Welcome to the Summer 2025 edition of Chapel’s quarterly newsletter! A lot has happened in the past three months! This month’s newsletter has news from ISC, HPE Discover, IPDPS, JuliaCon, as well as our own ChapelCon ’25! Of course, there is much more that has happened in the Chapel community since our last newsletter. Read on for more!
Highlights
- Chapel 2.5 was released! Read this blog article for a summary of its highlights.
- ChapelCon ’25 will be held October 7-10, 2025.
- Registration for ChapelCon ’25 is now open. It is completely free and online!
- If you are interested in attending any tutorials at ChapelCon, and wish to see specific tutorial topics, please comment under this discussion!
- This year, ChapelCon received a record-breaking 23 submissions! Stay tuned for the detailed program.
- Chapel and Arkouda demos were presented at the ISC 2025 and HPE Discover 2025 show floors.
- Luca Ferranti proposed and organized Chapel
Julia Birds-of-a-Feather at JuliaCon 2025.
- Michael Ferguson gave a quick overview of Chapel at the BoF.
- Tiago Carneiro and Guillaume Helbecque, the two main developers behind ChOp, have participated in a joint interview in the latest edition of the 7 Questions for Chapel Users blog series.
- Chapel was featured in the Hackaday article “Going to the (Parallel) Chapel”
- Chapel and Arkouda were featured in University of Washington eScience Institute Bulletin.
- We have exceeded 1,900 stars on GitHub and 100 followers on Bluesky!
Recent Presentations, Publications, and Demos
- Brad Chamberlain gave the keynote address “Reflections on 30 years of HPC programming: So many hardware advances, so little adoption of new languages” at HIPS 2025.
- Ivan Tagliaferro de Oliveira Tezoto, Guillaume Helbecque, Ezhilmathi Krishnasamy, Nouredine Melab, and Grégoire Danoy presented their poster “Performance and Portability in Multi-GPU Branch-and-Bound: Chapel versus CUDA and HIP for Tree-Based Optimization” at IPDPS 2025.
- Raneem Abu-Yosef, Bokyeong Yoon, Martin Kong presented “Exploring Communication Anomalies in Chapel” at HIPS 2025.
- Luca Ferranti presented “Julia – Chapel Interoperability” at JuliaCon 2025.
- Jade Abraham presented “Chapel's Performance Tracking System” to the HPSF Benchmarking Working Group.
- Brad Chamberlain presented “Parallel Programming from Desktop to Supercomputers with Chapel” at Galois.
- Engin Kayraklioglu presented “Chapel’s Batteries-Included Approach for Portable Parallel Programming” at LANL’s Advances in Applied Computer Science Invited Speaker Series.
- Oliver Alvarado Rodriguez has published his Ph.D. dissertation “On the Design of a Framework for Large-Scale Exploratory Graph Analytics” at NJIT.
- New recordings of live demos are available on YouTube:
- Daniel Fedorin’s demos on Helping LLMs to Write Chapel and Chapel’s New Compiler Front-End: Dyno
- Engin Kayraklioglu’s demo on Programming Multiple GPUs using Chapel’s Parallelism and Locality Concepts
From the Chapel Blog
- Brad Chamberlain published four new articles in the “10 Myths About Scalable Parallel Programming Languages (Redux)” series, where he revisits a previous series that were published in IEEE TCSC blog in 2012. New articles in this series are:
Upcoming Events
- ChapelCon ’25 will be held October 7-10, 2025.
- Don’t forget to register! It is free and online.
- Chapel 2.6 is scheduled to be released in September.
Recurring Public Meetings
- Chapel Project Meetings are every Tuesday 10AM PT / 1PM ET / 5PM UTC
- Chapel Deep-Dives and Demos are every Thursday 10 AM PT / 1PM ET / 5PM UTC
- This slot is reserved for any discussion including demos on ongoing work, live discussion on specific topics, or anything you may want to talk about with the community. Check upcoming discussion topics and dates, or propose your topic here!
- Chapel Teaching Meetups are every 2nd Tuesday of each month 9 AM PT / Noon ET / 4PM UTC
Other Chapel Resources
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