1392180 - Expanding a big object is slow

Status: NEW

(DevTools :: Console, defect, P3)

Description

[Nicolas Chevobbe [:nchevobbe][PTO - back on October 21]]

Steps to reproduce: 

1. Open the console
2. Evaluate the following block
```
Array(10000).fill("p").reduce((res, _, i)=> {
  res["item_" + i] = i;
  return res;
}, {})
```
3. Expand the object

Expanding the object takes more than 5 seconds on my machine.
We should have bucketing for plain object too when they are quite large, like we did in the variable view.
This means having the ability to get all the properties names of the object so we can build the bucket (e.g. [item_0…item_99])