1725580 - console.log is incredibly slow

Status: NEW

(DevTools :: Console, defect, P2)

Description

[wevow74629]

Attachment: pertest.js

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0

Steps to reproduce:

Run the attached script in Firefox with Console open. Script logs 0 to 5000 in a console.

Also test the same with Chrome.

Actual results:

When console is closed, Chrome & Firefox almost take the same amount to execute.

When console is open, Firefox takes around 10X more time & Chrome only 2X.

Firefox feels incredibly slow & sometimes often freezes with even bigger frequency of logs.

Expected results:

Console should be faster, development of some apps & games require lots of console logs to develop & Firefox is simply unusable for those cases.

So user have to use Chrome for development.

Comment 1

[wevow74629]

(In reply to wevow74629 from comment #0)

Created attachment 9236141 [details] pertest.js
Version 90.

Steps to reproduce:

Run the attached script in Firefox with Console open. Script logs 0 to 5000 in a console.
Also test the same with Chrome.

Actual results:

When console is closed, Chrome & Firefox almost take the same amount to execute.
When console is open, Firefox takes around 10X more time & Chrome only 2X.

Firefox feels incredibly slow & sometimes often freezes with even bigger frequency of logs.

Expected results:

Console should be faster, development of some apps & games require lots of console logs to develop & Firefox is simply unusable for those cases. So user have to use Chrome for development.