Merge pull request datashield#548 from StuartWheater/v6.3.1-RC4-dev

 Update with 'StuartWheater/datashield:v6.3.1-RC4-dev'

Author: StuartWheater

tests/testthat/perf_files/default_perf_profile.csv

@@ -1,14 +1,14 @@
 "refer_name","rate","lower_tolerance","upper_tolerance"
-"conndisconn::perf::simple0","0.1050","0.5","2"
-"ds.abs::perf::0","3.896","0.5","2"
-"ds.asInteger::perf:0","3.550","0.5","2"
-"ds.asList::perf:0","8.040","0.5","2"
-"ds.asNumeric::perf:0","3.577","0.5","2"
-"ds.assign::perf::0","6.739","0.5","2"
-"ds.class::perf::combine:0","8.171","0.5","2"
-"ds.colnames::perf:0","6.292","0.5","2"
-"ds.exists::perf::combine:0","16.33","0.5","2"
-"ds.length::perf::combine:0","16.08","0.5","2"
-"ds.mean::perf::combine:0","16.08","0.5","2"
-"ds.mean::perf::split:0","15.83","0.5","2"
-"void::perf::void::0","36510.0","0.5","2"
+"conndisconn::perf::simple0","0.229","0.5","2"
+"ds.abs::perf::0","1.796","0.5","2"
+"ds.asInteger::perf:0","1.538","0.5","2"
+"ds.asList::perf:0","3.061","0.5","2"
+"ds.asNumeric::perf:0","1.548","0.5","2"
+"ds.assign::perf::0","3.556","0.5","2"
+"ds.class::perf::combine:0","3.149","0.5","2"
+"ds.colnames::perf:0","2.584","0.5","2"
+"ds.exists::perf::combine:0","7.138","0.5","2"
+"ds.length::perf::combine:0","6.385","0.5","2"
+"ds.mean::perf::combine:0","5.982","0.5","2"
+"ds.mean::perf::split:0","6.923","0.5","2"
+"void::perf::void::0","41810.0","0.5","2"