>>>>> "HenrikB" == Henrik Bengtsson (max 7Mb) <[EMAIL PROTECTED]>
>>>>> on Fri, 5 May 2006 11:58:19 -0700 writes:
HenrikB> Hi,
HenrikB> I noticed some time ago that, for instance, named vectors that are
HenrikB> really makes str() really slow when displaying the names attribute.
HenrikB> I don't know exactly when this started, but it
HenrikB> wasn't the case say 1-2 years ago. Example (on a WinXP 1.8GHz):
Thank you, Henrik, for the note.
Indeed, str() is unnecessary slow for long character vectors in
general, not just when they are names(); and Rprof() +
Rprofsummary() quickly reveal were the culprits lie.
This shouldn't be too hard to improve, I'm having a look.
Martin Maechler, ETH Zurich
>> s <- 1:1000; names(s) <- s
>> system.time(str(s))
HenrikB> Named int [1:1000] 1 2 3 4 5 6 7 8 9 10 ...
HenrikB> - attr(*, "names")= chr [1:1000] "1" "2" "3" "4" ...
HenrikB> [1] 0.08 0.00 0.09 NA NA
>> s <- 1:100000; names(s) <- s
>> system.time(str(s))
HenrikB> Named int [1:100000] 1 2 3 4 5 6 7 8 9 10 ...
HenrikB> - attr(*, "names")= chr [1:100000] "1" "2" "3" "4" ...
HenrikB> [1] 8.82 0.00 9.11 NA NA
HenrikB> I looks like all strings elements are processed although only the
HenrikB> first few are displayed.
HenrikB> Cheers
HenrikB> Henrik
HenrikB> ______________________________________________
HenrikB> R-devel@r-project.org mailing list
HenrikB> https://stat.ethz.ch/mailman/listinfo/r-devel
>>>>> "HenrikB" == Henrik Bengtsson (max 7Mb) <[EMAIL PROTECTED]>
>>>>> on Fri, 5 May 2006 11:58:19 -0700 writes:
HenrikB> Hi, I noticed some time ago that, for instance,
HenrikB> named vectors that are really makes str() really
HenrikB> slow when displaying the names attribute. I don't
HenrikB> know exactly when this started, but it wasn't the
HenrikB> case say 1-2 years ago. Example (on a WinXP
HenrikB> 1.8GHz):
>> s <- 1:1000; names(s) <- s system.time(str(s))
HenrikB> Named int [1:1000] 1 2 3 4 5 6 7 8 9 10 ... -
HenrikB> attr(*, "names")= chr [1:1000] "1" "2" "3" "4" ...
HenrikB> [1] 0.08 0.00 0.09 NA NA
>> s <- 1:100000; names(s) <- s system.time(str(s))
HenrikB> Named int [1:100000] 1 2 3 4 5 6 7 8 9 10 ... -
HenrikB> attr(*, "names")= chr [1:100000] "1" "2" "3" "4"
HenrikB> ... [1] 8.82 0.00 9.11 NA NA
HenrikB> I looks like all strings elements are processed
HenrikB> although only the first few are displayed.
HenrikB> Cheers
HenrikB> Henrik
HenrikB> ______________________________________________
HenrikB> R-devel@r-project.org mailing list
HenrikB> https://stat.ethz.ch/mailman/listinfo/r-devel
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