User profile for user: Grigou
Grigou Author
User level: Level 1
10 points

Safari Networking process uses 1 full CPU

Very similar to this previous (old unresolved) question, my Safari application uses ~100% CPU for quite a long time until I exit Safari completely (even closing all tabs did not help).


The process Safari Networking is responsible for it. I cannot figure out what is causing it. I checked in the log Console and found these logs: popping a lot (~280 per sec):


com.apple.WebKit.Networking (CFNetwork)

Task <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 228


Always with same PID, but after some time it will change Thread ID.


Here is an extract when it changes the connection / thread:


par défaut08:56:31.312705 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 208
par défaut08:56:31.316538 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 208
par défaut08:56:31.320479 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 208
par défaut08:56:31.324650 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 208
par défaut08:56:31.328417 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 208
par défaut08:56:31.332199 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 208
par défaut08:56:31.335970 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 208
par défaut08:56:31.340022 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 208
erreur08:56:31.341307 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC Read Status [208:0x7feb10314b90]: 1:57
par défaut08:56:31.341362 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TCP Conn Event [208:0x7feb10314b90]: 2
erreur08:56:31.341380 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC Read Status [208:0x7feb10314b90]: 1:57
erreur08:56:31.341402 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC Read Status [208:0x7feb10314b90]: 1:57
par défaut08:56:31.341452 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TCP Conn Cancel [208:0x7feb10314b90]
par défaut08:56:31.341904 +01000x4b58ea44594com.apple.WebKit.Networking[209 <private> stream, pid: 44594, url: https://collector-pxpmp8ilui.perimeterx.net/api/v1/collector/noCors?payload=W3si dCI6IlBYNTc1IiwiZCI6eyJQWDgyIjoiMTYyOHgyNDgiLCJQWD, tls] cancelled
[209.1 79C657D7-B427-46D0-B03F-90A93D504F73 <private>.51127<-><private>]
Connected Path: satisfied (Path is satisfied), interface: en0, ipv4, dns
Duration: 240.285s, DNS @0.000s took 0.003s, TCP @0.004s took 0.001s, TLS took 0.065s
bytes in/out: 6144/839, packets in/out: 7/7, rtt: 0.000s, retransmitted packets: 0, out-of-order packets: 0
par défaut08:56:31.342220 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TCP Conn Destroyed [208:0x7feb10314b90]
par défaut08:56:31.342790 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC Enabling TLS [228:0x7feb08111c80]
par défaut08:56:31.344467 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TCP Conn Start [228:0x7feb08111c80]
par défaut08:56:31.344643 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> setting up Connection 228
par défaut08:56:31.344672 +01000x4b58ea44594com.apple.WebKit.Networking[229 <private> <private>] start
par défaut08:56:31.350434 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TLS Event [228:0x7feb08111c80]: 1, Pending(0)
par défaut08:56:31.382154 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TLS Event [228:0x7feb08111c80]: 2, Pending(0)
par défaut08:56:31.382779 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TLS Event [228:0x7feb08111c80]: 11, Pending(0)
par défaut08:56:31.383129 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TLS Event [228:0x7feb08111c80]: 12, Pending(0)
par défaut08:56:31.383164 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TLS Event [228:0x7feb08111c80]: 14, Pending(0)
par défaut08:56:31.389892 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TLS Trust Result [228:0x7feb08111c80]: 0
par défaut08:56:31.403000 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TLS Event [228:0x7feb08111c80]: 20, Pending(0)
par défaut08:56:31.403043 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TCP Conn Connected [228:0x7feb08111c80]: Err(16)
par défaut08:56:31.403262 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TCP Conn Event [228:0x7feb08111c80]: 1
par défaut08:56:31.403338 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TCP Conn Event [228:0x7feb08111c80]: 8
par défaut08:56:31.403356 +01000x4b58ea44594com.apple.WebKit.NetworkingTIC TLS Handshake Complete [228:0x7feb08111c80]
par défaut08:56:31.406233 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 228
par défaut08:56:31.410853 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 228
par défaut08:56:31.415460 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 228
par défaut08:56:31.419575 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 228
par défaut08:56:31.423497 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 228
par défaut08:56:31.427458 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 228
par défaut08:56:31.431201 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 228
par défaut08:56:31.435175 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 228
par défaut08:56:31.439082 +01000x4b58ea44594com.apple.WebKit.NetworkingTask <BABB2876-1B1A-4E4C-9AB4-7E88CEF61716>.<42> now using Connection 228


What is my Safari doing?

Posted on Oct 31, 2018 1:42 AM

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3 replies
User profile for user: Eric Root
Eric Root
User level: Level 10
685,909 points

Oct 31, 2018 8:41 AM in response to Grigou

Try setting up another admin user account to see if the same problem continues. Please post back on whether or not this worked. Also try the Safe Mode. Please post back on whether or not this worked.


Isolating an issue by using another user account


Safe Mode - About


If it works in the Safe Mode, try running this program when booted normally and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.

Etrecheck – System Information

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User profile for user: Grigou
Grigou Author
User level: Level 1
10 points

Nov 6, 2018 11:05 PM in response to Eric Root

The issue is that I have this only from time to time. I had it again today, but it seams I could identify the faulty web page / tab in Safari this time (lira Atlassian preview of I task in the scrum board apparently)... I'll check it once more next time I have it.


The testing trick with another profile is not easy for me to use as I am working with this Mac, and would not like to recreate all my settings in another place and work for several days before seeing if it is reproduced or not...

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Safari Networking process uses 1 full CPU

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