Shandrew (shandrew) wrote,
Shandrew
shandrew

Zombie javascript banished

Discovered by process of elimination the culprit behind the idle browser page CPU-eating woes. The javascript from "sharethis.{com,net}" causes "idle" pages in Chrome to eat around 6% CPU on my old Macbook Pro.

Additional tabs loading the same javascript consume an additional 6% CPU if they are in a separate process, but a bit less if in the same process.

Many blogs (including LJ) use sharethis. I blackholed w.sharethis.net w.sharethis.com wd.sharethis.net wd.sharethis.com and my CPU and battery are happier.

There's also some strange runaway CPU situation caused by an NPR page that's left open for a long while. All of the sudden without any specific user action the CPU usage of that process will shoot to 100%, fans shoot to rocket speed, not stopping until i close the NPR tab.
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