Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Speaker Deck
PRO
Sign in
Sign up
for free
Predictive Prefetching
Minko Gechev
March 26, 2019
Programming
4
490
Predictive Prefetching
Minko Gechev
March 26, 2019
Tweet
Share
More Decks by Minko Gechev
See All by Minko Gechev
mgechev
0
29
mgechev
1
51
mgechev
1
150
mgechev
1
24
mgechev
1
51
mgechev
2
620
mgechev
1
77
mgechev
2
2k
mgechev
1
230
Other Decks in Programming
See All in Programming
ickx
3
590
fadis
3
1.8k
n1215
1
440
dnskimo
8
1.5k
hkusu
0
270
masamichi
0
220
hamakou108
4
500
dunglas
5
4.4k
manfredsteyer
PRO
0
140
takuyaa
4
470
sgeengineer
1
180
shun_oshidari
6
2.8k
Featured
See All Featured
philhawksworth
192
8.9k
danielanewman
201
20k
sugarenia
233
880k
maltzj
502
36k
reverentgeek
27
2.1k
colly
66
3k
lemiorhan
628
47k
deanohume
294
28k
jrom
116
7.2k
marcelosomers
221
15k
imathis
479
150k
danielanewman
2
550
Transcript
twitter.com/mgechev Predictive Prefetching twitter.com/mgechev github.com/mgechev blog.mgechev.com
twitter.com/mgechev twitter.com/mgechev github.com/mgechev
twitter.com/mgechev Evolution of the web UI Code-splitting Prefetching Guess.js Agenda
twitter.com/mgechev
twitter.com/mgechev
twitter.com/mgechev
twitter.com/mgechev https://medium.com/dev-channel/the-cost-of-javascript-84009f51e99e
twitter.com/mgechev lazy-loading
twitter.com/mgechev - Route-based - Component-based Lazy-loading strategies
twitter.com/mgechev Step 1: Open https://example.com/ Step 2: Determine JavaScript which
is likely to be required Step 3: Download the chunks Step 4: Store chunks in browser cache Pre-fetching
twitter.com/mgechev How do we pick the priorities of the bundles
to pre-fetch?
twitter.com/mgechev
twitter.com/mgechev Lazy-load everything!
twitter.com/mgechev Lazy-load everything! …and let tooling take care of the
rest
twitter.com/mgechev
twitter.com/mgechev
twitter.com/mgechev Route-based splitting
twitter.com/mgechev $ npm run build # For Angular CLI $
serve -s dist
twitter.com/mgechev Let’s emulate *really* bad conditions
twitter.com/mgechev
twitter.com/mgechev
twitter.com/mgechev Let’s take a look at the GA graph
twitter.com/mgechev
twitter.com/mgechev
twitter.com/mgechev - Main & Settings in same chunk ‣ Update
of the source code - Pre-fetch FAQ when the user is at Home Possible optimizations
twitter.com/mgechev
twitter.com/mgechev early preview
twitter.com/mgechev $ vim webpack.config.js
twitter.com/mgechev const { GuessPlugin } = require('guess-webpack'); // ... plugins:
[ // ... new GuessPlugin({ GA: 'XXXXXX' }) ] // ...
twitter.com/mgechev
twitter.com/mgechev
twitter.com/mgechev How it works…
twitter.com/mgechev - guess-ga - guess-parser - guess-webpack Packages
twitter.com/mgechev guess-ga Fetching structured data from Google Analytics
twitter.com/mgechev guess-parser Gets metadata by statically analyzing our app
twitter.com/mgechev guess-webpack Set of webpack plugins which automate the build
twitter.com/mgechev /a /a/a /a/b /b /b/a /
twitter.com/mgechev Markov Chain / /a /a/:id /b /b/a / 0
0.3 0 0.7 0 /a 0 0 0.9 0.1 0 /a/:id 0 1 0 0 0 /b 0 0 0 0 1 /b/a 0 1 0 0 0 /a /a/a /a/b /b /b/a /
twitter.com/mgechev /a /a/a /a/b /b /b/a / Activity: / /a
/a/:id /b /b/a / 0 0.3 0 0.7 0 /a 0 0 0.9 0.1 0 /a/:id 0 1 0 0 0 /b 0 0 0 0 1 /b/a 0 1 0 0 0 Probability threshold: 0.5
twitter.com/mgechev /a /a/a /a/b /b /b/a / Activity: / /a
/a/:id /b /b/a / 0 0.3 0 0.7 0 /a 0 0 0.9 0.1 0 /a/:id 0 1 0 0 0 /b 0 0 0 0 1 /b/a 0 1 0 0 0 Probability threshold: 0.5
twitter.com/mgechev /a /a/a /a/b /b /b/a / Activity: / /a
/a/:id /b /b/a / 0 0.3 0 0.7 0 /a 0 0 0.9 0.1 0 /a/:id 0 1 0 0 0 /b 0 0 0 0 1 /b/a 0 1 0 0 0 Probability threshold: 0.5
twitter.com/mgechev / /a /a/:id /b /b/a / 0 0.3 0
0.7 0 /a 0 0 0.9 0.1 0 /a/:id 0 1 0 0 0 /b 0 0 0 0 1 /b/a 0 1 0 0 0 /a /a/a /a/b /b /b/a / Activity: - Download b.bundle.js Probability threshold: 0.5
twitter.com/mgechev /a /a/a /a/b /b /b/a / Activity: - Download
b.bundle.js / /a /a/:id /b /b/a / 0 0.3 0 0.7 0 /a 0 0 0.9 0.1 0 /a/:id 0 1 0 0 0 /b 0 0 0 0 1 /b/a 0 1 0 0 0 Probability threshold: 0.5
twitter.com/mgechev /a /a/a /a/b /b /b/a / Activity: - Download
b.bundle.js / /a /a/:id /b /b/a / 0 0.3 0 0.7 0 /a 0 0 0.9 0.1 0 /a/:id 0 1 0 0 0 /b 0 0 0 0 1 /b/a 0 1 0 0 0 Probability threshold: 0.5
twitter.com/mgechev /a /a/a /a/b /b /b/a / / /a /a/:id
/b /b/a / 0 0.3 0 0.7 0 /a 0 0 0.9 0.1 0 /a/:id 0 1 0 0 0 /b 0 0 0 0 1 /b/a 0 1 0 0 0 Activity: - Download b.bundle.js - No action Probability threshold: 0.5
twitter.com/mgechev /a /a/a /a/b /b /b/a / / /a /a/:id
/b /b/a / 0 0.3 0 0.7 0 /a 0 0 0.9 0.1 0 /a/:id 0 1 0 0 0 /b 0 0 0 0 1 /b/a 0 1 0 0 0 Activity: - Download b.bundle.js - No action Probability threshold: 0.5
twitter.com/mgechev /a /a/a /a/b /b /b/a / / /a /a/:id
/b /b/a / 0 0.3 0 0.7 0 /a 0 0 0.9 0.1 0 /a/:id 0 1 0 0 0 /b 0 0 0 0 1 /b/a 0 1 0 0 0 Activity: - Download b.bundle.js - No action Probability threshold: 0.5
twitter.com/mgechev /a /a/a /a/b /b /b/a / / /a /a/:id
/b /b/a / 0 0.3 0 0.7 0 /a 0 0 0.9 0.1 0 /a/:id 0 1 0 0 0 /b 0 0 0 0 1 /b/a 0 1 0 0 0 Activity: - Download b.bundle.js - No action - Download a.bundle.js Probability threshold: 0.5
twitter.com/mgechev - https://mgv.io/dd-bundling - https://mgv.io/cost-of-js - https://mgv.io/predictive-fetching - https://mgv.io/guess References
Thank you! twitter.com/mgechev github.com/mgechev blog.mgechev.com