High CPU processor usage with firefox-v40,gecko-0.23 and selenium-v3.14.0

[siddhant42]

description:: I am using selenium with firefox-v61 and geckodriver-0.23 for crawling. I am running it with heavy scale -around 50 simultaneous processes of firefox every time in a new window. but firefox is using very high processor usage- around 3 processes(including 2 child-Id) for every site opening and rendering . And my total cpu usage of machine is becoming around 60 to 70. I am opening every time a new firefox instance to open the site due to some project criteria.

Earlier i used the older version of firefox-v40 and for opening a site only one process(no child-Id) is used per site for opening in firefox.And total processor usage in that case was around 25 to 30. Now i have upgraded selenium and firefox in my project and due to this issue i am not able to go ahead with my project. Can you please let me know how can i overcome the process usage of firefox with such scenario?

Detailed steps to reproduce the behavior: If you open mulitple firefox with v40 and v61, you can see the difference in processor usage.

Expected behavior: The processor usage should be same or somewhat more than what it used to be at firefox-v40, but not such a heavy difference.

Script: my $max_processes = 50; my $disply = 100 + (int(rand 30) * 3); my $ROOT_PATH = /home/developer/crawler; my $JSpiderVersion = v4.1.0; my cmd="xvfb-run -n $disply -a -s '-screen 0 1024x768x24' $ROOT_PATH/jdk1.8.0_181/bin/java -Xmx2g -XX:ParallelGCThreads=2 -Dwebdriver.gecko.driver=$ROOT_PATH/etc/geckoDriver_0.23/geckodriver -cp $ROOT_PATH/release/$JSpiderVersion/JSpider-$JSpiderVersion.jar com.naukri.crawler.driver.Srp --config $ROOT_PATH/release/$JSpiderVersion/etc/crawler.srp.config";

Environment::

OS: ubunt 18.0.4 Browser: firefox Browser version: 61,0 Browser Driver version: GeckoDriver 0.23 Language Bindings version: Java 8 Selenium Grid version (if applicable): 3.14.0

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