iOS 14 Web/Safari Performance Improvements #WWDC2020

Rick_HK
2 min readJul 4, 2020

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Apple just announced what’s new in web/safari on WWDC2020. Let’s take a look of what performance improvements are concerning web developers and wkwebview users.

  1. Browsing Performance

There are numbers of performance boosts in terms of browsing capabilities:

Browsing Performance for #iOS 14

i. Clicking links to unvisited page is 13% faster

ii. Clicking link to recently visited page is 42% faster

iii. Entering URL to recently visited page is 52% faster

iv. Instant back is 34% more pages

v. Rendering first page of downloading PDF is 60 times faster.

vi. Closing unresponsive tabs is 50ms faster

2. Improvements for Developers

The improvements concerning developers are followings:

Improvements for Developers #iOS14

i. CPU usage in web scrolling is 3 times less

ii. IndexedDB operation is up to 10 times faster

iii. “for-of” loops are up to 5 times faster

iv. JavaScript Promises are up to 2 times faster

v. JavaScript delete operations are up to 12 times faster.

For more web/safari related information, please keep an eye of my medium https://medium.com/@rick38yip as well as my Twitter account https://twitter.com/rick3817

That’s it.

Happy coding and I wish you a great day ;)

#ios14 #iOS #wwdc #wwdc2020 #safari #web #wkwebview #SFSafariViewController #webkit

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Rick_HK
Rick_HK

Written by Rick_HK

Hi this is Rick from Hong Kong. I am a native iOS and Android mobile developer and also a tech enthusiast. Find me on Twitter https://twitter.com/rick3817

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