Hacker News: needusername

New comment by needusername in "Linux eliminates the strncpy API after six years of work, 360 patches"

needusername — Sun, 28 Jun 2026 19:52:37 +0000

Doesn‘t he hack the ship and confuse the Unix epoch with the moon landing?

New comment by needusername in "SQLite Date and Time Functions (2007)"

needusername — Sun, 15 Jun 2025 17:55:14 +0000

Ignoring time zones, the Boris Johnson approach to time zones.

New comment by needusername in "MySQL at Uber"

needusername — Mon, 17 Feb 2025 06:05:11 +0000

> using the JDBC™ protocol

JDBC is not a protocol, JDBC is an API, hence the need for a different JDBC driver per RDBMS. I doubt the author is a developer, I see this misunderstanding often with architects who don’t code.

New comment by needusername in "JEP Draft: Deprecate memory-access methods in sun.misc.unsafe for removal"

needusername — Wed, 17 Jan 2024 10:05:11 +0000

You forgot that the deployment also got more complicated.

New comment by needusername in "A Year in Review of 0-days Exploited In-the-Wild in 2022"

needusername — Mon, 31 Jul 2023 13:29:55 +0000

You can’t expect part time open source contributors to work for free for you. Instead volunteer to take over maintenance by reviewing PRs and traiging user bug reports.

New comment by needusername in "The secret life of fsync"

needusername — Mon, 03 Apr 2023 19:20:13 +0000

That or ASM devices. To my knowledge io_submit and io_getevents only really work with raw partitions anyway.

New comment by needusername in "The secret life of fsync"

needusername — Mon, 03 Apr 2023 04:56:41 +0000

> - Temp files.

O_TMPFILE should do this.

> - Unit files.

O_TMPFILE together with renameat2 and RENAME_EXCHANGE should do this.

New comment by needusername in "Coding Mistake Made Intel GPUs 100X Slower in Ray Tracing"

needusername — Mon, 25 Jul 2022 19:05:06 +0000

It’s my general impression that software is not one of Intel´s strengths.

New comment by needusername in "Psychic Signatures in Java"

needusername — Fri, 22 Apr 2022 07:17:34 +0000

Looks like you’re correct and I was wrong.

New comment by needusername in "Psychic Signatures in Java"

needusername — Fri, 22 Apr 2022 07:14:58 +0000

> I don't think there 17.0.3 ever will be available from openjdk.java.net

https://adoptopenjdk.net/upstream.html

These are the official upstream builds by the updates project built by Red Hat. Not to be confused by Red Hat Java, not to be confused by the AdoptOpenJDK/Adoptium builds. These can‘t be hosted on openjdk.java.net because they host only builds done by Oracle, not to be confused by Oracle JDK.

New comment by needusername in "Psychic Signatures in Java"

needusername — Wed, 20 Apr 2022 21:10:11 +0000

I believe Oracle 11 is affected.

New comment by needusername in "Converting integers to decimal strings faster with AVX-512"

needusername — Tue, 29 Mar 2022 19:40:23 +0000

> now because I don't know why they disabled it when it was there

E-cores (Gracemont) don't support AVX-512, only P-cores (Golden Cove) support AVX-512

New comment by needusername in "Show HN: MemSafeCrypto, Java cryptography primitives using DirectByteBuffer"

needusername — Sat, 12 Feb 2022 09:44:17 +0000

memfd_secret is probably what you want

New comment by needusername in "Log4jscanner"

needusername — Sat, 01 Jan 2022 21:10:15 +0000

No. The JAR could be inside a WAR inside an EAR.

New comment by needusername in "Fast Counting with PostgreSQL and Haskell"

needusername — Sun, 26 Dec 2021 23:33:38 +0000

Did I misunderstand the approach or is it sort of risky as it uses escaping instead of bind parameters to create the query to be explained, potentially opening itself to SQLi?

New comment by needusername in "Xcode 13.2 contains Log4j vulnerability"

needusername — Sun, 19 Dec 2021 08:07:04 +0000

Note that they are on JDK 14.0.2. An old, unsupported version of Java which doesn't get any security patches anymore. Being on a non-LTS version of Java forces them to upgrade to a new major version of Java every six months to get security patches, which they apparently don't do.

New comment by needusername in "Which version of JDK should I use?"

needusername — Sun, 10 Oct 2021 20:55:51 +0000

Getting Java through apt-get gives you more or less the worst quality builds https://mail.openjdk.java.net/pipermail/jdk8u-dev/2019-May/0...

You get mystery bits that haven't been put through the TCK.

New comment by needusername in "Why Python 4.0 might never arrive, according to its creator"

needusername — Sun, 06 Jun 2021 20:14:28 +0000

Why did it take projects and Google so long to migrate?

New comment by needusername in "Why Python 4.0 might never arrive, according to its creator"

needusername — Sun, 06 Jun 2021 20:13:45 +0000

> The GIL.

How does the the GIL prevent interleaving? My understanding is that if an "operation" takes several steps, eg. reading from a dict then IO or a C extension and finally writing to a dict the GIL will not make this atomic.

New comment by needusername in "Why Python 4.0 might never arrive, according to its creator"

needusername — Sun, 06 Jun 2021 20:10:12 +0000

> For example, in CPython multiple threads can append to a list without a lock or insert items into a dict without a lock, and the data structure will never become corrupted.

How is this achieved?

> Though it is worth pointing out that Java has a well-defined memory model, and Python doesn't.

Wouldn't you have to at least issue an mfence when a thread enters / exists the GIL?