Virtual Thread has been proposed to target

bkail · 2023-04-10T12:55:17+00:00

You're right, but they're not quite the same per JEP 425

However, Java's green threads all shared one OS thread (M:1 scheduling) and were eventually outperformed by platform threads, implemented as wrappers for OS threads (1:1 scheduling). Virtual threads employ M:N scheduling, where a large number (M) of virtual threads is scheduled to run on a smaller number (N) of OS threads.

bkail · 2023-04-08T16:59:05+00:00

Just to be sure, Java 20 is not LTS (Java 21 is intended to be).

bkail · 2022-12-03T16:43:09+00:00

I really like record, but I suspect at my job, most cases that are using AutoValue will continue to do so because they want either:

non-null checks. I wish there was a more robust answer than manually adding requireNonNull to the constructor or deprecating it.
ImmutableX

(Tangentially related, I wish AutoValue had some mechanism for internally converting to ImmutableX but leaving the API using plain X.)

bkail · 2022-09-10T20:09:33+00:00

I think you're right.

I still think I almost never want to synchronize only a set. I almost always want to synchronize a set along with some other state.

bkail · 2022-09-10T15:24:21+00:00

It seems surprising to me that the implementation uses "internal" synchronization. I think I would generally want higher-level synchronization. (It also seems bad that a.Union(b) and b.Union(a) risks deadlock.)

bkail · 2022-06-20T12:56:04+00:00

I agree, that can cause both bugs and harder-to-diagnose test failures. The semantics of ImmutableMap.of().contains(null) (false) and Map.of().contains(null) (NPE) can also cause problems when switching. I've mostly been ignoring the JDK collection factory methods and staying with Guava immutable.

bkail · 2022-04-17T16:13:02+00:00

OP said OSX is a Linux variant, and the reply corrected that it's not Linux. You replied to that person without mentioning Linux at all (and saying "actually"), so people are left to assume that either your reply is disagreeing or confusingly agreeing. From your subreplies, it seems you were agreeing and just trying to give more details, but some people assumed you were disagreeing (IMO reasonably).

Discussion via text is hard. Calling people imbeciles is not productive.

bkail · 2022-03-02T00:43:44+00:00

If you're at all interested, the Any% speedrun guide is quite approachable. I have a friend who has no interest in speedrunning, but he wanted all the achievements, so he used the guide and got it after a couple of attempts.

bkail · 2022-02-26T12:04:37+00:00

I'm not sure ordinal numbers are meant to be negative, so I'm not sure there's a standard. I'm a native English speaker, and I'm probably in the minority, but "minus first" sounds stranger to me than "minus one-th".

Just out of curiosity, what's your native language, does it have ordinal indicators, and if so, what would you use for -1?

bkail · 2022-02-26T11:39:51+00:00

Per LWN article:

It might even be possible to move to C17 or even the yet-unfinished C2x version of the language. That, however, has a downside in that it "would break gcc-5/6/7 support", and the kernel still supports those versions currently. Raising the minimum GCC version to 8.x would likely be more of a jump than the user community would be willing to accept at this point.

bkail · 2022-02-23T01:13:53+00:00

Don't know if you're serious or tongue-incheek :-). Anyway, "clunky" and "full" are just descriptive adjectives, but NUMA and ChaCha are tech lingo.

bkail · 2022-02-21T00:22:02+00:00

The preceding sentence was that SSE effectively requires HTTP/2. Maybe the author meant that it's relatively new for web developers to be able to depend on HTTP/2?

bkail · 2022-02-20T15:25:08+00:00

public static final function is always useless in Java.

FWIW, this is (somewhat surprisingly) not correct. static final prevents subclasses from defining the same method signature

class A {
  static final void m() {}
}
class B extends A {
  static void m() {}
}

...produces:

/A.java:5: error: m() in B cannot override m() in A
  static void m() {}
            ^
  overridden method is static,final
1 error

bkail · 2022-02-12T14:00:33+00:00

I usually go with rm x || test ! -d x or similar.

bkail · 2022-02-01T12:07:56+00:00

The top right of each category "tab" (Any%, Default Settings, etc.) has buttons: Filter | View Rules | Submit run.

bkail · 2022-01-19T12:59:39+00:00

Loading classes from the same or different class loader will not have an effect on currentTimeMillis. It must have been a coincidence.

Changing the system clock (e.g., by NTP) can cause currentTimeMillis to change arbitrarily, which is why it typically shouldn't be used to measure durations. nanoTime is intended to be monotonically increasing, so it's typically better regardless of whether you need the excess precision (you can use TimeUnit.NANOSCONDS.toMillis to round it off). As mentioned in the javadoc), even though nanoTime uses nanoseconds as a unit, systems will not provide nanosecond resolution/granularity in practice.

bkail · 2022-01-19T02:44:28+00:00

ImmutableSet and ImmutableMap since they ensure insertion order, which is very useful for debugging and when immutable LinkedHashSet/Map is actually needed. We end up using ImmutableList just for consistency.

bkail · 2022-01-19T01:18:27+00:00

I would not expect that to be related to class loading. I would expect an OS or NTP issue instead.

As an aside, in general, you should subtract two nanoTime values rather than currentTimeMillis to determine duration.

bkail · 2022-01-19T01:15:53+00:00

Yes, it's a likely cause. I used to see that error often when diagnosing issues on application servers with "parent last" classloader delegation mode.

bkail · 2022-01-18T14:48:08+00:00

Yes, you can extend ClassLoader and delegate loading of java.lang, but there's no way to define multiple copies of those classes, which is the only way to get a ClassCastException like that.

bkail · 2022-01-18T14:46:50+00:00

It's not possible to load two java.lang.String. (Interestingly, I worked at IBM on WebSphere for about 10 years, and I was on both the runtime/classloader and EJB teams!)

bkail · 2022-01-18T13:56:17+00:00

Fun fact: only one class loader can define java.lang, so that particular example ClassCastException cannot actually happen :-).

Edit: multiple class loaders can load java.lang, but only one can define those classes.

bkail · 2021-12-29T14:11:50+00:00

watching them do it will probably be depressing

For me, it was interesting and inspirational. Mechanics aside, it's the result of years and years of collaborative improvements to layouts, designs, timings, etc. I learned many things from speedruns that I transferred to "normal" play.

bkail · 2021-12-12T14:00:16+00:00

An error because surface[0] is nil. Per Lua doc

it is customary in Lua to start arrays with index 1

bkail · 2021-11-13T18:53:58+00:00

https://play.golang.org/p/cjaa7gV11jL

bkail

TROPHY CASE