JavaScript, HTML, CSS, HTTP, performance, security, Bash, Unicode, i18n, macOS.
Recently, React core hit a scary V8 performance cliff.
Here’s a technical deep dive explaining what happened behind the scenes in V8, and how we fixed it!
https://v8.dev/blog/react-cliff …pic.twitter.com/iq4CVCKRLF
-
Quick comments: 1. Can’t say “thought” so much as “abstraction leak” was behind ‘typeof null’ :-/. 2. -1*0 === -0 but 0 === -0 too per IEEE754 recommendation. Testing for -0 requires more work e.g. 1/-0 === -Infinity. 3. Did hidden class get renamed “shape”? SpiderMonkey term.pic.twitter.com/vruSOVL0YZ
1. I remember DM'ing you to confirm before our presentation (thanks again)! 2. We covered this: https://www.youtube.com/watch?v=0I0d8LkDqyc&t=28m20s … but decided to omit this side note from the article. Also, http://Object.is ftw! 3. V8 still calls them "maps", but "shapes" is the clearest term IMHO.
-
-
"Shapes" is true and beautiful. Alternatives range from vague/broad to ugly :-P.
-
Agreed! From our first write-up in this series: https://mathiasbynens.be/notes/shapes-ics …pic.twitter.com/wgFCof8f84
Kraj razgovora
Novi razgovor -
Čini se da učitavanje traje već neko vrijeme.
Twitter je možda preopterećen ili ima kratkotrajnih poteškoća u radu. Pokušajte ponovno ili potražite dodatne informacije u odjeljku Status Twittera.