Closed Bug 1057202 Opened 10 years ago Closed 4 years ago

Codemirror repeatedly slowing down the browser.

Categories

(DevTools :: General, defect)

Product:
DevTools
Component:
General
Version:
31 Branch
Platform:
x86_64
Linux
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

(Not tracked)

Status:
RESOLVED INVALID

People

(Reporter: lb1.3, Unassigned)

Details

(Keywords: perf)

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 (Beta/Release) Build ID: 20140715214327 Steps to reproduce: Opened a certain page with the Devtools running Actual results: I always got several script-not-responding messages caused by codemirror, including: chrome://browser/content/devtools/codemirror/codemirror.js:1432 chrome://browser/content/devtools/codemirror/codemirror.js:6416 chrome://browser/content/devtools/codemirror/codemirror.js:480 chrome://browser/content/devtools/codemirror/codemirror.js:3445 chrome://browser/content/devtools/codemirror/codemirror.js:3445 Expected results: It shouldn't repeatedly have problems like this just opening a page. The lines it's taking a long time on are related to scrolling to a certain position, aligning horizontally, and other things that definitely shouldn't be happening when the page is opened and the Console is open.
Can you provide a test page where you see this happening?
Component: Untriaged → Developer Tools
Flags: needinfo?(lb1.3)
Any simple page, this will do: <html> <body> <div> Hello 1. open the page. 2. Ctrl+U, look at it, move source window away 3. F12, look at console. 4. Edit this file, change text. 5. Reload the page, Ctrl+U and notice it shows the OLD source instead of the new text that is actually shown on the page. </div> </body></html>
Flags: needinfo?(lb1.3)
Keywords: perf
Product: Firefox → DevTools

There is no specific test case (nor activity) I could follow.

In any case, Code-Mirror slowness is known problem and there are bug reports covering this issue (e.g. bug 1655721, in the Network panel)

Honza

Status: UNCONFIRMED → RESOLVED
Closed: 4 years ago
Resolution: --- → INVALID
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