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Dave Lester (@davelester) profile picture

Dave Lester

@davelester

Developer tools and open source ecosystems. Product @ Apple. @swiftlang.📍 San Francisco

Joined March 2007
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Photo by Dave Lester (@davelester)Photo by Dave Lester (@davelester)Photo by Dave Lester (@davelester)Photo by Dave Lester (@davelester)Photo by Dave Lester (@davelester)Photo by Dave Lester (@davelester)Photo by Dave Lester (@davelester)Photo by Dave Lester (@davelester)Photo by Dave Lester (@davelester)
Dave Lester retweeted
Greg Joswiak (@gregjoz) profile picture
Greg Joswiak
@gregjozOct 19
Can’t wait to pro and tell next week.
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Dave Lester retweeted
Greg Joswiak (@gregjoz) profile picture
Greg Joswiak
@gregjozOct 8
Welcome home. October 13.
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Dave Lester retweeted
Swift Language (@SwiftLang) profile picture
Swift Language@SwiftLangSep 15
Swift 6.4 is out! 🎉 This release brings deeper interoperability, stronger platform support, and easier everyday code. swift.org/blog/swift-6.4-rel… Highlights in this thread 🧵
The Swift logo with the text Swift 6.4

ALT The Swift logo with the text Swift 6.4

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Dave Lester retweeted
Swift Language (@SwiftLang) profile picture
Swift Language@SwiftLangAug 14
What's the difference between a package index and a package registry? One helps you discover packages, the other hosts and serves them. 📦 A new post explains how they fit together. Read more: swiftpackageindex.com/blog/w…
What is a package registry? on the Swift Package Index Blog – Swift Package Index

What is a package registry? on the Swift Package Index Blog – Swift Package Index

SwiftPM tooling has three main components – SwiftPM resolves dependencies for the compiler, a package index helps you discover packages, and a package registry hosts and serves verified, immutable so…

swiftpackageindex.com
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Dave Lester retweeted
Swift Language (@SwiftLang) profile picture
Swift Language@SwiftLangAug 7
A busy summer for Swift continues. ☀️ In July: • Task Stealers land in Swift Concurrency’s runtime. • SwiftPM gets a package registry reference implementation. • A talk about explicit ownership at PLDI 2026. Read more: swift.org/blog/whats-new-in-…
What's new in Swift: July 2026 Edition

What's new in Swift: July 2026 Edition

Welcome to “What’s new in Swift,” a curated digest of releases, videos, and discussions in the Swift project and community.

swift.org
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Dave Lester retweeted
Swift Language (@SwiftLang) profile picture
Swift Language@SwiftLangJun 4
A unified networking stack for Swift, layered from low-level I/O primitives, through common protocols, to a modern HTTP client and server API. ⚙️ That's what the new Networking workgroup is building. Interested in contributing? Join us: swift.org/blog/announcing-ne…
Announcing the Networking Workgroup

Announcing the Networking Workgroup

The Swift Ecosystem Steering Group is excited to announce the creation of the Networking workgroup! Workgroups are community-led efforts, formally recognized by the project, to advance key areas of...

swift.org
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Dave Lester retweeted
Swift Language (@SwiftLang) profile picture
Swift Language@SwiftLangMar 31
Your digest of everything new in Swift has just landed! Read up on the latest release, community projects, evolution proposals, and videos from across the ecosystem: swift.org/blog/whats-new-in-…
What's new in Swift: March 2026 Edition

What's new in Swift: March 2026 Edition

Welcome to “What’s new in Swift,” a curated digest of releases, videos, and discussions in the Swift project and community.

swift.org
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Dave Lester retweeted
Swift Language (@SwiftLang) profile picture
Swift Language@SwiftLangJan 31
🗞️News from Swift: web apps, a new mail stack, 3D printing, embedded Swift updates, and some community events. Read all about it in the latest Swift blog post: swift.org/blog/whats-new-in-…
“After 20 years of shipping web applications, I have never seen fewer crashes and bugs make it to production. Performance has also been excellent, especially after moving our templates to Elementary. Our heaviest pages make it to the browser in less than 100ms.” (Nick Sloan, Studioworks)

ALT “After 20 years of shipping web applications, I have never seen fewer crashes and bugs make it to production. Performance has also been excellent, especially after moving our templates to Elementary. Our heaviest pages make it to the browser in less than 100ms.” (Nick Sloan, Studioworks)

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🎉 10 years of open source Swift! A decade ago today, we opened Swift to the world with a simple blog post: swift.org/blog/welcome What's grown since—thanks to an incredible community of contributors—has been extraordinary. Here's to the next ten years. 🧡
import Foundation let calendar = Calendar.current let openSourceDay = calendar.date(from: DateComponents(year: 2015, month: 12, day: 3))! let anniversary = calendar.date(byAdding: .year, value: 10, to: openSourceDay)! if calendar.isDateInToday(anniversary) { print("10 Years of Swift open source! 🎉") }

ALT import Foundation let calendar = Calendar.current let openSourceDay = calendar.date(from: DateComponents(year: 2015, month: 12, day: 3))! let anniversary = calendar.date(byAdding: .year, value: 10, to: openSourceDay)! if calendar.isDateInToday(anniversary) { print("10 Years of Swift open source! 🎉") }

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Dave Lester retweeted
Lucas ✦ (@lucaslovexoxo) profile picture
Lucas ✦@lucaslovexoxo9 Nov 2025
Today I played around with Embedded Swift to build a hello world app for the Pebble and was able to run it on my almost 10 year old Pebble Time Round.
Image from Lucas ✦ (@lucaslovexoxo)
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Indie developers now have more tools in their toolkit for building with Swift across platforms, thanks to @skiptools. Exciting to see a Swift community member building a business with the open source Swift SDK for Android. skip.tools/blog/skip-fuse-fr… #Android
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It's been a busy month for Swift, with lots of project updates to share. Here's a digest of the latest news: swift.org/blog/whats-new-in-…
Image from Swift Language (@SwiftLang)
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📣Announcing the first preview releases of Swift for Android, enabling you to build Android business logic with the same Swift that you use for Apple platforms. swift.org/blog/nightly-swift… #Android
Image from Swift Language (@SwiftLang)
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New tooling for profiling performance-critical services with Swift -- introducing the Swift Profile Recorder. More here: swift.org/blog/swift-profile…
Screenshot of the output of Swift Profile Recorder, running Hummingbird’s hello example visualized in Speedscope.

ALT Screenshot of the output of Swift Profile Recorder, running Hummingbird’s hello example visualized in Speedscope.

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Ahead of next week's ServerSide.swift conference in London, organizer and Swift server workgroup member @0xTim looks back at the growth of Swift as a platform for building server apps: swift.org/blog/swift-on-the-… @SwiftServerConf
The Growth of the Swift Server Ecosystem

The Growth of the Swift Server Ecosystem

Nearly ten years ago, Swift was open sourced and an official runtime for Linux was released. I’ve been involved with Swift on the server since almost the very beginning, originally picking it up as a...

swift.org
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Swift 6.2 is here, including so much 🆕🥳: ⏩Approachable concurrency 🦺Opt-in strict memory safety 📦WebAssembly support 🏃Faster build perf for macros 🐞Enhanced async debugging 📚Inline stack-based arrays 🚇Subprocess support 🧪Test result attachments swift.org/blog/swift-6.2-rel…
Swift 6.2 Released

Swift 6.2 Released

We’re excited to announce Swift 6.2, a release aimed at making every Swift developer more productive, regardless of where or how you write code. From improved tooling and libraries to enhancements in...

swift.org
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The story behind the Apple Password Monitoring service, handling multiple billions of requests per day from devices all over the world, which was recently rewritten in Swift: swift.org/blog/swift-at-appl…
In comparison with the previous Java service, the updated backend delivers a 40% increase in performance, along with improved scalability, security, and availability.

ALT In comparison with the previous Java service, the updated backend delivers a 40% increase in performance, along with improved scalability, security, and availability.

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Introducing the seamless Java/Swift interop effort! Offering both: - generated Swift macro based JNI wrappers - Project Panama based Swift accessors generated with a jextract-swift tool for high performance use-cases Early prototype is open source and we’ll share more about our plans and invite folks to collaborate early next week! github.com/swiftlang/swift-j… #ServerSideSwift2024
Image from Konrad ‘ktoso’ Malawski 🐟🏴‍☠️🇺🇦 (@ktosopl)
Image from Konrad ‘ktoso’ Malawski 🐟🏴‍☠️🇺🇦 (@ktosopl)
Image from Konrad ‘ktoso’ Malawski 🐟🏴‍☠️🇺🇦 (@ktosopl)
Image from Konrad ‘ktoso’ Malawski 🐟🏴‍☠️🇺🇦 (@ktosopl)
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I'm happy to see "feed two birds with one scone" getting more traction and widespread use compared to the stone variant. More like this
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Dave Lester retweeted
Dave Lester (@davelester) profile picture
Dave Lester
@davelester9 Apr 2024
Excited for next week's #ossummit in Seattle! Monday's plan: #sosscommunity and #chaosscon. Hallway track on Tuesday. Open to coffee/lunch meet ups - let’s talk OSPOs, developer ecosystems, package managers, or music! 👋 New and existing connections welcome!
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