V8

Question 1

What is essential for explaining how optimizations such as inline caches work in V8?

Answer 1

Understanding how properties work, particularly how V8 can provide fast property access while handling dynamically-added properties.

Question 2

What different JavaScript engine do nodeJs and deno each use?

Answer 2

They actually both use v8

Question 3

High level, what are the differences in handling named vs integer-indexed properties?

Answer 3

…

https://v8.dev/blog/fast-properties

Question 4

In objects integer indexed properties are aka

Answer 4

Elements

Question 5

In v8 every object has what associated?

Answer 5

a HiddenClass