Attempt to speedup AppVeyor

test/appveyor.yml

@@ -8,7 +8,7 @@
 # See https://svn.boost.org/trac/boost/wiki/TravisCoverals for description of this file
 # and how it can be used with Boost libraries.
 #
-# File revision #1
+# File revision #2
 
 init:
     - set BRANCH_TO_TEST=%APPVEYOR_REPO_BRANCH%
@@ -42,15 +42,9 @@ before_build:
     - git remote add --no-tags -t %BRANCH_TO_TEST% origin https://github.com/boostorg/boost.git
     - git fetch --depth=1
     - git checkout %BRANCH_TO_TEST%
-    - git submodule update --init --merge
+    - git submodule update --jobs=4 --init --merge
     - git remote set-branches --add origin %BRANCH_TO_TEST%
     - git pull --recurse-submodules
-    - git submodule update --init
-    - git checkout %BRANCH_TO_TEST%
-    #- git submodule foreach "git reset --quiet --hard"
-    #- git submodule foreach "git clean -fxd"
-    - git reset --hard
-    - git clean -fxd
     - git status
     - rm -rf %BOOST%/libs/%BOOST_REMOVE%
     - mv %APPVEYOR_BUILD_FOLDER% %BOOST%/libs/%PROJECT_TO_TEST%