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HTTP/2
HTTP/2
Kazuho Oku
Fastly
HTTP/2
• CDN Fastly
• HTTP/2, TLS/1.3, QUIC
– OSS HTTP H2O
• IETF
– :
• Early Hints (RFC 8297)
• Cache Digest for HTTP/2 ( )
HTTP/2
• HTTP/1.1 HTTP/2 ?
– a) HTTP/1.1
– b) HTTP/2
– c)
– d)
HTTP/2
: http://radar.oreilly.com/2009/06/bing-and-google-agree-slow-pag.html
HTTP/2
HTTP/2
HTTP/2
: More Bandwidth Doesn't Matter - 2011 Mike Belshe (Google)
HTTP/2
: More Bandwidth Doesn't Matter - 2011 Mike Belshe (Google)
HTTP/2
Why?
HTTP/2
HTTP/1
client server
request
response
response
request
HTTP/2
…
client server
request
response
request
response
HTTP/2
HTTP/2
client server
requests
HTTP/2
HTTP/2
client server
requests
HTTP/2
• RFC 7540 (2015/5)
– Google SPDY
•
–
–
–
–
HTTP/2
HTTP/2
HTTP/2
HTTP/2
DOMContentLoaded
server
requests
HTML
JS, CSS
Images
HTTP/2
HTTP/2
HTTP/2 with Push
DOMContentLoaded
server
requests
HTML
JS, CSS
Images
HTTP/2
…
HTTP/2
…
HTTP/2
• Hooman Beheshti
– Velocity Conference 2016
– http://bit.ly/2FbQbZq
HTTP/2
Hooman Beheshti
VP Technology
HTTP/2:
What no one’s telling you
HTTP/2
The perfect page
HTTP/2
HTTP/2
HTTP/2
Private WebpageTest
5Mbps/1Mbps; 40ms latency
Chrome; h1 vs h2
~270 runs each!!
HTTP/2
HTTP/2
Packet Loss!
HTTP/2
HTTP/2
HTTP/2
HTTP/2
HTTP/2
HTTP/2
HTTP/2
Firefox
HTTP/2
HTTP/2
Slow 3G:
780Kbps/330Kbps
200ms latency
HTTP/2
Firefox; Slow 3G: 780Kbps/330Kbps, 200ms latency
HTTP/2
Firefox; 5Mbps/1Mbps, 40ms latency
HTTP/2
5Mbps/1Mbps, 40ms latency
HTTP/2
 
 
 
0% PLR 2% PLR
5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms 5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms
DocComplete h2 h2 h2 h2 h1 h1 h1 h1
Keeping score…
HTTP/2
 
 
 
0% PLR 2% PLR
5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms 5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms
DocComplete h2 h2 h2 h2 h1 h1 h1 h1
DCL Start h1 h1 h2 h1 h1 h1 h2 h1
Speed Index h2/h1 h2 h2 h2 h1 h1 h2 h2
Keeping score…
HTTP/2
Why?
HTTP/2
HTTP/2
HTTP/2
HTTP/2
HTTP/2
HTTP/2
• → H1
– = F( )
– H1 6 H2 1
•
– H2
HTTP/2
Real pages
HTTP/2
Real pages
•  8 pages (from 8 real sites)
•  16 bandwidth/latency combinations
–  Each with 0%, 0.5%, 1%, 2% PLR
•  Firefox and Chrome, TLS only, collect all metrics
•  300-400 runs with each combination
HTTP/2
Real pages
•  8 pages (from 8 real sites)
•  16 bandwidth/latency combinations
–  Each with 0%, 0.5%, 1%, 2% PLR
•  Firefox and Chrome, TLS only, collect all metrics
•  300-400 runs with each combination
HTTP/2
Analysis
•  3 Types of pages, # of resources h1àh2:
–  ~75% or higher
–  ~half
–  ~25% or lower
•  2 profiles (0%, 0.5%, 1%, 2% PLR):
–  “Broadband”: 5Mbps/1Mbps/40ms
–  “Slow 3G”: 780Kbps/330Kbps/200ms
•  3 Metrics
–  Document Complete
–  DOM Content Loaded Start
–  Speed Index
HTTP/2
Site1: Fastly customers page
130-135 requests to onload (~3MB)
~99 requests h1àh2 (2.5MB)
HTTP/2
HTTP/2
Site1; DocComplete; 5Mbps/1Mbps/40ms
HTTP/2
Site1; DCL; 5Mbps/1Mbps/40ms
HTTP/2
Site1; Speed Index; 5Mbps/1Mbps/40ms
HTTP/2
Site1; DocComplete; 780Kbps/330Kbps/200ms
HTTP/2
Site1; DCL; 780Kbps/330Kbps/200ms
***
HTTP/2
Site1; Speed Index; 780Kbps/330Kbps/200ms
HTTP/2
0% PLR 2% PLR
5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms 5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms
Site1
(Fastly)
DocComplete h2 h2 h2 h1 h1 h1 h1 h1
DCL Start h2 h1 h2 h2 h2/h1 h1 h2 h2
Speed Index h1 h2 h2 h2 h1 h2/h1 h2/h1 h2
HTTP/2
Site2
90-100 requests to onload (~1.7MB)
~47 requests h1àh2 (1.2MB)
HTTP/2
HTTP/2
Site2; DocComplete; 5Mbps/1Mbps/40ms
HTTP/2
Site2; DCL; 5Mbps/1Mbps/40ms
HTTP/2
Site2; Speed Index; 5Mbps/1Mbps/40ms
HTTP/2
Site2; DocComplete; 780Kbps/330Kbps/200ms
HTTP/2
Site2; DCL; 780Kbps/330Kbps/200ms
HTTP/2
Site2; Speed Index; 780Kbps/330Kbps/200ms
***
HTTP/2
0% PLR 2% PLR
5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms 5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms
Site1
(Fastly)
DocComplete h2 h2 h2 h1 h1 h1 h1 h1
DCL Start h2 h1 h2 h2 h2/h1 h1 h2 h2
Speed Index h1 h2 h2 h2 h1 h2/h1 h2/h1 h2
     
Site2
DocComplete h2 h2 h2 h2 h1 h2/h1 h1 h1
DCL Start h2 h2 h2 h2 h1 h1 h1 h1
Speed Index h1 h2 h1 h2 h1 h2 h1 h2
HTTP/2
Site3
176-212 requests to onload (~3.5MB)
~45-55 requests h1àh2 (2MB)
HTTP/2
HTTP/2
Site3; DocComplete; 5Mbps/1Mbps/40ms
***
HTTP/2
Site3; DCL; 5Mbps/1Mbps/40ms
HTTP/2
Site3; Speed Index; 5Mbps/1Mbps/40ms
HTTP/2
Site3; DocComplete; 780Kbps/330Kbps/200ms
HTTP/2
Site3; DCL; 780Kbps/330Kbps/200ms
HTTP/2
Site3; Speed Index; 780Kbps/330Kbps/200ms
HTTP/2
0% PLR 2% PLR
5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms 5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms
Site1
(Fastly)
DocComplete h2 h2 h2 h1 h1 h1 h1 h1
DCL Start h2 h1 h2 h2 h2/h1 h1 h2 h2
Speed Index h1 h2 h2 h2 h1 h2/h1 h2/h1 h2
     
Site2
DocComplete h2 h2 h2 h2 h1 h2/h1 h1 h1
DCL Start h2 h2 h2 h2 h1 h1 h1 h1
Speed Index h1 h2 h1 h2 h1 h2 h1 h2
     
Site3
DocComplete h2 h2 h1 h2 h2 h2 h1 h1
DCL Start h2 h2 h2 h2 h2 h2 h2 h2
Speed Index h2 h2 h1 h1 h1/h2 h1/h2 h1 h1
HTTP/2
0% PLR 2% PLR
5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms 5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms
Site1a
(Fastly)
DocComplete h2 h2 h2 h1 h1 h1 h1 h1
DCL Start h2 h1 h2 h2 h2/h1 h1 h2 h2
Speed Index h1 h2 h2 h2 h1 h2/h1 h2/h1 h2
Site1b
DocComplete h2/h1 h2 h2 h2 h1 h2 h1 h2/h1
DCL Start h1 h2 h1 h1 h1 h2/h1 h1 h1
Speed Index h1 h2 h2 h1 h1 h2/h1 h1 h1
Site1c
DocComplete h1/h2 h2 h2 h2 h1 h1 h1 h1
DCL Start h1 h1/h2 h1 h1 h1 h2 h1 h1
Speed Index h2 h2 h1 h2 h1 h2 h1 h1
Site2a
DocComplete h2 h2 h2 h2 h1 h2/h1 h1 h1
DCL Start h2 h2 h2 h2 h1 h1 h1 h1
Speed Index h1 h2 h1 h2 h1 h2 h1 h2
Site2b
DocComplete h2 h2 h2 h2 h1 h1/h2 h1 h1
DCL Start h2 h2 h1 h2 h1 h2 h1 h2
Speed Index h2 h1/h2 h1 h1/h2 h2 h2 h1 h1
Site3a
DocComplete h2 h2 h1 h2 h2 h2 h1 h1
DCL Start h2 h2 h2 h2 h2 h2 h2 h2
Speed Index h2 h2 h1 h1 h1/h2 h1/h2 h1 h1
Site3b
DocComplete h2 h2 h2 h1/h2 h2 h2/h1 h2 h2
DCL Start h2 h2 h2 h2 h2 h2 h2 h2
Speed Index h1 h2 h1 h1 h1 h2 h1 h1
Site3c
DocComplete h1 h2 h2 h2 h1 h2 h2 h2
DCL Start h1/h2 h2 h1 h1/h2 h2/h1 h2 h1 h2/h1
Speed Index h1 h2 h2 h2 h2 h2 h2 h2
HTTP/2
0% PLR 2% PLR
5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms 5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms
Site1a
(Fastly)
DocComplete h2 h2 h2 h1 h1 h1 h1 h1
DCL Start h2 h1 h2 h2 h2/h1 h1 h2 h2
Speed Index h1 h2 h2 h2 h1 h2/h1 h2/h1 h2
Site1b
DocComplete h2/h1 h2 h2 h2 h1 h2 h1 h2/h1
DCL Start h1 h2 h1 h1 h1 h2/h1 h1 h1
Speed Index h1 h2 h2 h1 h1 h2/h1 h1 h1
Site1c
DocComplete h1/h2 h2 h2 h2 h1 h1 h1 h1
DCL Start h1 h1/h2 h1 h1 h1 h2 h1 h1
Speed Index h2 h2 h1 h2 h1 h2 h1 h1
Site2a
DocComplete h2 h2 h2 h2 h1 h2/h1 h1 h1
DCL Start h2 h2 h2 h2 h1 h1 h1 h1
Speed Index h1 h2 h1 h2 h1 h2 h1 h2
Site2b
DocComplete h2 h2 h2 h2 h1 h1/h2 h1 h1
DCL Start h2 h2 h1 h2 h1 h2 h1 h2
Speed Index h2 h1/h2 h1 h1/h2 h2 h2 h1 h1
Site3a
DocComplete h2 h2 h1 h2 h2 h2 h1 h1
DCL Start h2 h2 h2 h2 h2 h2 h2 h2
Speed Index h2 h2 h1 h1 h1/h2 h1/h2 h1 h1
Site3b
DocComplete h2 h2 h2 h1/h2 h2 h2/h1 h2 h2
DCL Start h2 h2 h2 h2 h2 h2 h2 h2
Speed Index h1 h2 h1 h1 h1 h2 h1 h1
Site3c
DocComplete h1 h2 h2 h2 h1 h2 h2 h2
DCL Start h1/h2 h2 h1 h1/h2 h2/h1 h2 h1 h2/h1
Speed Index h1 h2 h2 h2 h2 h2 h2 h2
HTTP/2
0% PLR 2% PLR
5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms 5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms
Site1a
(Fastly)
DocComplete h2 h2 h2 h1 h1 h1 h1 h1
DCL Start h2 h1 h2 h2 h2/h1 h1 h2 h2
Speed Index h1 h2 h2 h2 h1 h2/h1 h2/h1 h2
Site1b
DocComplete h2/h1 h2 h2 h2 h1 h2 h1 h2/h1
DCL Start h1 h2 h1 h1 h1 h2/h1 h1 h1
Speed Index h1 h2 h2 h1 h1 h2/h1 h1 h1
Site1c
DocComplete h1/h2 h2 h2 h2 h1 h1 h1 h1
DCL Start h1 h1/h2 h1 h1 h1 h2 h1 h1
Speed Index h2 h2 h1 h2 h1 h2 h1 h1
Site2a
DocComplete h2 h2 h2 h2 h1 h2/h1 h1 h1
DCL Start h2 h2 h2 h2 h1 h1 h1 h1
Speed Index h1 h2 h1 h2 h1 h2 h1 h2
Site2b
DocComplete h2 h2 h2 h2 h1 h1/h2 h1 h1
DCL Start h2 h2 h1 h2 h1 h2 h1 h2
Speed Index h2 h1/h2 h1 h1/h2 h2 h2 h1 h1
Site3a
DocComplete h2 h2 h1 h2 h2 h2 h1 h1
DCL Start h2 h2 h2 h2 h2 h2 h2 h2
Speed Index h2 h2 h1 h1 h1/h2 h1/h2 h1 h1
Site3b
DocComplete h2 h2 h2 h1/h2 h2 h2/h1 h2 h2
DCL Start h2 h2 h2 h2 h2 h2 h2 h2
Speed Index h1 h2 h1 h1 h1 h2 h1 h1
Site3c
DocComplete h1 h2 h2 h2 h1 h2 h2 h2
DCL Start h1/h2 h2 h1 h1/h2 h2/h1 h2 h1 h2/h1
Speed Index h1 h2 h2 h2 h2 h2 h2 h2
HTTP/2
0% PLR 2% PLR
5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms 5Mbps/1Mbps; 40ms 780Kbps/330Kbps; 200ms
Site1a
(Fastly)
DocComplete h2 h2 h2 h1 h1 h1 h1 h1
DCL Start h2 h1 h2 h2 h2/h1 h1 h2 h2
Speed Index h1 h2 h2 h2 h1 h2/h1 h2/h1 h2
Site1b
DocComplete h2/h1 h2 h2 h2 h1 h2 h1 h2/h1
DCL Start h1 h2 h1 h1 h1 h2/h1 h1 h1
Speed Index h1 h2 h2 h1 h1 h2/h1 h1 h1
Site1c
DocComplete h1/h2 h2 h2 h2 h1 h1 h1 h1
DCL Start h1 h1/h2 h1 h1 h1 h2 h1 h1
Speed Index h2 h2 h1 h2 h1 h2 h1 h1
Site2a
DocComplete h2 h2 h2 h2 h1 h2/h1 h1 h1
DCL Start h2 h2 h2 h2 h1 h1 h1 h1
Speed Index h1 h2 h1 h2 h1 h2 h1 h2
Site2b
DocComplete h2 h2 h2 h2 h1 h1/h2 h1 h1
DCL Start h2 h2 h1 h2 h1 h2 h1 h2
Speed Index h2 h1/h2 h1 h1/h2 h2 h2 h1 h1
Site3a
DocComplete h2 h2 h1 h2 h2 h2 h1 h1
DCL Start h2 h2 h2 h2 h2 h2 h2 h2
Speed Index h2 h2 h1 h1 h1/h2 h1/h2 h1 h1
Site3b
DocComplete h2 h2 h2 h1/h2 h2 h2/h1 h2 h2
DCL Start h2 h2 h2 h2 h2 h2 h2 h2
Speed Index h1 h2 h1 h1 h1 h2 h1 h1
Site3c
DocComplete h1 h2 h2 h2 h1 h2 h2 h2
DCL Start h1/h2 h2 h1 h1/h2 h2/h1 h2 h1 h2/h1
Speed Index h1 h2 h2 h2 h2 h2 h2 h2
HTTP/2
• 0% → H2
• 2% → H1 H2
– DOMContentLoaded
• :
•
•
HTTP/2
PLR in the real world
HTTP/2
HTTP/2
H1 ?
HTTP/2
• QoS
– → →
– (PPPoE, , …)
•
QoS
HTTP/2
• H1
– ( )
– & (HoLB)
• H2
– RTT ( )
– ( )
•
–
•
H1/H2
HTTP/2
• HTTP/1.1 HTTP/2 ?
– a) HTTP/1.1
– b) HTTP/2
– c)
– d)
•
–
–
HTTP/2
HTTP/2
https://speakerdeck.com/patrickhamann/http2-what-where-why-and-when-smashing-conference-march-2016
HTTP/2
https://speakerdeck.com/patrickhamann/http2-what-where-why-and-when-smashing-conference-march-2016
HTTP/2
HTTP/2
•
•
•
webpagetest
HTTP/2
• JS
•
•
•
– : H2 ?
Resource-Timing
HTTP/2
Resource-Timing: caniuse?
HTTP/2
•
– ?
– ?
Resource-Timing
HTTP/2
• Resource-Timing
•
•
Sever-Timing
HTTP/2
HTTP/1.1 200 OK
Content-Encoding: chunked
Content-Type: text/html; charset=utf-8
Trailer: Server-Timing
Server-Timing: connect; dur=132, req; dur=0, process; dur=230
34e90
<!DOCTYPE html>
<HTML>
…
</HTML>
0
Server-Timing: response; dur=11, total; dur=373
Server-Timing
HTTP/2
• HTTP/2
– RTT
– H1
•
•
– webpagetest
– Resource-Timing
– Server-Timing
HTTP/2
Questions?

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