Displaying 3 results from an estimated 3 matches for "dogroup".
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nogroup
2012 Dec 24
1
How to ensure -O3 on Win64
...-O2 still appears in winbuilder's install.out (after -O3, and I
believe the last -O is the one that counts) :
gcc -m64 -I"D:/RCompile/recent/R-2.15.2/include" -DNDEBUG
-I"d:/Rcompile/CRANpkg/extralibs215/local215/include" -O3 -O2 -Wall
-std=gnu99 -mtune=core2 -c dogroups.c -o dogroups.o
How can I ensure that data.table is compiled with -O3 on Win64?
Thanks, Matthew
2010 Apr 21
2
suggestion how to use memcpy in duplicate.c
...= fun(from), *__tp__ = fun(to); \
for (__i__ = 0; __i__ < __n__; __i__++) \
__tp__[__i__] = __fp__[__i__]; \
} \
Could that loop be replaced by the following ?
else { \
memcpy((char *)DATAPTR(to), (char *)DATAPTR(from), __n__*sizeof(type)); \
}\
In the data.table package, dogroups.c uses this technique, so the principle
is tested and works well so far.
Are there any road blocks preventing this change, or is anyone already
working on it ? If not then I'll try and test it (on Ubuntu 32bit) and
submit patch with timings, as before. Comments/pointers much appreciated....
2012 Feb 23
1
segfault when using data.table package in conjunction with foreach
...ired package: data.table
Loading required package: data.table
data.table 1.7.10 For help type: help("data.table")
data.table 1.7.10 For help type: help("data.table")
*** caught segfault ***
address 0x2ae93df90000, cause 'memory not mapped'
Traceback:
1: .Call("dogroups", x, xcols, o__, f__, len__, jsub, SDenv, testj,
byretn, byval, i, as.integer(icols), i[1, ivars, with = FALSE],
if (length(ivars)) paste("i.", ivars, sep = ""), is.na(nomatch),
verbose, PACKAGE = "data.table")
2: `[.data.table`(DT, , sum(sharing), by = "...