Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Mobile Development - BTalk
Search
Sing Jie Lee
January 09, 2013
Technology
1
98
Mobile Development - BTalk
Talks about general iOS development and some mobile stats on BTalk - a mobile messenger.
Sing Jie Lee
January 09, 2013
Tweet
Share
More Decks by Sing Jie Lee
See All by Sing Jie Lee
Infocomm Media Youth Festival 2016 - Career Talk
singjie
0
55
Sprite Kit
singjie
0
56
SiriKit
singjie
0
200
React Native
singjie
1
84
Arduino
singjie
0
41
Software Engineering
singjie
0
50
Advanced Core Data
singjie
0
38
Amazon Echo and Home Integration
singjie
0
100
CS3216 Garena Project X
singjie
0
48
Other Decks in Technology
See All in Technology
コンパウンドスタートアップにおけるQAの成長戦略
matsu802
4
570
[2025-09-30] Databricks Genie を利用した分析基盤とデータモデリングの IVRy の現在地
wxyzzz
0
350
更高效率低成本的 Observability 2.0 時代即將來臨 (Observability 2.0 Why you need know) - DevOpsDays Taiwan 2025
shazi7804
0
360
組織観点からIAM Identity CenterとIAMの設計を考える
nrinetcom
PRO
1
120
pprof vs runtime/trace (FlightRecorder)
task4233
0
100
全てGoで作るP2P対戦ゲーム入門
ponyo877
3
1.1k
AIコーディングとエンジニアリングの現在地 / A Snapshot of AI Coding and Engineering(Sept. 2025)
ar_tama
0
140
Geospatialの世界最前線を探る [2025年版]
dayjournal
2
420
kaigi_on_rails_2025_設計.pdf
nay3
8
3.5k
業務でAIの力を最大限に発揮するために #弁護士ドットコム
bengo4com
0
280
避けられないI/O待ちに対処する: Rails アプリにおけるSSEとasync gemの活用 / Tackling Inevitable I/O Latency in Rails Apps with SSE and the async gem
moznion
2
1.7k
Beyond Multiprocessing: A Real-World ML Workload Speedup with Python 3.13+ Free-Threading
kitsuya0828
0
300
Featured
See All Featured
Art, The Web, and Tiny UX
lynnandtonic
303
21k
KATA
mclloyd
32
14k
"I'm Feeling Lucky" - Building Great Search Experiences for Today's Users (#IAC19)
danielanewman
229
22k
Being A Developer After 40
akosma
90
590k
Improving Core Web Vitals using Speculation Rules API
sergeychernyshev
18
1.2k
Understanding Cognitive Biases in Performance Measurement
bluesmoon
29
2.6k
Unsuck your backbone
ammeep
671
58k
Building Flexible Design Systems
yeseniaperezcruz
329
39k
A Modern Web Designer's Workflow
chriscoyier
697
190k
Product Roadmaps are Hard
iamctodd
PRO
54
11k
Speed Design
sergeychernyshev
32
1.1k
GitHub's CSS Performance
jonrohan
1032
460k
Transcript
Mobile Development Monday, January 21, 13
Agenda • Lifecycle of App • Mobile Design Principles •
Responsive • Memory Management • Network • Maintainability • Other Stuffs Monday, January 21, 13
Lifecycle of an App Monday, January 21, 13
Monday, January 21, 13
Different states of App Active Background Suspended Inactive Not Running
Monday, January 21, 13
Different states of App Active Background Suspended Inactive Not Running
Monday, January 21, 13
Different states of App Active Background Suspended Inactive Not Running
Free up memory Disconnect Reconnect Monday, January 21, 13
Mobile Design Principles • Performance • Responsiveness • Optimal memory
usage • Network • Maintainability Monday, January 21, 13
Responsiveness • Never block the main thread • Always dispatch
complex data handling to background threads • Utilize cache Monday, January 21, 13
Responsiveness • Image Processing User selects a picture Process Image
Main Thread Update UI Background Monday, January 21, 13
Example: Image Processing BBImageLoop::Post(^{ processedImage = ImageProcessor.Process(image); BBUILoop::Post(^{ [self updateUI:processedImage];
}); }); User selects a picture Process Image BBUILoop Update UI BBImageLoop Monday, January 21, 13
Responsiveness • Queues • BBUILoop • BBSoundLoop • BBImageLoop •
BBDLCoreData • BBDBLoop Monday, January 21, 13
Responsiveness • Queues/Operations are cancelable // Sending out Request tcp.requestNearbyBuddies();
handler = BBUILoop::DelayPost(^{ showTimeoutScreen(); }, 5000); ... ... // Response received BBUILoop::Cancel(handler); Monday, January 21, 13
• Queues • Use one queue per subsystem • Know
your queues / threads • Can be cancelled Responsiveness Monday, January 21, 13
Memory Management User Experience Low Memory Usage Monday, January 21,
13
Memory Management User Experience Low Memory Usage App is Active
Monday, January 21, 13
Memory Management User Experience Low Memory Usage App is in
Background/Suspended Monday, January 21, 13
Memory Management • Active? • Use comfortably, but be practical
• Inactive/Background? • Free up memory as much as possible • If not, Apple kills you in background Monday, January 21, 13
Anything lesser than that is a good gauge Memory Management
Apps in Background Monday, January 21, 13
Optimal Memory Usage • Stay SAFE in background • Utilize
system’s memory warning • Ensure no memory leaks Monday, January 21, 13
Use Instruments Monday, January 21, 13
Use Instruments Monday, January 21, 13
Network • Minimize network requests • Timeout is necessary •
Always assume: Network is BAD Monday, January 21, 13
Network Monday, January 21, 13
Network • Bad network : Delays • Prevent sending out
same requests before timeout • Cache responses Monday, January 21, 13
• Bad network : Disconnect • Queue critical requests •
Fast / Safe Queue • Resend requests after reconnection • Requestid is essential Network Monday, January 21, 13
• Fast Queue • Safe Queue Network Client Client Server
Server Monday, January 21, 13
• Fast Queue • Safe Queue Network Client Client Server
Server Chats Daily Life Monday, January 21, 13
Maintainability • Modular Code • Easy to Read • Proper
class/method names Monday, January 21, 13
Maintainability • BTalk is built on modular code Core Network
FileSystem MediaEngine ... DailyLife ... Video Draw Monday, January 21, 13
Added by Daily Life Plugin Monday, January 21, 13
Added by Plugins Monday, January 21, 13
Maintainability Core Network FileSystem MediaEngine ... DailyLife ... Video Draw
Plugin Manager register get Monday, January 21, 13
Some other stuffs la Monday, January 21, 13
Tracker • PivotalTracker • Schedule management tool cum bugs tracker
• Manages schedule for you • Generate Weekly Report Monday, January 21, 13
PivotalTracker Monday, January 21, 13
PivotalTracker • Generated Weekly Report and Schedule Monday, January 21,
13
Insights on Mobile Stats Monday, January 21, 13
Insights on Mobile Stats • Uses Flurry SDK • ~20kB
per session • Client stats collection is needed Monday, January 21, 13
Number of Sessions Monday, January 21, 13
Median Session Length Monday, January 21, 13
Session Length Monday, January 21, 13
User Paths Monday, January 21, 13
User Paths Monday, January 21, 13
Thank You 谢谢 Always write human readable code Monday, January
21, 13