Find and kill runaway Safari Networking process

Safari networking can go to 100%.

References:

https://discussions.apple.com/thread/8580915 (100% CPU)

https://discussions.apple.com/thread/8608985 (1 full CPU)

By using Applications > Utilities > Activity Monitor, I was able to find and kill a runaway process. After that, the CPU usage for Safari Networking went down to a reasonable value.

In Activity Monitor

1. Go to the Memory tab.
2. Sort alphabetically on Process Name.
3. There will be several Safari Networking processes. One of them will be using a surprisingly large number of ports.
4. Select that process and use the X control in the upper left of the Activity Monitor window to force that process to quit.

The premises that would make this is a safe fix is:

• When working properly, a Safari Networking process does not consume 100% of CPU.
• A Safari Networking process that consumes 100% of CPU is not doing irreplaceable work.
• Safari Networking is a robust service that will simply restart any processes it needs if one of them is killed.

So far, so good.