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
TDCSF14: Developing fast and efficient Tizen HT...
Search
Aki Saarinen
June 03, 2014
Programming
1
190
TDCSF14: Developing fast and efficient Tizen HTML5 mobile applications: Lessons Learned
Aki Saarinen
June 03, 2014
Tweet
Share
More Decks by Aki Saarinen
See All by Aki Saarinen
Fast and Efficient Tizen HTML5 mobile apps (Tizen Developer Summit Korea 2013)
akisaarinen
1
1.5k
Intro to 4k intros (Reaktor Dev Day 2013)
akisaarinen
0
350
Opinionated Scala (Reaktor Dev Day 2012)
akisaarinen
2
750
Other Decks in Programming
See All in Programming
未来を拓くAI技術〜エージェント開発とAI駆動開発〜
leveragestech
2
180
学習を成果に繋げるための個人開発の考え方 〜 「学習のための個人開発」のすすめ / personal project for leaning
panda_program
1
110
Honoアップデート 2025年夏
yusukebe
1
860
書き捨てではなく継続開発可能なコードをAIコーディングエージェントで書くために意識していること
shuyakinjo
1
310
デザインシステムが必須の時代に
yosuke_furukawa
PRO
2
110
実践!App Intents対応
yuukiw00w
1
360
為你自己學 Python - 冷知識篇
eddie
1
220
サイトを作ったらNFCタグキーホルダーを爆速で作れ!
yuukis
0
520
Rancher と Terraform
fufuhu
0
110
一人でAIプロダクトを作るための工夫 〜技術選定・開発プロセス編〜 / I want AI to work harder
rkaga
13
2.8k
TROCCO×dbtで実現する人にもAIにもやさしいデータ基盤
nealle
0
330
[FEConf 2025] 모노레포 절망편, 14개 레포로 부활하기까지 걸린 1년
mmmaxkim
0
1.1k
Featured
See All Featured
Faster Mobile Websites
deanohume
309
31k
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
32
1.4k
Bootstrapping a Software Product
garrettdimon
PRO
307
110k
Java REST API Framework Comparison - PWX 2021
mraible
33
8.8k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
Into the Great Unknown - MozCon
thekraken
40
2k
Rails Girls Zürich Keynote
gr2m
95
14k
Art, The Web, and Tiny UX
lynnandtonic
302
21k
Navigating Team Friction
lara
189
15k
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
53
2.9k
Code Review Best Practice
trishagee
70
19k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
Transcript
FAST and EFFICIENT Tizen HTML5 mobile applications AKI SAARINEN, REAKTOR
JAPAN @akisaarinen http://reaktor.co.jp/en/
‹#› FAST & EFFICIENT
‹#› Premature optimization is the root of all evil —
Donald Knuth “
‹#›
‹#› 1 Measure! 2 Start-up time 3 Run-time performance
‹#› 1 MEASURE!
‹#› Measure twice cut once “ — my dad
‹#› • WebKit Web Inspector • Tizendev: start-up time •
Tizendev: framerate Available tools
‹#› WebKit Web Inspector
‹#› TizenDev • Automated deploying of app • Automated start-up
timing • Automated FPS measurements • http://github.com/reaktor/tizendev
‹#› TizenDev: start-up time runs: 30
mean: 1708ms std: 63ms
‹#› TizenDev: framerate samples: 100 mean:
58 FPS std: 4 FPS
‹#› 2 START-UP
‹#› LESS IS MORE
‹#› • Lazy-loading • Minification • Reflow • Native API
calls • Parallelization
‹#› Large codebase, all loaded and parsed at start-up time
‹#› Large codebase, all loaded and parsed at start-up time
‹#› Code for first screen Modularized code, show other views
on-demand
‹#› UglifyJS, Closure Compiler, .. 1 kilobyte ~= 1 ms
‹#› Reflow
‹#› Avoid reflow REALLY!
‹#› Example: Calling width() of an element
‹#› ! container.find("li").each(function() { var listItem = $(this);
listItem.text(item.width()); }); ! forces reflow
‹#› container.appendTo($("body")); ! container.find("li").each(function() { var listItem
= $(this); listItem.text(item.width()); }); ! container.detach();
‹#› container.appendTo($("body")); ! container.find("li").each(function() { var listItem
= $(this); listItem.text(item.width()); }); ! container.detach();
‹#› 1000 elements (MacBook Pro) ! 2000 ms 60 ms
‹#› • Defer execution • Use local storage • Only
fetch needed data Native APIs
‹#› Parallelize
‹#›
‹#›
‹#› • Do lazy-loading • Use minification • Avoid reflow
• Careful with native APIs • Parallelize
‹#› 3 RUN-TIME
‹#› 60 FPS
‹#› • DOM modifications • Pre-loading • CSS3 transitions •
Scrolling
‹#› DOM = SLOW
‹#› display: none; ! + 5-10 FPS
‹#› 2 1 3 (pre-load) (pre-load) visible
‹#› Accelerated CSS3 transitions
‹#› jQuery.animate() CSS3 NO: YES:
‹#› left: 0px -> 100px translate3d() NO: YES:
‹#› background-color: ...; opacity: 0.2; NO: YES:
‹#› -webkit-transform: translate3d(0,0,0); http://stackoverflow.com/questions/3461441/prevent-flicker-on-webkit-transition-of-webkit-transform Enable 3D acceleration
‹#› Trigger animation in next render cycle
‹#› setTimeout(function() { element.css(
“-‐webkit-‐transform”, “translate3d(100,0,0)” ); }, 0);
‹#› iScroll or other JavaScript library overflow: scroll; -webkit-overflow-scroll:
touch; Momentum scrolling NO: NO: YES:
‹#› • DOM is slow • Do pre-loading • Use
CSS3 transitions • Use overflow scrolling
‹#› 1 Measure! 2 Start-up time 3 Run-time performance Re-cap!
‹#› • Performance is important • Measure before optimizing •
Minimize actions at start-up • Pay attention to FPS
‹#› Thank you! @akisaarinen
None