The Chapel Programming Language is an open source project to make parallel programming easier, portable and fast.
Today, we are releasing Chapel 2.7, our first new version since joining HPSF. Highlights include a new flag for vector libraries, improved support for debugging, and advances to the Mason package manager.
Learn more about these changes, and others, at: https://chapel-lang.org/blog/posts/announcing-chapel-2.7/
Interested in doing exploratory analytics interactively on data sets that exceed your workstation’s capacity? Learn about Arkouda, and how it compares to Pandas, Dask, and Spark, in this talk and demo given at the UW eScience Data Science Seminar:
https://www.youtube.com/watch?si=c_o0S6_FV-XKS72i&v=kOKmJdimYnI&feature=youtu.be
Can Chapel be used to write transformers? How does the resulting performance compare against C++ or PyTorch? Check out the second and final article in Thitrin Sastarasadhit’s “Transformers from Scratch in Chapel and C++” series on the Chapel blog:
HPSFCon 2026 focuses on open-source software for HPC, to be held in Chicago IL, March 16–20.
If you have Chapel work to show off, or other topics related to HPC SW, community building, etc., submit a talk, poster, or panel discussion by January 11th at: https://events.linuxfoundation.org/hpsf-conference/program/cfp/
Chapel is at HPE Discover Barcelona this week! Stop by the High Performance Software demo station (#227) on December 3rd and 4th to chat with Daniel Fedorin about Chapel and Arkouda.
With #SC25 wrapped and the U.S. Thanksgiving break behind us, it is time to gear up for the final stretch of 2025. Make sure to recap recent Chapel events featured in the November newsletter.
https://chapel.discourse.group/t/chapel-newsletter-november-2025/46092
For those in the Seattle area, Brad Chamberlain will be speaking at the UW Data Science Seminar tomorrow, December 2nd, introducing Arkouda—the Chapel-based framework supporting interactive data science at scale from Python.
For details, see: https://escience.washington.edu/events/uw-data-science-seminar-brad-chamberlain/
This article is notable in that it’s the first written by a student and also the first to be submitted directly by an external contributor now that the Chapel blog’s repository is public:
New on the Chapel blog: Read part 1 of Thitrin Sastarasadhit’s experience implementing Transformers from scratch in Chapel and C++, comparing to Python. This work was done as an undergraduate summer internship at University of Tokyo under Kenjiro Taura.
If you’re at #SC25 and haven’t had the chance to talk to Oliver or Engin about Chapel and Arkouda yet, be sure to stop by the High Performance Software demo station at the HPE booth while the show room floor is open today or tomorrow!
The French paper magazine ‘programmez!’ has printed an article on GPU programming in Chapel by Daniel Fedorin! Grab a digital copy and check out this and other articles here:
https://www.programmez.com/magazine/article/ia-les-interrogations-les-peurs
The Chapel team at HPE is proud to announce that we are now an official HPSF project! For details, please see HPSF’s announcement at:
Chapel’s November Newsletter is out! As with last year’s edition, this one features a special section for events at #SC25. It also has news from ChapelCon ’25, talks, articles, and other community events.
https://chapel.discourse.group/t/chapel-newsletter-november-2025/46092
Brad Chamberlain will give a talk on Chapel tomorrow (Friday, Nov 7) at @SeaGL — the Seattle GNU/Linux Conference dedicated to open-source software, hardware, and culture. To attend this free conference in person or remotely, please see: https://seagl.org/attend
PSA: The Chapel website has been having some connectivity and security certificate issues over the past day or two. We apologize for the inconvenience and are working with our hosting company to bring it back online and stabilize it.
This week’s episode of HPE’s “Technology Now” podcast focuses on Chapel, featuring a discussion between Brad Chamberlain and Michael Bird!
Head to https://hpe.lnk.to/Chapelgu to stream it from your favorite podcast platform.
In case you missed it live, Engin Kayraklioglu's talk at LUMI User Coffee Breaks is now available online. Check it out to learn more about how Chapel makes going from programming a laptop to a supercomputer easy.
Should a good parallel language design be minimal in nature? Read Brad Chamberlain's take on this question in this month's edition of his "10 Myths About Scalable Parallel Programming Languages" blog series.
Have an idea for the new Chapel logo? Make sure to read https://github.com/chapel-lang/chapel/issues/27901 and submit your proposal by October 21st!
Upcoming talk alert: Join Engin Kayraklioglu during the LUMI User Coffee Break on October 15th 9AM ET. He will cover several applications of Chapel and how its language features allow its users to go from laptops to supercomputers with ease.
More info & link: https://www.lumi-supercomputer.eu/events/usercoffeebreaks/
