I've been having performance issues in Safari as of late. When I check the activity monitor, it's using an absurd amount of system memory over time (to the point where there's none available). As soon as I quit and restart Safari, everything goes back to normal, but the issue persists again over time. I realize that you should usually let the system do its job, but the performance issues make me wonder if there's more to the problem than on the surface. Does anyone have any suggestions, other than restarting safari completely?