ignite - surprise! your app is slow because the speed of light
Post on 14-Apr-2017
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Surprise! Your app is slow because the speed of light.
Clay Smith, New Relic @smithclay
Mobile Delivery Days 2016
CC0 wikimedia.org
When you get a review like this...
"App slow in the UK. 1 star." -BenedictC
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Who owns mobile app network issues?
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Backend/Ops
Device/Mobile Devs
"Stuff in the middle we don't control"
Mobile data growth (simplified)
Am
ount
of d
ata
Now In a couple years
Global Network Latency in Fiber
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Source Destination Great Circle Distance
RT Time in Fiber
SFO London 5,375 mi 84 ms
SFO Cape Town 10,124 mi 158 ms
1 ms at speed of light = Length of Massachusetts
After one second, your flow of thought is interrupted.
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Milli
seco
nds
1
10
100
1000
10000
Not Magic Interrupted Too Late
https://www.nngroup.com/articles/response-times-3-important-limits/
App services: more cloud, more complexity
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REST API
Auth - IdP #1Analytics
Ad Network
Auth - IdP #2
CDNs on the Edge
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Cache static and dynamic content + "uncached origin fetch"
#mobileperf Idea
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When in doubt, reduce the number of TCP connections.
TCP: Create connections faster
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TCP Fast Open can speed up opening multiple connections.
https://blog.newrelic.com/2016/02/09/http2-best-practices-web-performance/
Weighing HTTP/2
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multiplexing, compression
Hard to debug,
backend support?
Premature optimization is the source of all evil.
-Donald Knuth in 1974
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Don't touch that dial. (yet)
Building connected mobile apps is hard. Monitoring
shouldn't be.Thanks!
Clay Smith, New Relic @smithclay
Mobile Delivery Days 2016
CC0 wikimedia.org
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