Katie Hempenius

@katiehempenius

Making web fast .

New York, NY
katiehempenius.com
Geregistreerd in maart 2014
80 foto's en video's Foto's en video's

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  1. Vastgemaakte Tweet
    22 feb. 2019

    📊 Where is mobile faster than wifi? (and vice versa) 👇 In the US, wifi tends to be faster than mobile, but this is not a universal phenomenon. "In 41% of countries mobile was faster than wifi." Data source:

    29 antwoorden 432 retweets 902 vind-ik-leuks
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  2. 16 sep.

    Web Vitals Patterns: See how to implement common UX patterns in a way that is Core Web Vitals friendly. Includes carousels, banners, infinite scroll, & more.

    6 antwoorden 239 retweets 757 vind-ik-leuks
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  3. 31 mrt.

    Best practices for cookie notices:

    6 antwoorden 59 retweets 217 vind-ik-leuks
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  4. 12 mrt.

    How to identify and fix layout shifts:

    8 antwoorden 209 retweets 803 vind-ik-leuks
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  5. 22 sep. 2020

    Overview of CDNs: 📖 - how they work - selection - setup - performance features you should enable

    3 antwoorden 47 retweets 174 vind-ik-leuks
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  6. heeft geretweet
    22 sep. 2020

    Here's a new overview of how CDNs improve performance and general guidelines for optimizing your CDN by

    1 antwoord 19 retweets 71 vind-ik-leuks
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  7. 14 apr. 2020

    Related:

    4 retweets 9 vind-ik-leuks
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  8. 14 apr. 2020

    Great anecdote on user perception of waiting: "When Houston airport moved baggage claim *further* from arrivals, complaints about waiting for bags dropped to almost 0. Users were busy walking, so they didn't notice the wait." via great talk:

    2 antwoorden 7 retweets 67 vind-ik-leuks
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  9. 13 apr. 2020

    How to use Mac's split view: (Useful for working in two programs side by side.) 1. Click & hold the green "full-screen" button. 2. Choose the tiling position. - In Catalina: a menu bar appears. - In earlier OS X: a blue overlay appears - drag the window to left or right side.

    18 antwoorden 56 retweets 219 vind-ik-leuks
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  10. 10 apr. 2020

    Wikipedia has an API for searching for articles about things/places near a particular location. Docs (& where this code is copy-pasted from):

    13 retweets 56 vind-ik-leuks
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  11. 6 apr. 2020

    Free books on reliability (from Google SRE): - Site Reliability Engineering: How Google Runs Production Systems - The Site Reliability Workbook - Building Secure & Reliable Systems

    14 antwoorden 765 retweets 1.608 vind-ik-leuks
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  12. 1 apr. 2020

    📖New blog post: Fix an overloaded server (aka "My server is on fire what should I do?")

    6 antwoorden 116 retweets 404 vind-ik-leuks
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  13. 11 mrt. 2020

    DOM Change Breakpoints Use case: Identifying why a DOM node or subtree was modified. When the breakpoint is hit, execution pauses & the debugger flags the relevant lines of code. "Break on" menu options = the 3 variations of this breakpoint.

    9 retweets 54 vind-ik-leuks
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  14. 10 mrt. 2020

    New LightWallet feature: firstPartyHostnames API: firstPartyHostnames: undefined | Array<string> - Use this to override what Lighthouse classifies as 3rd party. To try out: update Lighthouse from the Github repo (repo is fresher than the npm package), then add to budget.json.

    4 retweets 19 vind-ik-leuks
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  15. 6 mrt. 2020

    How to recursively expand the DOM tree in DevTools (& save yourself some clicking) Note: This may take a couple seconds on large pages.

    6 antwoorden 53 retweets 259 vind-ik-leuks
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  16. 4 mrt. 2020

    📊Example of "Per function" vs. "Per block" code coverage (New in Chrome DevTools 80) "Per block" is more granular but more expensive to collect.

    2 antwoorden 16 retweets 69 vind-ik-leuks
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  17. 3 mrt. 2020

    "Animated GIFs are huge" stats will never stop boggling my mind. Data from article:

    1 antwoord 22 retweets 87 vind-ik-leuks
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  18. 17 feb. 2020

    📊Regex Lookarounds Cheatsheet Lookarounds use what comes before/after a string to decide whether it is a match. Support: Chromium, Node, no sed :'(

    5 antwoorden 39 retweets 212 vind-ik-leuks
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  19. 14 feb. 2020

    Great doc on the sources of variance in Lighthouse scores: via &

    1 antwoord 25 retweets 83 vind-ik-leuks
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  20. heeft geretweet
    20 dec. 2019

    Here's on the value of performance budgets. Listen to the full episode at:

    13 retweets 36 vind-ik-leuks
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  21. 17 dec. 2019

    Note on why this works: By default, in JS the wildcard '.' doesn't match the newline char. So the `.*(something).*` pattern returns snippets instead of all page text. (To have the wildcard match newline chars use the /s flag - but this is ES2018 only & no FF support)

    1 retweet
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