Otimizações de Performance Web: Desafios do Mundo Mobile
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Transcript of Otimizações de Performance Web: Desafios do Mundo Mobile
![Page 1: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/1.jpg)
A WEB MOBILE !
OTIMIZAÇÕES E DESAFIOS DE PERFORMANCE
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@sergio_caelumsergiolopes.org
![Page 3: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/3.jpg)
sergiolopes.org
![Page 4: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/4.jpg)
sergiolopes.org
![Page 5: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/5.jpg)
74% DOS USUÁRIOS
FALAM QUE ABANDONAM O SITE MOBILE DEPOIS DE 5s DE ESPERA
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85% DOS USUÁRIOS
ESPERAM QUE UM SITE ABRA NO CELULAR TÃO OU MAIS RÁPIDO QUE NO DESKTOP
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OTIMIZAÇÕES WEB 101
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OTIMIZAÇÕES WEB 101CONCATENAR CSS / JS
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OTIMIZAÇÕES WEB 101
MINIFICAR CSS / JS
CONCATENAR CSS / JS
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OTIMIZAÇÕES WEB 101
CACHE / EXPIRES
MINIFICAR CSS / JS
CONCATENAR CSS / JS
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OTIMIZAÇÕES WEB 101
CACHE / EXPIRES
MINIFICAR CSS / JS
SPRITES CONCATENAR CSS / JS
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OTIMIZAÇÕES WEB 101
CACHE / EXPIRES
MINIFICAR CSS / JS
SPRITES CONCATENAR CSS / JS
JS EMBAIXO
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OTIMIZAÇÕES WEB 101
CACHE / EXPIRES
MINIFICAR CSS / JS
SPRITES CONCATENAR CSS / JS
JS EMBAIXO
CSS NO TOPO
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OTIMIZAÇÕES WEB 101
GZIP
CACHE / EXPIRES
MINIFICAR CSS / JS
SPRITES CONCATENAR CSS / JS
JS EMBAIXO
CSS NO TOPO
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OTIMIZAÇÕES WEB 101
GZIP
CACHE / EXPIRES
MINIFICAR CSS / JS
SPRITES CONCATENAR CSS / JS
JS EMBAIXO
CSS NO TOPO
LAZY-LOAD
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OTIMIZAÇÕES WEB 101
GZIP
CACHE / EXPIRES
MINIFICAR CSS / JS
SPRITES CONCATENAR CSS / JS
JS EMBAIXO
CSS NO TOPO
LAZY-LOAD ASSÍNCRONO
![Page 17: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/17.jpg)
#mobileperf
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GARGALOS MOBILE
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GARGALOS MOBILE
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GARGALOS MOBILE
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GARGALOS MOBILE
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GARGALOS MOBILE
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GARGALOS MOBILE
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REDE
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largura de banda &
latência (RTT)
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NY
SP
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NY
SP
7648km
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NY
SP
7648km
299,792458km/ms
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NY
SP
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NY
SP
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NY
SP
25,5 ms
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NY
SP
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NY
SP
RTT ideal = 51 ms
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DNS lookup
!
1 RTT
TCP handshake
!
1 RTT
TLS handshake
!
1-2 RTT
HTTP request
!
> 1 RTT
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latência de redes móveis
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WI-FI Mac
WI-FI celular
3G quente
3G frio
2G quente
2G frio
SP 12ms 38ms 88ms 212ms 472ms 622ms
NY 139ms 300ms
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0
800
1600
2400
3200
1 Mbps 2 Mbps 3 Mbps 4 Mbps 5 Mbps 6 Mbps 7 Mbps 8 Mpbs 9 Mbps 10 Mbps
TEMPO DE CARREGAMENTO DA PÁGINA vs LARGURA DE BANDA
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0
1000
2000
3000
4000
240ms 220ms 200ms 180ms 160ms 140ms 120ms 100ms 80ms 60ms 40ms 20ms 0ms
TEMPO DE CARREGAMENTO DA PÁGINA vs LATÊNCIA (RTT)
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BATERIA
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WI-FI - 30 ~200 mW 3G - 1000 ~ 3500 mW
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RRC Radio Resource Controller
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zzz
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zzzidle 15 mW
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zzzidle 15 mW
!!!!
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zzzidle 15 mW
connected 1000 ~ 3500 mW
!!!!
![Page 52: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/52.jpg)
DNS lookup
!
1 RTT
TCP handshake
!
1 RTT
TLS handshake
!
1-2 RTT
HTTP request
!
> 1 RTT
![Page 53: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/53.jpg)
RRC negociação
!
200 ~ 2500ms
DNS lookup
!
1 RTT
TCP handshake
!
1 RTT
TLS handshake
!
1-2 RTT
HTTP request
!
> 1 RTT
![Page 54: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/54.jpg)
4G - LTE 3.5G - HSPA+ 3G - UMTS, HSPA 2G - EDGE, GPRS
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4G - 300 Mbit/s 3.5G - 168 Mbit/s 3G - 14 Mbit/s 2G - 384 Kbit/s
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4G - 5 Mbit/s 3.5G - 1.5 Mbit/s 3G - 0.5 Mbit/s
valores máximos em contrato dos planos atuais da Vivo em SP*
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4G - <100ms 3.5G - <100ms 3G - 100 ~ 500 ms 2G - 300 ~ 1000 ms
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OTIMIZAÇÕES
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conteúdo mais próximo
do usuário
![Page 60: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/60.jpg)
conteúdo mais próximo
do usuário
![Page 61: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/61.jpg)
CDNscontent delivery network
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CDNscontent delivery network
![Page 63: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/63.jpg)
DIMINUIR # REQUESTSconcatenar JS e CSS
usar sprites cachear recursos
!(display:none em <img>)
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SEM REDIRECTS
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SEM REDIRECTS
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POLLING É DO MAL
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LAZY-LOAD JÁ ERA
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PRELOAD É O QUE HÁ
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<link rel="prefetch" href="imagem.jpg">
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<link rel="prefetch" href="imagem.jpg">
<link rel="dns-prefetch" href="http://sergiolopes.org">
![Page 71: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/71.jpg)
<link rel="prefetch" href="imagem.jpg">
<link rel="subresource" href="imagem.jpg">
<link rel="dns-prefetch" href="http://sergiolopes.org">
![Page 72: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/72.jpg)
<link rel="prefetch" href="imagem.jpg">
<link rel="subresource" href="imagem.jpg">
<link rel="prerender" href="/confirma/">
<link rel="dns-prefetch" href="http://sergiolopes.org">
![Page 73: Otimizações de Performance Web: Desafios do Mundo Mobile](https://reader034.fdocuments.net/reader034/viewer/2022052306/540dc7598d7f728d7e8b4add/html5/thumbnails/73.jpg)
por trás do TCP
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browser server
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SYN
browser server
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SYNSYN ACK
browser server
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SYNSYN ACK
ACKGET /
browser server
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SYNSYN ACK
ACKGET /
4x TCP seg.
browser server
processamento
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SYNSYN ACK
ACKGET /
4x TCP seg. ~5.8 KB
browser server
processamento
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SYNSYN ACK
ACKGET /
4x TCP seg.4x ACK
~5.8 KB
browser server
processamento
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SYNSYN ACK
ACKGET /
4x TCP seg.4x ACK
8x ACK8x TCP seg.
~5.8 KB
~11.6 KB
...
browser server
processamento
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SYNSYN ACK
ACKGET /
4x TCP seg.4x ACK
8x ACK8x TCP seg.
~5.8 KB
~11.6 KB
...
browser server
processamento
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Connection: Keep-Alive
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SYNSYN ACK
ACKGET /
4x TCP seg.4x ACK
8x ACK8x TCP seg.
~5.8 KB
~11.6 KB
...
browser server
processamento
parado...
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flush earlyJava: response.flushBuffer();.NET: Response.Flush();PHP: <?php flush(); ?>
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SYNSYN ACK
ACKGET /
4x TCP seg.4x ACK
8x ACK8x TCP seg.
~5.8 KB
~11.6 KB
...
browser server
processamento
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cwnd AW1010-packet TCP congestion window
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http://bit.ly/1pspHaP
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http://bit.ly/1pspHaP
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http://bit.ly/1pspHaP
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http://bit.ly/1pspHaP
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http://bit.ly/1pspHaP
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CRITICAL RENDERING PATH
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NUNCA ESCREVA JS QUE BLOQUEIE RENDER
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http://slidesha.re/1tuMgcs
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<script src="script.js" async></script>
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CSS TAMBÉM BLOQUEIA RENDERIZAÇÃO
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~600px
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~600px
~9000px
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~600px
~9000px
ABOVE THE FOLD (ATF)
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1 RTT ATF RENDER
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inline do CSS ATF
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inline do CSS ATF
inline do JS ATF
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inline do CSS ATF
inline do JS ATF
flush ATF
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< 14 KB (cwnd aw10)
inline do CSS ATF
inline do JS ATF
flush ATF
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< 14 KB (cwnd aw10)
inline do CSS ATF
inline do JS ATF
flush ATF
resto do CSS e JS tudo async
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RENDERIZAÇÃO
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EVITE FRAMEWORKS PESADOS & SUBUTILIZADOS
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QUEBRE JS PESADO
setImmediate requestAnimationFrame
Web Workers
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setImmediate(function(){ // pedaço de processo longo});
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requestAnimationFrame(function(){ // quadro de animação});
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animações na GPU com CSS3
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.fadeout { opacity: 0; transition: opacity 2s ease;}
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cuidado com elementos carosbox-shadow / gradient / SVG / data-uri
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TESTES, ANÁLISES
&
TRADEOFFs
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RUMReal User Monitoring
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BÔNUS: INTERFACE PERFORMÁTICA
delay de 300 ms no click interface instantânea & sync em bg
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LATÊNCIA REDES MÓVEIS HTTP CRITICAL PATH RENDERIZAÇÃO TESTES TRADEOFFS
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A WEB MOBILE !
OTIMIZAÇÕES E DESAFIOS DE PERFORMANCE
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OBRIGADO!
sergiolopes.org @sergio_caelum