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

[Abby Spurdle]

What's the benchmark?

I (still) have Windows 10 x64.
Opening the task manager, causes the CPU to jump to over 90%.

In regards to the CPU usage remaining high:
(1) Are you running R in a standard way?
(2) If (1) true, is R idle (i.e. waiting for user input)?
(3) If (2) true, how much CPU is R using?
(4) If (3) is zero, what processes are using the CPU the most?

If (1) is false, it's not R's fault.
If (1) is true and (2) is false, then I don't know, that would be interesting...
If (1) and (2) are true and (3) is high, then that would be a bug in R.

If (4) is processes other than R, it's also not R's fault.
But if you provide information, someone here maybe able to offer advise...


On Mon, Apr 27, 2020 at 7:51 PM Jinsong Zhao <jszhao using yeah.net> wrote:
>
> 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
>
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