diff --git a/.circleci/config.yml b/.circleci/config.yml
index ec6d40e9..7ee4e084 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -26,22 +26,8 @@ jobs:
       - run:
           command: |
               echo "options(Ncpus=4)" >> ~/.Rprofile
-              sudo Rscript -e "install.packages('RANN', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('stringr', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('lme4', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('dplyr', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('reshape2', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('polycor', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('splines', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('gamlss', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('gamlss.dist', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('mice', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('childsds', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('xml2', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('covr', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('devtools', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('DSI', dependencies=TRUE)"
-              sudo Rscript -e "install.packages('DSLite', dependencies=TRUE)"
+
+              sudo R -q -e "options(repos=c(CRAN=paste0('https://packagemanager.posit.co/cran/__linux__/', system('lsb_release -cs', intern=TRUE), '/latest')), HTTPUserAgent=sprintf('R/%s R (%s)', getRversion(), paste(getRversion(), R.version\$platform, R.version\$arch, R.version\$os)), Ncpus=4); install.packages(c('devtools','RANN','stringr','lme4','dplyr','reshape2','polycor','splines','gamlss','gamlss.dist','mice','data.table','childsds'), dependencies=TRUE)"
       - run:
           command: |
               sudo Rscript -e 'library(covr); covr::codecov(token = "'$CODECOV_TOKEN'")'
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 94c767e9..77679f06 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -27,8 +27,7 @@ variables:
   branchName:  $(Build.SourceBranchName)
   test_filter: '*'
   _r_check_system_clock_: 0
-  PERF_PROFILE: 'azure-pipeline'
-
+  perf.profile: 'azure-pipeline'
 
 
 #########################################################################################
@@ -50,13 +49,13 @@ schedules:
     displayName: Weekly build - latest release
     branches:
       include:
-      - 6.3.4
+      - 6.3.5
     always: true
   - cron: "0 1 * * *"
     displayName: Nightly build - development branchs
     branches:
       include:
-      - v6.3.5-dev
+      - v6.3.6-dev
       - v6.4.0-dev
       - v7.0.0-dev
     always: true
@@ -184,7 +183,7 @@ jobs:
       # R output and messages are redirected by sink() to test_console_output.txt
       # junit reporter output is to test_results.xml
 
-      sudo R -q -e '
+      sudo env PERF_PROFILE=$PERF_PROFILE R -q -e '
         library(covr);
         write.csv(
             coverage_to_list(
diff --git a/tests/testthat/perf_files/azure-pipeline_perf-profile.csv b/tests/testthat/perf_files/azure-pipeline_perf-profile.csv
index 77f556bc..5267505e 100644
--- a/tests/testthat/perf_files/azure-pipeline_perf-profile.csv
+++ b/tests/testthat/perf_files/azure-pipeline_perf-profile.csv
@@ -1,5 +1,5 @@
 "refer_name","rate","lower_tolerance","upper_tolerance"
-"meanDS::perf::numeric::0","2998.9844","0.5","2"
-"meanDS::perf::numberAndNA::0","3027.3963","0.5","2"
-"varDS::perf::numeric::0","3124.4088","0.5","2"
-"varDS::perf::numberAndNA::0","3146.532","0.5","2"
+"meanDS::perf::numeric::0","4497.0","0.5","2"
+"meanDS::perf::numberAndNA::0","4542.0","0.5","2"
+"varDS::perf::numeric::0","6373.0","0.5","2"
+"varDS::perf::numberAndNA::0","4500.0","0.5","2"
diff --git a/tests/testthat/test-perf-meanDS.R b/tests/testthat/test-perf-meanDS.R
index 53e4c7af..c8ecf405 100644
--- a/tests/testthat/test-perf-meanDS.R
+++ b/tests/testthat/test-perf-meanDS.R
@@ -26,7 +26,7 @@ set.standard.disclosure.settings()
 
 # context("meanDS::perf::numeric")
 test_that("numeric meanDS - performance", {
-    skip_on_cran()
+#    skip_on_cran()
 
     input <- c(0.0, 1.0, 2.0, 3.0, 4.0)
 
@@ -45,10 +45,10 @@ test_that("numeric meanDS - performance", {
     .current.rate   <- .count / (difftime(.current.time, .start.time, units = "secs")[[1]])
     .reference.rate <- perf.reference.rate("meanDS::perf::numeric::0")
     if (any(length(.reference.rate) == 0) || any(is.null(.reference.rate))) {
-        print(paste("meanDS::perf::numeric::0 ", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper()))
+        write(paste("meanDS::perf::numeric::0 ", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper()), stderr())
         perf.reference.save("meanDS::perf::numeric::0", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper())
     } else {
-        print(paste("meanDS::perf::numeric::0 ", format(.current.rate, digits = 8), ", ", format(100.0 * .current.rate / .reference.rate, digits = 4), "%", sep = ''))
+        write(paste("meanDS::perf::numeric::0 ", format(.current.rate, digits = 8), ", ", format(100.0 * .current.rate / .reference.rate, digits = 4), "%", sep = ''), stderr())
     }
 
     .reference.rate            <- perf.reference.rate("meanDS::perf::numeric::0")
@@ -61,7 +61,7 @@ test_that("numeric meanDS - performance", {
 
 # context("meanDS::perf::numeric with NA")
 test_that("numeric meanDS, with NA - performance", {
-    skip_on_cran()
+#    skip_on_cran()
 
     input <- c(0.0, NA, 2.0, NA, 4.0)
 
@@ -80,10 +80,10 @@ test_that("numeric meanDS, with NA - performance", {
     .current.rate   <- .count / (difftime(.current.time, .start.time, units = "secs")[[1]])
     .reference.rate <- perf.reference.rate("meanDS::perf::numberAndNA::0")
     if (any(length(.reference.rate) == 0) || any(is.null(.reference.rate))) {
-        print(paste("meanDS::perf::numberAndNA::0 ", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper()))
+        write(paste("meanDS::perf::numberAndNA::0 ", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper()), stderr())
         perf.reference.save("meanDS::perf::numberAndNA::0", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper())
     } else {
-        print(paste("meanDS::perf::numberAndNA::0 ", format(.current.rate, digits = 8), ", ", format(100.0 * .current.rate / .reference.rate, digits = 4), "%", sep = ''))
+        write(paste("meanDS::perf::numberAndNA::0 ", format(.current.rate, digits = 8), ", ", format(100.0 * .current.rate / .reference.rate, digits = 4), "%", sep = ''), stderr())
     }
 
     .reference.rate            <- perf.reference.rate("meanDS::perf::numberAndNA::0")
diff --git a/tests/testthat/test-perf-varDS.R b/tests/testthat/test-perf-varDS.R
index 9df6c0f6..922db89a 100644
--- a/tests/testthat/test-perf-varDS.R
+++ b/tests/testthat/test-perf-varDS.R
@@ -26,7 +26,7 @@ set.standard.disclosure.settings()
 
 # context("varDS::perf::numeric")
 test_that("numeric varDS - performance", {
-    skip_on_cran()
+#    skip_on_cran()
 
     input <- c(0.0, 1.0, 2.0, 3.0, 4.0)
 
@@ -45,10 +45,10 @@ test_that("numeric varDS - performance", {
     .current.rate   <- .count / (difftime(.current.time, .start.time, units = "secs")[[1]])
     .reference.rate <- perf.reference.rate("varDS::perf::numeric::0")
     if (any(length(.reference.rate) == 0) || any(is.null(.reference.rate))) {
-        print(paste("varDS::perf::numeric::0 ", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper()))
+        write(paste("varDS::perf::numeric::0 ", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper()), stderr())
         perf.reference.save("varDS::perf::numeric::0", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper())
     } else {
-        print(paste("varDS::perf::numeric::0 ", format(.current.rate, digits = 8), ", ", format(100.0 * .current.rate / .reference.rate, digits = 4), "%", sep = ''))
+        write(paste("varDS::perf::numeric::0 ", format(.current.rate, digits = 8), ", ", format(100.0 * .current.rate / .reference.rate, digits = 4), "%", sep = ''), stderr())
     }
 
     .reference.rate            <- perf.reference.rate("varDS::perf::numeric::0")
@@ -61,7 +61,7 @@ test_that("numeric varDS - performance", {
 
 # context("varDS::perf::numeric with NA")
 test_that("numeric varDS, with NA - performance", {
-    skip_on_cran()
+#    skip_on_cran()
 
     input <- c(0.0, NA, 2.0, NA, 4.0)
 
@@ -80,10 +80,10 @@ test_that("numeric varDS, with NA - performance", {
     .current.rate   <- .count / (difftime(.current.time, .start.time, units = "secs")[[1]])
     .reference.rate <- perf.reference.rate("varDS::perf::numberAndNA::0")
     if (any(length(.reference.rate) == 0) || any(is.null(.reference.rate))) {
-        print(paste("varDS::perf::numberAndNA::0 ", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper()))
+        write(paste("varDS::perf::numberAndNA::0 ", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper()), stderr())
         perf.reference.save("varDS::perf::numberAndNA::0", .current.rate, perf.profile.tolerance.lower(), perf.profile.tolerance.upper())
     } else {
-        print(paste("varDS::perf::numberAndNA::0 ", format(.current.rate, digits = 8), ", ", format(100.0 * .current.rate / .reference.rate, digits = 4), "%", sep = ''))
+        write(paste("varDS::perf::numberAndNA::0 ", format(.current.rate, digits = 8), ", ", format(100.0 * .current.rate / .reference.rate, digits = 4), "%", sep = ''), stderr())
     }
 
     .reference.rate            <- perf.reference.rate("varDS::perf::numberAndNA::0")