[R] help.start() caused high CPU loading

[Jinsong Zhao]

Hi there,

After calling help.start(), I noticed that CPU loading is up to about 
25% (my CPU is core i5 with 4 core). In the out html page, if I click 
"Packages", the CPU loading may be up to 75% or much higher. After 
closing the browser, the CPU loading does not drop.

If I just use ?plot to open a specific help page, the CPU loading is not 
change dramatically. However, if I click the package name (base or 
graphics package in this example) in the help page to open the index 
page of the corresponding package, then the CPU loading will increase to 
more than 75%.

I do not know if this phenomenon could be reproduced... And I do not 
know how to trace the detailed information.

Best,
Jinsonng

 > sessionInfo()
R version 4.0.0 (2020-04-24)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18363)

Matrix products: default

locale:
[1] LC_COLLATE=Chinese (Simplified)_China.936
[2] LC_CTYPE=Chinese (Simplified)_China.936
[3] LC_MONETARY=Chinese (Simplified)_China.936
[4] LC_NUMERIC=C
[5] LC_TIME=Chinese (Simplified)_China.936

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

loaded via a namespace (and not attached):
[1] compiler_4.0.0 tools_4.0.0