firefox: lots of calls to gettimeofday()

[Tom London]

Running latest rawhide, targeted/enforcing.

I've noticed for the past few days that after a while, firefox-bin
begins to consume lots of cycles: currently over 87 minutes worth on a
machine I booted a few hours ago.

If I 'strace -p' to firefox-bin, I get endless supply of:
gettimeofday({1139262540, 344672}, NULL) = 0
gettimeofday({1139262540, 344832}, NULL) = 0
gettimeofday({1139262540, 344987}, NULL) = 0
gettimeofday({1139262540, 345562}, NULL) = 0
gettimeofday({1139262540, 347203}, NULL) = 0
gettimeofday({1139262540, 347355}, NULL) = 0
gettimeofday({1139262540, 347730}, NULL) = 0
gettimeofday({1139262540, 347887}, NULL) = 0
gettimeofday({1139262540, 348080}, NULL) = 0
gettimeofday({1139262540, 349651}, NULL) = 0
gettimeofday({1139262540, 349811}, NULL) = 0
gettimeofday({1139262540, 349957}, NULL) = 0
gettimeofday({1139262540, 350270}, NULL) = 0
gettimeofday({1139262540, 350425}, NULL) = 0
gettimeofday({1139262540, 350571}, NULL) = 0

running as fast as my window can run.

Every now and then I get a sprinkling of:
read(5, "\372", 1)                      = 1
ioctl(3, FIONREAD, [0])                 = 0
gettimeofday({1139262717, 435932}, NULL) = 0
poll([{fd=3, events=POLLIN}, {fd=9, events=POLLIN}, {fd=13,
events=POLLIN|POLLPRI}, {fd=43, events=POLLIN}, {fd=5, events=POLLIN,
revents=POLLIN}], 5, 116) = 1
gettimeofday({1139262717, 444588}, NULL) = 0

mixed in.

Is this 'normal'?  Anyone else seeing something like this?

tom
--
Tom London