R Under development (unstable) (2025-12-20 r89211 ucrt) -- "Unsuffered Consequences"
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> Sys.setenv(OMP_THREAD_LIMIT = 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="mergelist.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/mergelist.Rraw.bz2

Sun Dec 21 22:03:43 2025  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/2025_12_21_22_00_16_7524/RtmpYtqpT5/RLIBS_11f442263fd0','D:/RCompile/recent/R/library', zlibVersion()==1.3.1 ZLIB_VERSION==1.3.1
10 longest running tests took 0s (65% of 1s)
     ID time nTest
 1: 291 0.08     6
 2:  21 0.08    64
 3:  27 0.07    64
 4: 121 0.07    54
 5:  24 0.06    64
 6:  28 0.06    64
 7: 103 0.06    48
 8:  26 0.06    64
 9: 102 0.06    44
10:  22 0.05    64
All 1022 tests (last 302.2) in tests/mergelist.Rraw.bz2 completed ok in 1.580s elapsed (1.540s cpu)
> 
> proc.time()
   user  system elapsed 
   1.71    0.09    1.79