This document discusses server-side Swift, including: - An overview of the history and growth of programming languages from the 1940s to today. - Features of the Swift programming language like variables, optionals, and closures. - Tools for server-side Swift development like the Swift Package Manager. - Benefits of using Swift for server applications like performance, safety, and Apple support. - Popular web frameworks for Swift including Perfect, Vapor, and Kitura. - Benchmarking server applications written in Swift.

1. Server Side Swift
Hüseyin APTİOĞLU | Software Infrastructure

2. Agenda
• Crash-Course Swift
• Swift Package Manager
• Server Side
• Benchmarking

3. Swift
• 1940s -> 9 programming languages
• 1950s -> 58 programming languages
• Fortran (concept)
• Fortran II
• Lisp
• …
• 1960s -> 113 programming languages
• Fortran IV
• Basic
• Cobol
• …
• 1970s -> 170 programming languages
• Pascal
• Smaltalk
• C
• ….
• 1980s -> 231 programming languages
• Turbo Pascal
• Erlang
• C ++
• Objective C
• ….
http://www.slideshare.net/GiordanoScalzo/the-joy-of-serverside-swift-development?qid=c2bc7c73-5bac-47e1-b834-45ac4b35edde&v=&b=&from_search=7

4. Swift
• 1990s -> 292 programming languages
• Python
• Java
• Ruby
• Visual Basic
• Delphi
• ….
• 2000s -> 339 programming languages
• C#
• Scala
• Go
• ….
• 2010s -> 354 programming languages
• Rust
• Kotlin
• Elm
• ….
http://www.slideshare.net/GiordanoScalzo/the-joy-of-serverside-swift-development?qid=c2bc7c73-5bac-47e1-b834-45ac4b35edde&v=&b=&from_search=7

5. Swift
• 355. Swift
• v1.0 in September 2014
• Opened in Dec 2015
• v2.2 first ver. in the Open
• v3.0.1

6. Swift Tour
Mutable
Variables
Immutable

7. Swift Tour
Mutable
Type Inference
Immutable

8. Swift Tour
Optionals

9. Swift Tour
Function parameter names

10. Swift Tour
Guard Statement

11. Swift Tour
Closures

12. Swift Tour
Tuples

13. Swift Tour
Extensions

14. Swift Tour
and more …
• Enumerations
• Inheritance
• Initialization
• Error Handling
• Type Casting
• Generics
• Access Control
• …
• …

15. Swift
Why is Swift a good choice for server-side ?
• Fast
• Modern
• Safe
• Interactive
• Open Source
• Apple

16. Server-side App Trade Off
Why is Swift a good choice for server-side ?AppPerformance
Developer Productivity
C
C++
Obj.C
Java
Perl
JavaScript
Python
Ruby
Lua
Groovy

17. ARC
Automatic Reference Counting (ARC)
Swift manages the memory for you, but unlike many other high level
languages, it doesn’t use a garbage collector to do this.
- No periodically running
- No pause
- The CPU cycles for your own program

18. Automatic Reference Counting (ARC)

19. LLVM
LLVM is actually an umbrella project that includes a variety of compilers and low
level tools
In short, LLVM compiles your code to a platform-neutral Intermediary Representation (IR), which can then be
optimised and converted to the desired architecture. This allows all platform optimisation efforts to be
concentrated in one place
For Swift, Apple added a new layer to this architecture: the Swift Intermediate Language (SIL).

20. SPM
Swift Package Manager
• Part of Swift 3
• Init project
• Generate Xcode Proj
• Resolve dependencies
The Swift Package Manager is a tool for managing the distribution of Swift
code. It’s integrated with the Swift build system to automate the process
of downloading, compiling, and linking dependencies.
Package.swift

21. Swift
• Swift is easier to read
• Swift is easier to maintain
• Swift is safe
• Swift is unified with memory management
• Swift requires less code
Swift vs Objective-C

22. Swift
Swift vs Java
Swift version 3.0-dev (LLVM 491f98861f, Clang 2ff6ce54d0, Swift fd4bd4c965)
swift-DEVELOPMENT-SNAPSHOT-2016-11-29-a-ubuntu16.04
Target: x86_64-unknown-linux-gnu
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)
https://benchmarksgame.alioth.debian.org/u64q/swift.html

23. II. Most Loved

24. GitHub - apple/swift

25. Server Side Swift

26. open-source
Officially, only Linux is supported

27. open-source
Unofficially

28. Swift on Android

29. Install swift to linux
• Install required dependencies
$ sudo apt-get install clang libicu-dev
• Download the latest swift binary release from https://swift.org/download/#releases
• Extract the archive
$ tar xzf swift-<VERSION>-<PLATFORM>.tar.gz
• Add the Swift toolchain to your path
$ export PATH=/path/to/usr/bin:"${PATH}"
• Test with REPL (Read Eval Print Loop)

30. Swift Scripts
#!/usr/bin/env swift
let fruits = ["Banana", "Mango", "Apple", "Orange"]
let sortedFruits = fruits.sorted{$0 < $1}
print(sortedFruits)
chmod +x sort.swift
./sort.swift

31. Creating an Executable
Contents of file hello.swift
println("Hello world")
$ swiftc hello.swift
$ ./hello Hello world

32. Web Frameworks
• Perfect (9871)
• Vapor (7786)
• IBM Kitura (5002)
• Swifton (2042)
• Swifter (1852)
• Zewo (1502)
• …
• ...
• ...

33. Perfect 2.0

34. Vapor

35. Kitura

36. Benchmarking
wrk -d 10m -t 4 -c 20 http://10.0.1.11:(PORT)/blog

37. Benchmarking
wrk -d 10m -t 4 -c 20 http://10.0.1.11:(PORT)/json

38. Ready for Production?
Not Yet !!!
- Web frameworks < 1 year
- Server = Maturity

39. IBTECH