R Under development (unstable) (2026-01-24 r89326 ucrt) -- "Unsuffered Consequences"
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> # Valgrind developers say that performing work after fork() without
> # exec() is problematic for Valgrind. frollapply() uses
> # parallel::mcparallel(), which causes Valgrind to run
> # Rstd_ReadConsole() incorrectly.
> Sys.setenv(OMP_THREAD_LIMIT =
+   if (grepl("valgrind", Sys.getenv("LD_PRELOAD"))) "1" else Sys.getenv("OMP_THREAD_LIMIT", "2")
+ )
> require(data.table)
Loading required package: data.table

Attaching package: 'data.table'

The following object is masked from 'package:base':

    %notin%

> test.data.table(script="froll.Rraw")
getDTthreads(verbose=TRUE):
  OpenMP version (_OPENMP)       201511
  omp_get_num_procs()            48
  R_DATATABLE_NUM_PROCS_PERCENT  unset (default 50)
  R_DATATABLE_NUM_THREADS        unset
  R_DATATABLE_THROTTLE           unset (default 1024)
  omp_get_thread_limit()         2
  omp_get_max_threads()          48
  OMP_THREAD_LIMIT               2
  OMP_NUM_THREADS                unset
  RestoreAfterFork               true
  data.table is using 2 threads with throttle==1024. See ?setDTthreads.
test.data.table() running: D:/RCompile/CRANincoming/R-devel/lib/data.table/tests/froll.Rraw.bz2

Sun Jan 25 05:57:33 2026  endian==little, sizeof(long double)==16, capabilities('long.double')==TRUE, longdouble.digits==64, sizeof(pointer)==8, TZ==unset, Sys.timezone()=='Europe/Berlin', Sys.getlocale()=='LC_COLLATE=C;LC_CTYPE=German_Germany.utf8;LC_MONETARY=C;LC_NUMERIC=C;LC_TIME=C', l10n_info()=='MBCS=TRUE; UTF-8=TRUE; Latin-1=FALSE; codepage=65001; system.codepage=65001', getDTthreads()=='OpenMP version (_OPENMP)==201511; omp_get_num_procs()==48; R_DATATABLE_NUM_PROCS_PERCENT==unset (default 50); R_DATATABLE_NUM_THREADS==unset; R_DATATABLE_THROTTLE==unset (default 1024); omp_get_thread_limit()==2; omp_get_max_threads()==48; OMP_THREAD_LIMIT==2; OMP_NUM_THREADS==unset; RestoreAfterFork==true; data.table is using 2 threads with throttle==1024. See ?setDTthreads.', .libPaths()=='D:/temp/2026_01_25_05_55_16_26999/RtmpOWHw3L/RLIBS_14e6c55b247d6','D:/RCompile/recent/R/library', zlibVersion()==1.3.1 ZLIB_VERSION==1.3.1
10 longest running tests took 1s (100% of 1s)
     ID time nTest
1: 6010 0.47   246
2: 6000 0.29   543
3: 6004 0.15    68
4: 6006 0.08    98
5: 6001 0.07   272
6: 6015 0.03    71
All 1298 tests (last 6015.91) in tests/froll.Rraw.bz2 completed ok in 2.050s elapsed (2.050s cpu)
> test.data.table(script="frollBatch.Rraw", optional=TRUE)
> 
> proc.time()
   user  system elapsed 
   2.25    0.06    2.28