When I started using a MacBook Pro laptop running OS X Yosemite (10.10.5) today, I found that the Google Chrome browser (version 35.0.1916.153) was slow to respond when I attempted to access web pages. When I checked the system CPU usage from a Terminal tab using the top command, I found a Google Chrome process with process identififer (PID) 29634 was consuming about 90% of the CPU cycles.
$ top -o cpu Processes: 318 total, 7 running, 11 stuck, 300 sleeping, 2181 threads 10:57:11 Load Avg: 3.82, 6.20, 6.94 CPU usage: 35.23% user, 5.81% sys, 58.95% idle SharedLibs: 16M resident, 10M data, 0B linkedit. MemRegions: 187449 total, 7337M resident, 52M private, 1115M shared. PhysMem: 16G used (2532M wired), 19M unused. VM: 703G vsize, 1063M framework vsize, 11083768(0) swapins, 16907853(0) swapouts Networks: packets: 17956740/12G in, 13426851/3518M out. Disks: 13779844/398G read, 14840307/588G written. PID COMMAND %CPU TIME #TH #WQ #PORT MEM PURG CMPRS PGRP 29634- Google Chrom 89.2 23:16:01 13 0 85 817M+ 0B 638M- 515 28991- Google Chrom 30.7 23:37:36 10/1 0 78 124M+ 0B 344M- 515 0 kernel_task 20.6 32:32:35 104/10 0 2 1685M+ 0B 0B 0 30147- Google Chrom 14.7 18:55:10 10 0 78 47M+ 0B 87M 515 609- Google Chrom 12.9 13:55:01 4/1 0 93 153M+ 0B 859M- 515 75040- Google Chrom 12.7 09:26:48 19 0 89 100M+ 0B 523M- 515 46990- Google Chrom 12.4 16:15:41 10 0 78 53M+ 0B 194M- 515 55854- Google Chrom 11.1 12:09:27 10 0 78 42M 0B 100M 515 79850- Google Chrom 11.0 02:49:58 10 0 78 44M 0B 91M 515 55744- Google Chrom 10.5 12:19:13 20 0 92 31M+ 0B 148M- 515 79625- Google Chrom 10.2 06:55:52 11 0 82 95M+ 0B 442M- 515 83785- Google Chrom 9.1 04:23:07 10/1 0 78 35M+ 0B 135M- 515 84883- Google Chrom 9.1 04:30:16 10/1 0 78 36M- 0B 71M- 515 190 WindowServer 8.8 14:29:00 5 1 1590- 44M- 8952K 628M 190 60247- Google Chrom 8.0 05:43:24 11/1 0 81 91M+ 0B 247M- 515
You can determine what web pages a Google Chrome process has open by putting
chrome://memory in the Chrome address bar. Once you've identified
the relevant Chrome window/tabs associated with a process, you can close the
tab, or tabs, that may be associated with the process to reduce CPU usage.
If needed, you can also suspend a process
temporarily under OS X with the kill command.
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