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Joe Darcy

@jddarcy.bsky.social
204 followers 153 following 76 posts

OpenJDK developer at Oracle, floating-point fancier, marathoner, record-setting fast walker, episodic photographer. Views expressed may or may not be held by any person or org.

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Joe Darcy @jddarcy.bsky.social · 04/10/2026
Sounds like a good opportunity for the Anakin and Padme meme :-)
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Joe Darcy @jddarcy.bsky.social · 26/08/2026
The ones I bought years ago seemed to have a higher build quality at a given price point :-(
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Joe Darcy @jddarcy.bsky.social · 26/08/2026
Yeah, they don't seem to make water piks like they used to :-(
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Joe Darcy @jddarcy.bsky.social · 14/08/2026
Not for baking though! ;-)
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Joe Darcy @jddarcy.bsky.social · 09/08/2026
The video for my JavaOne 2026 talk "Paths to New Numeric Types On the Java Platform" is now posted: youtu.be/LN0XKkjugIk #OpenJDK #Valhalla
youtu.be
Paths to New Numeric Types On the Java Platform
YouTube video by Java
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Joe Darcy @jddarcy.bsky.social · 04/07/2026
A new meaning for having a pint!
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Joe Darcy @jddarcy.bsky.social · 28/06/2026
For vo2 max, for more frequent estimated data points, I use a test on my watch supplemented by timed one-mile walks with the Rockport formula (en.wikipedia.org/wiki/VO2_max). Fitness tracking FTW!
en.wikipedia.org
VO2 max - Wikipedia
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Joe Darcy @jddarcy.bsky.social · 12/06/2026
Partial backports to JDK 26 updates and other earlier release trains underway.
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Joe Darcy @jddarcy.bsky.social · 12/06/2026
More recent external testing revealed some cases where the numerical error from FDLIBM pow was more than 600x larger than expected. After significant analysis, a subtle change to two polynomial coefficients in one of the approximations in pow was enough for the fix, bringing the error back in line.
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Joe Darcy @jddarcy.bsky.social · 12/06/2026
JDK 27 (jdk.java.net/27/), build 24 and later, have an interesting fix to StrictMath.pow developed by my colleague Anton Artemov (github.com/openjdk/jdk/...). StrictMath uses the venerable FDLIBM algorithms and the last changes to upstream FDLBIM codebase were made circa 2004.
jdk.java.net
OpenJDK JDK 27 Early-Access Builds
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Joe Darcy @jddarcy.bsky.social · 31/05/2026
Content California cat.
Orange and white cat napping amongst California poppies.
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Joe Darcy @jddarcy.bsky.social · 01/05/2026
AI executives: you have the opportunity to lead by example in terms of AI replacing employees.
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Joe Darcy @jddarcy.bsky.social · 28/04/2026
I wonder if that was before or after IBM knowingly sold Sun radioactive SRAM chips: web.archive.org/web/20151128...
web.archive.org
At the mercy of suppliers. : On a New Road
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Joe Darcy @jddarcy.bsky.social · 12/04/2026
When I've taken road trips through Utah, I've enjoyed filling my tank with all-petroleum, no ethanol gasoline as a selectable pumping option. The car did get better mileage, but the increase in milage was less than the increase in cost.
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Joe Darcy @jddarcy.bsky.social · 17/03/2026
Slides for my #JavaOne talk on "Paths to support additional numeric types on the Java platform": github.com/jddarcy/Spea... (Preview in github may not work; direct download seems fine.)
github.com
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Joe Darcy @jddarcy.bsky.social · 14/03/2026
Happy ½τ day to all who celebrate.
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Joe Darcy @jddarcy.bsky.social · 11/03/2026
Looking forward to #JavaOne next week; I found this one-page view of the conference schedule helpful in planning what to see: dev.java/community/ja... HTH
dev.java
JavaOne 2026 Schedule
All sessions at JavaOne in California, March 17–19, 2026 - designed by, organized by, and run by developers
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Joe Darcy @jddarcy.bsky.social · 05/03/2026
Less than two weeks until my #JavaOne talk on "Paths to New Numeric Types On the Java Platform" [LRN1429] reg.rf.oracle.com/flow/oracle/... See on you on Tuesday, March 17, 11:30 AM to 12:20 PM PDT in Room 105.
reg.rf.oracle.com
Session Catalog
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Joe Darcy @jddarcy.bsky.social · 24/01/2026
Only saw a handful on them on recent visit to Pacific Grove :-(
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Joe Darcy @jddarcy.bsky.social · 29/12/2025
A regular expression would be less confusing!
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Joe Darcy @jddarcy.bsky.social · 20/12/2025
That is well outside of the usual sticker shock of the cost of gas in the bay area!
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Joe Darcy @jddarcy.bsky.social · 19/12/2025
FYI, Sigonas in Redwood City has a selection of panettoni available around Christmas time.
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Joe Darcy @jddarcy.bsky.social · 06/11/2025
... and beyond! Not in IEEE 754, but there are various trans-infinite numbers in other numbers systems, culminating with surreal numbers.
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Joe Darcy @jddarcy.bsky.social · 06/11/2025
The IEEE 754 floating-point arithmetic / kaiju cross-over movie we've all been waiting for _Godzilla Minus Zero_ (also stylized as "Godzilla -0.0") is slated for release in late 2026! en.wikipedia.org/wiki/Godzill... "Godzilla NaN" next expected sequel for an unordered challenge.
en.wikipedia.org
Godzilla Minus Zero - Wikipedia
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Joe Darcy @jddarcy.bsky.social · 29/10/2025
Now just over five weeks until the Dec. 4, 2025 start of JDK 26 rampdown 1. No time like the present to get any remaining CSRs filed. mail.openjdk.org/pipermail/jd...
mail.openjdk.org
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Reposted by Joe Darcy
Joe Darcy @jddarcy.bsky.social · 13/12/2024
For those of us in the bay area, with one of the first rain storms of the season, a reminder to check the local storm drains to see if they are clear of debris blocking their flow.
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Reposted by Joe Darcy
Jeff Dinkins @jeffatsun.bsky.social · 10/10/2025
I'm seeing lots of AI generated Java Dukes appearing with a mouth, feet, ears and more. Tip: when using AI, upload this “Duke Specification” image, prompt AI to follow as a reference. I think you'll find the resulting image is much better. Ex: "draw duke on a skateboard referencing this spec image"
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Joe Darcy @jddarcy.bsky.social · 01/10/2025
Given prop 13, new funding for local bonds or similar? (In my area, a larger portion of the water bill was transferred over to the property tax bill.)
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Joe Darcy @jddarcy.bsky.social · 24/09/2025
Also at the time, the door sets came with both rounded-corner and square-cornered strike plates, matching whatever you might already have.
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Joe Darcy @jddarcy.bsky.social · 24/09/2025
I ordered from www.baldwinhardwaredirect.com per-acquisition. At least at the time, you could order different finishes for each side. I used that feature to have a chrome finish inside the bathroom, matching the facets, etc., and brass outside.
baldwinhardwaredirect.com
Baldwin Hardware Online | Baldwin Hardware Direct
Browse our catalog of high-quality Baldwin hardware online. We carry doorknobs, locks, levers, touchscreen entrances, and other handcrafted home accessories.
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Joe Darcy @jddarcy.bsky.social · 24/09/2025
One of those outlet wiring testers is a good tool to have in one's electrical toolbox; trust-but-verify all the existing work too.
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Joe Darcy @jddarcy.bsky.social · 24/09/2025
Agreed; switching out the builder-grade door sets is a worthwhile upgrade. Too bad about the buyout.
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Joe Darcy @jddarcy.bsky.social · 24/09/2025
Updating the switch plates of the outlets from the stock plastic ones is an easy cosmetic upgrade too.
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Joe Darcy @jddarcy.bsky.social · 21/09/2025
Video now available for my 2025 #JVMLS talk "Paths to support additional numeric types on the Java platform": youtu.be/xCdJb_zI5us
youtu.be
Paths to Support Additional Numeric Types on the Java Platform #JVMLS
YouTube video by Java
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Joe Darcy @jddarcy.bsky.social · 20/09/2025
PS One location brought back by a customer: www.mercurynews.com/2025/09/15/a...
mercurynews.com
A Silicon Valley engineer’s go-to lunch spot closed. So he bought the place.
During John Vink’s Apple and Google years, this pit-smoked chicken in Sunnyvale was a constant.
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Joe Darcy @jddarcy.bsky.social · 22/08/2025
"We're renaming Xfinity to XNaNity to serve you better."
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Joe Darcy @jddarcy.bsky.social · 08/08/2025
Not currently. I'll post messages here once we start making public pushes of this work, branches in the Valhalla repo are a likely first destination.
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Joe Darcy @jddarcy.bsky.social · 05/08/2025
Slides for my #JVMLS talk on "Paths to support additional numeric types on the Java platform": github.com/jddarcy/Spea...
github.com
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Joe Darcy @jddarcy.bsky.social · 01/08/2025
Proposition 13 property taxes for those of us in California too.
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Joe Darcy @jddarcy.bsky.social · 29/07/2025
That describes my feelings toward "Requiem for a Dream".
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Joe Darcy @jddarcy.bsky.social · 22/07/2025
Bracing for mid-January 2038...
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Joe Darcy @jddarcy.bsky.social · 15/07/2025
JSR 269 up for maintenance review (MR) for the changes being made in Java SE 25: jcp.org/aboutJava/co... #OpenJDK
jcp.org
The Java Community Process(SM) Program - communityprocess - maintenance
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Joe Darcy @jddarcy.bsky.social · 06/07/2025
Excellent dried during other times of the year!
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Joe Darcy @jddarcy.bsky.social · 05/07/2025
Just one month to go until my #JVMLS talk on "New Numeric Types in Java": openjdk.org/projects/mlv...
openjdk.org
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Joe Darcy @jddarcy.bsky.social · 03/07/2025
Even if solar provides dirt cheap generation for utilities, given regulatory capture benefiting those utilities, not guaranteed customers would see any cost savings.
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Joe Darcy @jddarcy.bsky.social · 03/07/2025
Ouch!
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Joe Darcy @jddarcy.bsky.social · 03/07/2025
Also good for increased local resilience against earthquakes, wildfires, and any other disaster. Prior to the multi-day outage for my neighbor, I had two nearly 24-hour outages from PG&E less than 6 months apart. If I didn't have some on-site portable battery storage, 2X loss of fridge contents.
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Joe Darcy @jddarcy.bsky.social · 03/07/2025
PG&E unreliability in northern California was a significant factor in me deciding to get a solar + battery system installed in the bay area last year. My neighbors one street after were w/o power for about a week a previous summer due to PG&E equip failures after a localized wild fire in park.
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Joe Darcy @jddarcy.bsky.social · 01/07/2025
I first heard of this piece of American history via that podcast episode. I don't recall the information plaques at Manzanar describing this situation either.
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Joe Darcy @jddarcy.bsky.social · 01/07/2025
A podcast episode discussing this situation from a legal perspective: learnconlaw.com/86-enemy-ali...
learnconlaw.com
Enemy Aliens | What Roman Mars Can Learn About Con Law
<p>Falsely claiming there is a wave of violence perpetrated by migrants, Trump has threatened mass deportations under the broad and terrifying powers of the Alien Enemies Act.</p> ...
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