606894 - High CPU usage when downloading a large file

Status: RESOLVED DUPLICATE of bug 397424

(Firefox :: General, defect)

Description

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User-Agent:       Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b6) Gecko/20100101 Firefox/4.0b6
Build Identifier: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b6) Gecko/20100101 Firefox/4.0b6

Downloading of xcode_3.2.4_and_ios_sdk_4.1dmg (which is over 2GB) CPU usage to over 100% on Snow Leopard (10.6.4) on a MacbookPro.

Reproducible: Didn't try

Steps to Reproduce:
1. Download ios SDK with xcode

Comment 1

[Jean Pierre Wenzel]

I experience the same issue. Downloading recordings from my DVR over http, about 3–5 GB. CPU load on a Core 2 Duo MacBook Pro is quite high.

This is reproducible easily: just pick a download of a large file.

Comment 2

[Jean Pierre Wenzel]

Attachment: htop output when CPU load is high during downloading a large file

Comment 3

[Jean Pierre Wenzel]

BTW: I can reproduce this behavior on
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b9pre) Gecko/20110108 Firefox/4.0b9pre

Comment 4

[Jean Pierre Wenzel]

This issue might not be limited to Firefox only; I see about 40 % CPU usage (on a Core 2 Duo CPU) in Safari.app when downloading a 4 GB file at 3 MB/s.

Comment 5

[Zibi Braniecki [:zbraniecki][:gandalf]]

thanks for reporting! It's actually a duplicate of bug 397424. Let's resolve it there :)