB test isolation failure

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