Comment 57 for bug 109943

Revision history for this message
In , dvo (mueller8) wrote :

Thanks Wayne for bringing attention back also to this bug.

I can confirm that the bug still exists with the latest released TB version 31.3.0 with a cpu usage increase of about 12-13% on my Macbook Air. As I wrote recently in response on your request regarding the (likely related) bug 919485, unfortunately I cannot afford the time to install the trunk version and use profiling tools. Yet anyone interested could do for himself easily, since this bug can be reproduced in a straightforward way: put any garbage IP address as e.g. the IMAP (or POP or SMTP) server name and try receiving (or sending, respectively) emails.

I suspect that this waste of CPU (and battery on mobile devices!) is due to the same careless chunk of code performing a busy loop somewhere deep in Mozilla's TCP client connect implementation.

BTW, the title of this bug report is misleading, as it is too narrow: the misbehavior also occurs without any progress bar being shown, e.g., when trying to fetch emails.