Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/19290
> 5 min: this is mildly concerning, is it possible this is caused by new
checks in lintr? perhaps we could exclude them or something?
1.0.1 miss the linters below (vs master):
```
nonportable_path_linter: check that file.path() is used to construct safe
and portable paths.
pipe_continuation_linter: Check that each step in a pipeline is on a new
line, or the entire pipe fits on one line.
extraction_operator_linter: check that the [[ operator is used when
extracting a single element from an object, not [ (subsetting) nor $
(interactive use).
implicit_integer_linter: check that integers are explicitly typed using the
form 1L instead of 1.
object_name_linter: check that object names conform to a single naming
style, e.g. snake_case or lowerCamelCase.
semicolon_terminator_linter: check that no semicolons terminate statements.
todo_comment_linter: check that the source contains no TODO comments
(case-insensitive).
T_and_F_symbol_linter: avoid the symbols T and F (for TRUE and FALSE).
undesirable_function_linter: report the use of undesirable functions, e.g.
options or sapply and suggest an alternative.
undesirable_operator_linter: report the use of undesirable operators, e.g.
::: or <<- and suggest an alternative.
unneeded_concatenation_linter: check that the c function is not used
without arguments nor with a single constant
```
I manually disabled the linters above but the elapsed time looks almost the
same. So, I think some existing linters were slowed down in the master - I
tried to disable everything except for each linter -
https://gist.github.com/HyukjinKwon/1f852bcdcc2a13f396dfd2d6a88bea16
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