MPCF-TestBench

I was curious how "fast" MultipeerConnectivity operates.

MultipeerConnectivity does a lot of "magic" in a really nice way: peer to peer advertising, supporting delegated connects, and transfer of data. And it operates seamlessly over multiple transports - bluetooth and wifi, focusing on connecting "nearby" peers - while hiding a lot of that detail away.

There are some really interesting wrappers over the top of it as well, such as MultipeerKit (github repo). This repository, with it's workspace and targets, is how I'm answering that question.

I found other repositories that worked MultipeerConnectivity to create benchmarks, but most of them are dated and didn't directly compile. This is written with Swift 5, simple UI with SwiftUI, and has targets building for macOS, iOS, and tvOS.

There are two sides to this "benchmark generator app": a reflector and a test runner.

• The reflector broadcasts that it's open to chat and reflects back any data sent to it.
• The test runner is the UI that can be used to trigger data sends and collects data about how it's operating.

It's up to you - running the benchmark - to configure your devices appropriately if you want to see differences in transport modes.

Because MultipeerConnectivity works over bluetooth or wifi, and seamlessly across both - and iOS doesn't provide mechanisms to control what's on and off, I'm leaving that to the user setup if that's a dimension you want to gather measurements against.

The project includes 3 reflector targets and 2 test-runner targets.

Reflector

• macOS
• iOS
• tvOS

Test Runner

• macOS
• iOS

Command Line Builds

Development setup

brew bundle

investigating the workspace:

xcodebuild -list -workspace MPCF-TestBench.xcworkspace

schemes:

MPCF-Reflector-ios
MPCF-Reflector-mac
MPCF-Reflector-tvOS
MPCF-TestRunner-ios
MPCF-TestRunner-mac

building the projects on the command line

xcodebuild -workspace MPCF-TestBench.xcworkspace \
-scheme MPCF-Reflector-ios \
-destination 'platform=iOS Simulator,OS=13.4,name=iPhone 8'

xcodebuild -workspace MPCF-TestBench.xcworkspace \
-scheme MPCF-TestRunner-ios \
-destination 'platform=iOS Simulator,OS=13.4,name=iPhone 8'

xcodebuild -workspace MPCF-TestBench.xcworkspace \
-scheme MPCF-Reflector-mac

xcodebuild -workspace MPCF-TestBench.xcworkspace \
-scheme MPCF-TestRunner-mac

xcodebuild -workspace MPCF-TestBench.xcworkspace \
-scheme MPCF-Reflector-tvOS \
-destination 'platform=tvOS Simulator,OS=13.4,name=Apple TV'

linting the code

brew bundle
swift format lint --configuration .swift-format-config -r .