Bug 57320 – Web Inspector: Unsatisfying support for objects containing large arrays in Console

• Component: Web Inspector
• Status: RESOLVED INVALID

[Mikhail Naganov]

Created attachment 87286 [details]
Repro page

Expanding an object with a huge array inside takes long time and can even crash renderer (observed in Chromium).

Consider the page attached -- it creates two objects: big1 and big2, that are almost identical. They both contain a huge array inside them, and in 'big1' this array doesn't have contents, but in 'big2' does.

If I evaluate 'big1' in console, and then expand the resulting object, I see its contents immediately. If I evaluate 'big2', and trying to expand it, I experience a delay, and with sufficiently large arrays (20M items), page can crash.

The results of both expansions are identical:

big1
  v Object
     > big_array: Array[20971520]
         f1: "aaa"
         f2: "bbb"
     > __proto__: Object

big2
  v Object
     > big_array: Array[20971520]
         f1: "aaa"
         f2: "bbb"
     > __proto__: Object

I'd expect a delay while trying to expand a 'big_array', but not when I'm expanding the container object.

[Pavel Feldman]

*** Bug 75624 has been marked as a duplicate of this bug. ***

[Radar WebKit Bug Importer]

<rdar://problem/19281532>

[Blaze Burg]

Not an issue any more since we give up showing element previews when arrays are past a reasonable size.

[Timothy Hatcher]

<rdar://problem/13281722>