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Instant Loading
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Proprietary + Confidential
Proprietary + Confidential
Surma
@DasSurma
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Instant Loading
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Done.
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Proprietary + Confidential
End
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Instant Loading
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Instant Loading*
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Asset delivery
…fast
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“Every step you
make a user
perform before they
get value out of your
app will cost you
20% of users”
http://blog.gaborcselle.com/2012/10/every-step-costs-you-20-of-users.htm
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“Every step you
make a user
perform before they
get value out of your
app will cost you
20% of users”
http://blog.gaborcselle.com/2012/10/every-step-costs-you-20-of-users.htm
1. Install
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“Every step you
make a user
perform before they
get value out of your
app will cost you
20% of users”
http://blog.gaborcselle.com/2012/10/every-step-costs-you-20-of-users.htm
1. Install ✅
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“Every step you
make a user
perform before they
get value out of your
app will cost you
20% of users”
http://blog.gaborcselle.com/2012/10/every-step-costs-you-20-of-users.htm
1. Install ✅
2. Loading
3. ???
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Speed
= Money
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Goals
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Goals 1. Don’t be big
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Goals 1. Don’t be big
2. Only download
what you need
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Goals 1. Don’t be big
2. Only download
what you need
3. Only download
what changed
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Step.by.Step
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Compression
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goo.gl/hPLUqB
Library Size Compressed size Compression ratio
jquery-1.11.0.js 276 KB 82 KB 70%
jquery-1.11.0.min.js 94 KB 33 KB 65%
angular-1.2.15.js 729 KB 182 KB 75%
angular-1.2.15.min.js 101 KB 37 KB 63%
bootstrap-3.1.1.css 118 KB 18 KB 85%
bootstrap-3.1.1.min.css 98 KB 17 KB 83%
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goo.gl/631F31
30% over JPEG
25% over PNG
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goo.gl/Aev18k
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Round Trips
+50ms @WiFi
+500ms @3G
+2500ms @2G
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Round Trips
100 reqs/site
6 connections
>833 ms spent in RTT @WiFi
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HTTP/1.1 200 OK
Date:
...
Link: ; rel=preload; as=image
...
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Be interactive
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CSS?
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CSS?
github.com/filamentgroup/loadCSS
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Regioning/Critical
…then Rest
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https://aerotwist.com/blog/guitar-tuner/
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Defer iFrames
document.addEventListener('load', () => {
Array.from(document.querySelectorAll('iframe'))
.forEach(iframe => iframe.src = iframe.dataset.src);
});
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Conserve Data
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goo.gl/M3v9iv
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{
"css/unicorn.css": "css/unicorn-d41d8cd98f.css",
"js/unicorn.js": "js/unicorn-273c2cin3f.js"
}
https://github.com/sindresorhus/gulp-rev
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CDNs
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github.com/GoogleChrome/simplehttp2server
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Best Practices
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● Concatenation
● Sharding
● Cookies
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● Concatenation
● Sharding
● Cookies
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● Concatenation
● Sharding
● Cookies
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● Concatenation
● Sharding
● Cookies
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● Compression
● Smaller images
○ Multi-sized images
○ Multi-format images
● Reduce Round Trips
○ Redirects
○ Preconnect/Prefetch
● Be interactive
○ async/defer scripts
○ Lazy-load CSS
○ Regioning CSS
○ Defer iFrames
● Good caching
○ Cache forever or not at all
○ Hash in names
● CDNs
● HTTP/2
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Proprietary + Confidential
End
Surma
@DasSurma