1160854 - Super lag on autocompletion when typing in browser console

Status: RESOLVED WORKSFORME

(DevTools :: Console, defect)

Description

[noitidart]

User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0
Build ID: 20150429135941

Steps to reproduce:

I tested this on windows, and it lags. On mac it does not lag.

Open browser console.
Try to type Ci.nsIFile

After you type the `.` it will lag like crazy, then after unlag, type in n then it will lag again. It will lag till you get the F, after this the autocomplete results are few so it doesnt lag.

Here is a screencast on youtube showing the issue: https://www.youtube.com/watch?v=KSsSu_OBQcw



Expected results:

Should not lag like on mac

Comment 1

[Gingerbread Man]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0
Build ID: 20150429135941

Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:39.0) Gecko/20100101 Firefox/39.0
Build ID: 20150503004003

Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:40.0) Gecko/20100101 Firefox/40.0
Build ID: 20150502030208


Steps to reproduce:
1. Open the developer tools (F12).
2. Click the Gear icon in the top right of the pane.
3. Under Advanced Settings, check “Enable chrome and add-on debugging”.
4. Close the developer tools.
5. Open the Browser Console (Ctrl+Shift+J).
6. In the command line, type Ci.nsIFile

Actual results:
Lag in the autocomplete.

Expected results:
No lag.

Comment 2

[Alice0775 White]

Regression range:
https://hg.mozilla.org/integration/fx-team/pushloghtml?fromchange=9ce5efc16a8c&tochange=1bf269457c6b

Regressed by:
32d180146c1d	Christos Stathis — Bug 790016 - Web console remote protocol sends more data than needed for completion; r=msucan

Comment 3

[Panos Astithas (he/him) [:past] (please ni?)]

I'm pretty sure I tried the web console on Windows in the past couple of years and I didn't see this, so it's unlikely that bug 790016 is at fault here. That said, I'm now testing Windows in a VM, which may affect this.

Comment 4

[noitidart]

I think it might be my AMD 7850K processor.

Comment 5

[Panos Astithas (he/him) [:past] (please ni?)]

How fast is that? The other day Gijs was reporting the same slowness, but on a Surface which is rather underpowered.

Comment 6

[noitidart]

(In reply to Panos Astithas [:past] from comment #5)
> How fast is that? The other day Gijs was reporting the same slowness, but on
> a Surface which is rather underpowered.

3.69ghz quad core lol
it might just be amd stuff is different, not about the speed.

Comment 7

[Nicolas Chevobbe [:nchevobbe][PTO - back October 26]]

Hello noitidart. I know it's been a long time, but could you tell us if you're still experiencing this slowness ?
The console went was refactored quite a bit and things might have changed here.

Comment 8

[Nicolas Chevobbe [:nchevobbe][PTO - back October 26]]

Closing for now. We'll reopen if the reporter says they still experience this.