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2023 Dec 11
1
Partial matching performance in data frame rownames using [
Dear all,
I have seen that others have discussed the partial matching behaviour of
data.frame[idx,] in the past, in particular with respect to unexpected
results sets.
I am aware of the fact that one can work around this using either
match() or switching to tibble/data.table or similar altogether.
I have a different issue with the partial matching, in particular its
performance when used on
2023 Dec 13
1
Partial matching performance in data frame rownames using [
...ong time, it ought to be
> interruptible. Here's a patch that passes make check-devel:
>
> --- src/main/unique.c (revision 85667)
> +++ src/main/unique.c (working copy)
> @@ -1631,6 +1631,7 @@
> }
> }
>
> + unsigned int ic = 9999;
> if(nexact < n_input) {
> /* Second pass, partial matching */
> for (R_xlen_t i = 0; i < n_input; i++) {
> @@ -1642,6 +1643,10 @@
> mtch = 0;
> mtch_count = 0;
> for (int j = 0; j < n_target; j++) {
> + if (!--ic) {
> + R_CheckUserInterrupt();
> + i...
2008 Jan 14
1
Problems with forms
...%"><span class="n_Label">Produkttitel
*</span></td>
<td class="n_FormLeft" width="40%">
<div id="DivTitleLang" name="DivTitleLang" style="display: block;">
<input type="text" class="n_Input" name="Title" id="Title" size="60"
maxlength="60" value="Papier A4, hochweiss, 1 Blatt">
</div>
</td>
<td class="n_FormLink" width="9%"><hr></td>
<td class="n_FormRight">&am...
2011 Apr 05
1
[LLVMdev] [GSoC] Optimizing for size
Hi all,
I'm interested in adding code size optimizations as a GSoC project. This is
necessary when compiling for embedded devices, where LLVM should optimize for
size even at the expense of speed. I'm still working on my proposal, but I'd
like some advice on the technical parts and overall project plan.
First, I would add a way to determine which parts of the code should be optimized